[hichkas]

i had 4790k none OC and never get up 78C under stress with Deepcool Gammaxx 300.
but with new rig i have heat issue on 6700K on stock Clock none oc.
idle:40C
under load with aida64 after 1min : 90C
clean cpu and Fan and reinstall with Deepcool Z5 thermal grease.but nothing change
1-without case door heat never get up 73c
2-with case door and igpu 530 get up 76c
3-with case door and Msi gtx970 get 87~90C
checked heat of pip
when remove fan and work only with heat sink, i touch pips and feel heating so much on pips even aluminum blade
but when fan working pips just a little bit warms under 75C !!!
coolermaster silencio case have a 2 factory installed fan 140mm with 800rpm speed. one in fornt of case one in rear case .

any idea can help a lot. Thx

Cpu: Core i7 6700K
Cpu Fan: Deepcool Gammaxx 300
MB: Gigabyte Z170X-UD3
Ram: Gskill Ripjaws DDR4 2800Mhz CL16
VGA: Msi 970 Gaming 4G
PSU: Evga 750W G2
Case:Coolermaster Silencio 452

10-4-2015.jpg 662k .jpg file

 

[psyclum]

gammaxx 300 is a 3 heatpipe heatsink. not exactly the most high performance cooler. not saying it wont work, but wouldn't put too much hope into having low temps. 90C is technically a "safe temp" for your chip so that's that.

there is also the concern of how much heat your GPU is dumping into the case. if i'm reading your post correctly, you are showing a rise of 11~14C on the CPU with the gtx970 installed? that's extremely bad airflow inside the case and you need to seriously pump up those factory fans to get some airflow inside the case. unfortunately you are not working with hardware that will allow for silence so silencio 452 is not the best option for keeping things cool... also... what speed are you spinning the fans at on your heatsink? that temp seems high even for a 3 pipe cooler. are you running the fans on a silent / low voltage mod or something that is restricting the deepcool fan from spinning up to the full 1600RPM? anyway...

1st step is to remove ALL of your expansion slot covers from the back of your case and see where the temps are from there. you need to remove the heat dumped by the GPU before it starts to cook your CPU.

2nd step is to relocate your rear exhaust fan to the front as an intake fan. you need ALOT more cool air going into the case

3rd step remove the HDD cage above the 2 bottom HDD. it's just blocking airflow

4th step is to reconsider your HSF on the CPU. 3 pipe cooler is decent if you are just watching youtube. but you really want something with alittle better performance if you are going to hammer it with AIDA. granted you aren't OCing, but you aren't exactly helping it to get better temp then "intel coolers" either (i know there is no such thing as stock intel cooler for skylake, but you know what i mean

)

5th step this is going to void your warranty!!! but you may want to look up delidding your chip and keep that in the back of your mind so you know what your final option is. watch a few youtube on it and go read this thread
http://www.overclock.net/t/1568357/skylake-delidded

 

[LiamG6]

ditch the stock intake and exhaust fans, they are useless. buy 3 cheap XSPC 120mm Xinrullian 1650rpm or 2000rpm fans, 2 in front intake, 1 in rear exhaust. you could also buy 2 XSPC 140mm 1350rpm fans for the front intake but 120mm fans fit too. cheap way to massively increase your airflow in that case. do everything that psyclum said, shouldn't need to delid if not overclocking, but if you do want to overclock you better buy a new cpu heatsink and also consider delidding

could also change your power supply orientation so it exhausts air out of the inside of the case rather than pulling from under the case, but judging by the internal temps of your case it might not be a good idea to blow that hot air through your psu

 

[hichkas]

unlike rest of world in my country just 2 brand of Accessories have a reasonable price.
1-Deepcool
2-hermalright
with my budget i must choice Between (thermalright Macho Rev.A) VS (Deepcool Lucifer v1) Their prices cheaper 10$ than Coolermaster 212EVO
first i am not sure they are fit in my case ?
Second if they cant resolve my heat issue is wasted money because Shopkeeper not to take them back.
anyway i will add Third exhaust fans to my only place of case in front.irony is point of buy this bloody CM Silencio case for been silence and now i must change fans to higher rpm and add new one , such a waste

which one is better choose ?! Deepcool Lucifer or thermalright Macho Rev.A
thx for helping me

 

[Viscerous]

I'm on a Hyper 212 Evo with my 6700k in an NZXT H440 which is also a silent case with mediocre cooling. It often gets around 80F in the room the PC is in. I was hitting up to 84C at very demanding load so I also thought I had problems. Did a heatsink reseat and redid the thermal paste but didn't see any real differences in temperatures. My idle temperatures are a bit lower than yours at 36C. My video card is also a 970 (EVGA GTX 970 FTW). I'm not sure about the MSI 970s, but the EVGA ones don't have the fans spin unless there is load in the GPU. It's definitely going to hurt temperatures a bit with it in.

 

[LiamG6]

That Thermalright cooler looks pretty good, but only buy that if you are going to over clock your CPU more, as for fitting in your case, it's 162mm tall so you could measure your clearance from your motherboard to your side panel. I'd sort out the airflow issues in the case before buying another cooler. I'm not sure that it is worth keeping the 2 stock 800rpm fans as with all the filters and the door on the front of that case and all the sound dampening foam in that case it's basically a little oven, not good with a hot CPU and GPU. I'd really get 3 new fans to get as much airflow in that case as possible. You're better off spending money on really good quiet fans than buying a case with sound dampening material in them as those cases just make your components run so hot which means you need louder fans, better to have a case with optionsto put very quiet fans so you can have good case air flow to keep things cool and quiet.

EDIT: coolermaster lists the silencio as being compatible with 158mm CPU heatsinks so the Thermalright Macho Rev. A is too tall. It looks like the Deepcool is also too tall.

Are there any cheap 240mm AIO watercooling kits where you are? That would be the best bet although your GPU will still be toasty

If you improve the air flow through your case with 3 new fans you may be ok with your current CPU heatsink for a mild overclock, delid would really help there too. The gammaxx 300 is a 130w cooler so it's pretty bad but should be sufficient for your CPU with a mild OC

 

[doyll]

Quote:

Originally Posted by hichkas

i had 4790k none OC and never get up 78C under stress with Deepcool Gammaxx 300.
but with new rig i have heat issue on 6700K on stock Clock none oc.
idle:40C
under load with aida64 after 1min : 90C
clean cpu and Fan and reinstall with Deepcool Z5 thermal grease.but nothing change
1-without case door heat never get up 73c
2-with case door and igpu 530 get up 76c
3-with case door and Msi gtx970 get 87~90C
checked heat of pip
when remove fan and work only with heat sink, i touch pips and feel heating so much on pips even aluminum blade
but when fan working pips just a little bit warms under 75C !!!
coolermaster silencio case have a 2 factory installed fan 140mm with 800rpm speed. one in fornt of case one in rear case .

any idea can help a lot. Thx

Cpu: Core i7 6700K
Cpu Fan: Deepcool Gammaxx 300
MB: Gigabyte Z170X-UD3
Ram: Gskill Ripjaws DDR4 2800Mhz CL16
VGA: Msi 970 Gaming 4G
PSU: Evga 750W G2
Case:Coolermaster Silencio 452

10-4-2015.jpg 662k .jpg file

As already said, your temps are okay.
The reason your temps are higher than reviews is because your case is not supplying air to GPU as cool as in tests.
I have not used the Silencio 452, but looking at reivews it appears the front airflow is rather restricted. This means you need intake fans that have higher pressure ratings than normal to flow enough air.
Try opening the front door and see it that lowers the temps.
You might find "Ways to Better Cooling" link in my sig of interest. 1st post is index. Click on subjects of interest to open them.

 

[psyclum]

Quote:

Originally Posted by hichkas

unlike rest of world in my country just 2 brand of Accessories have a reasonable price.
1-Deepcool
2-hermalright
with my budget i must choice Between (thermalright Macho Rev.A) VS (Deepcool Lucifer v1) Their prices cheaper 10$ than Coolermaster 212EVO
first i am not sure they are fit in my case ?
Second if they cant resolve my heat issue is wasted money because Shopkeeper not to take them back.
anyway i will add Third exhaust fans to my only place of case in front.irony is point of buy this bloody CM Silencio case for been silence and now i must change fans to higher rpm and add new one , such a waste

which one is better choose ?! Deepcool Lucifer or thermalright Macho Rev.A
thx for helping me

both deepcool and thermalright are VERY good brands for cooling so count that as a blessing. I personally went with lucifer because it was on sale

. overall i would say pick up whichever is on sale / cheaper between the 2. also try to get the macho zero instead of the normal macho so you can get the exhaust shroud but that depends on the availability and price.

as for fitting, you are correct, they may not fit (just noticed the recommended HSF for silencio 452 is only 158mm tall so neither cooler will fit according the that specification,) however manufacture spec's aren't always "correct" in terms of what will actually fit in there. so.. for now, just hold off on buying the cooler till you have fixed your intake airflow problem.

if you are going to buy a 3rd fan, i would strongly recommend you get something high quality and designed for static pressure. high quality fans migrate from build to build so it's not like you are only going to use the fan for this build and throw it away after, you will use the fan on your next build and the build after that. Doyll will be a better person to listen to then me when choosing which thermalright fan to buy. i don't keep up with the model numbers of the latest and greatest fans these days since i haven't needed to buy new fans for a decade now

Put the "good" fan on the top of the front intake. relocate the stock front intake to the bottom of the front intake area and leave the rear exhaust where it is. try that out and see how your temps are. together with removing the expansion slot covers as well as removing the HDD cage, it should produce some very noticeable results in your temps. with proper case airflow, your CPU should NOT be much hotter then your 4790k. if you were getting 78C from the 4790k then your 6700k really shouldn't be much more then 80C w/o OC since the TDP of the 4790K is 88w and the TDP of the 6700K is only 95w. there is a difference of 7w thermal output between the 2 chips at stock settings so temp difference shouldn't be too huge.

as far as silence is concerned, better airflow will actually provide better acoustic signature overall. the more heat that stays inside the case, the harder the fans inside the case has to work. even if you aren't paying the decibels from the case fan, you sure are paying for alot more decibels from your GPU and CPU HSF.

 

[hichkas]

let me Explain how bad is my situation

i have a 4 storage device
one ssd samsung 850 evo 250GB and one 1TB WD Black and 2x3TB Wd green
i cant remove storage cage from case

at the first time I thought skylake is cooler than devil canyon Because it is 14nm . then if my case and HSF Support 4790K then can Support 6700K even cooler and quieter
So it turned out i am mistake .
based on Comments received from you all , this idea has occurred to me that , it seems i could this regards HSF and possbily consider AIO Liquid cooler method.
of course , i am not certain how much heat liquid cooling radiator will generate which can adversely affect my HDD, because the only place where i can install the AIO Liquid cooler is behind the HDDs cage.
and i am scare of liquid cooling leak risk
anyway here is list of AIO Liquid cooler i can buy

• Antec Kühler H2O 650
• Corsair H100i
• Corsair H80i
• Corsair H60
• Corsair H55
• Cooler Master Nepton 280L
• Cooler Master Nepton 240M
• Cooler Master Nepton 120XL
• Cooler Master Seidon 120V Plus
• DeepCool GAMER STORM Maelstrom 120K
• DeepCool Gamer Storm CAPTAIN 120
• DeepCool Gamer Storm CAPTAIN 240
• Enermax Liqtech 240-HP
• Enermax Liqtech 120X-HP
• Enermax Liqmax 240S-I

Thanks your all very mach to helping me

My Rig is

Spoiler: Warning: Spoiler!

Cpu: Core i7 6700K
HSF: Deepcool Gammaxx 300
MB: Gigabyte Z170X-UD3
Ram: 2x8GB Gskill Ripjaws DDR4 2800Mhz CL16
SSD: Samasung 850EVO 250GB
HDD: 1xWD Black 1TB & 2XWD Green 3TB
VGA: Msi 970 Gaming 4G
Pcie_x1: TBS 6922 DVB-S2
PSU: Evga 750W G2
Case:Coolermaster Silencio 452

 

[psyclum]

general rule of thumb, AIO coolers are louder then a good air cooler since it has both the fan noise as well as the pump noise. however, i do believe that a 120mm AIO cooler will help your situation if you set it up as an exhaust at the rear. if that is not possible in your case, then i wouldn't even bother with an AIO at all.

But that does NOT mean you wouldn't need the additional fan in the front of the case. whether you are going with air or AIO liquid, you will need to buy a high quality 140mm fan for the front intake because that is addressing the heat that is being dumped into your case by the GPU. it's an independent problem from your CPU cooling issue. it is a problem that greatly contribute to your CPU temp problem but that in itself is not the reason why you need the additional fan in the front. with more cool fresh intake in the front, your GPU will be cooler and therefor quieter since it wouldn't need to work as hard.

as far as AIO cooler, you have to consider the cost of an AIO vs the cost of a high quality HSF. generally speaking you can get a high quality cooler at the same price or cheaper then an AIO cooler and it will perform just as well if not better in both temp as well as acoustics. it is not impossible to find a high quailty air cooler that will fit into your case. Doyll is very knowledgeable in the thermalright products and i'm sure he can recommend something that will work. maybe something like a true/ultra120? seriously doubt a true140 will fit. price wise, it should be competitive with an AIO liquid cooler but performance wise, it should have the same cooling with quieter acoustic signature then an AIO.

it's unfortunate you are unable to remove the HDD cage in the front which is even more reason to get a high quality 140mm fan to push pass those obstructions. but before you do anything, I would strongly suggest that you put both of your stock fans in the front as intake and remove at least 3 of the expansion slot covers below the GPU. that should have "some" effect to your temps w/o spending any money right now. i would recommend that the minimum you should do right now to improve your situation is to buy a high quality 140mm fan to use as the top intake fan in your case and migrate the existing intake fan to the bottom of the front intake area. that should give you "noticeable" results. once you've done that and test it to see the temps, you can decide whether you want to spend additional $ into a high quality HSF or AIO cooler.

general rule of thumb. don't spend more $ then you need. but if you need to spend $, always buy high quality because it will both perform better as well as last ALOT longer. a high quality HSF will last at least a decade. I'm currently using my scythe infinity SCINF-1000 (circa 2007) in the machine i'm typing this reply on

and it's not showing any signs of aging since it was one of the stronger coolers back in its day. keep this in mind. a good heatsink designed to cool down 200TDP today will still cool down 200TDP 20 years from now. you may need to replace the fan since that's a moving part, but the heatsink itself does NOT wear out. (unless you live on a boat and are ALWAYS near salt water, then the aluminum fins may eventually corrode ) unfortunately the same can not be said about AIO coolers since the water pump is also a moving part and as with any moving part, it will eventually wear out.

 

[hichkas]

OMG you're so helpful thx a lot

other idea has occurred to me first tomorrow i will buy one case fan and install behind case then remove HSF fan(1600rpm) and add to front case beside stock fan (800rpm) then buy Deepcool Gammaxx 400 or Coolermaster 212X or evo (4pip HSF) even Noctua NH-U12S is fit in my case
with this config can i OC little bit cpu to 4.4Ghz?! or just resolve my heat issue?!
what your think?!
And what rpm should i consider for case fan ?!!
this is pretty expensive but i cant find better than this in my city
http://www.corsair.com/en/air-series-sp120-pwm-high-performance-edition-high-static-pressure-fan-twin-pack 38$
or i can buy deepcool 120mm 1300rpm 5$
or this http://www.enermax.com/home.php?fn=eng/product_a1_1_1&lv0=4&lv1=32&no=143 10$

My PC Parts

Spoiler: Warning: Spoiler!

Cpu: Core i7 6700K
HSF: Deepcool Gammaxx 300
MB: Gigabyte Z170X-UD3
Ram: 2x8GB Gskill Ripjaws DDR4 2800Mhz CL16
SSD: Samasung 850EVO 250GB
HDD: 1xWD Black 1TB & 2XWD Green 3TB
VGA: Msi 970 Gaming 4G
Pcie_x1: TBS 6922 DVB-S2
PSU: Evga 750W G2
Case:Coolermaster Silencio 452

 

[psyclum]

I don't recommend buying anything except the new fan for the front intake slot ATM. with the additional cool intake air volume, you may be satisfied with the overall performance. eventually you will want to possibly consider an upgrade to your silencio 452. the case wasn't really meant for gaming builds and the limitations for cooling on the case will hinder your future builds. ideal situation is to see if anyone you know would want to buy the silencio from you and you can maybe get a case that allows for better cooling options (170mm tall HSF instead of 158mm tall)

as far as fitting. technically speaking the gammaxx400 is listed as 162mm tall and the hyper212 is listed at 159mm tall... if you were to go by coolermasters specifications, neither of those coolers will fit.

however, here is a pic by overclock3d.net that shows a nzxt havik 120(160mm tall cooler) installed with practically no room to spare...



so it's safe to say the max height for cooler is 160mm. 162mm is a risk of not being able to fit inside. with that pic, i would say the hyper212 is a safe bet but the gammaxx400 is a question mark. however, there are other higher performing coolers that fits under that 160mm height limit including the legendary NH-D14 (still considered one of the best coolers on the market especially when height constraints is in place) which is only 158mm tall. whether you are able to buy NH-D14 in your country is not something i can answer, but it would be worth it to buy a cooler like the NH-D14 that has stood the test of time. even today it's considered one of the top 3 coolers on the market below 160mm tall. if you are unable to get noctua coolers, i'm sure there are thermalright coolers that perform close to a NH-D14 and still fits under 160mm tall. personally i prefer noctua cooler because of their mounting kit guarantee. if intel/AMD ever come out with a new socket that requires a different mounting bracket, noctua will supply the mounting bracket free of charge. you simply need to provide proof of ownership of a noctua cooler and that you have the motherboard that requires the new socket. (you can read this info from noctua's website.)

so... to sum things up. buy a front intake fan so both front intake slots are populated. it would be best if you get a high quality fan since you should be able to use a good fan for a long time.

see if you are able to live with the temps from the added intake fan. if yes. then hold off on buying something and save up for a real upgrade. i would prioritize getting something like a NH-D14 over a new case. technically, your case it "not that bad" if you have the proper airflow and the right cooler inside. with sufficient cool air intake and a NH-D14 it's likely you will see dramatic decrease in CPU temps.

eventually, you may consider a new case, but you wouldn't have to worry about it within the usable lifetime of your 6700K if you have a strong cooler like the NH-D14 with enough cool air intake.

 

[hichkas]

in noctua website NH-D14 height is 160mm http://www.noctua.at/main.php?show=productview&products_id=34&lng=en&set=1
and i measured my case height from cpu to edge of door exact 158mm
so i am not sure the legendary NH-D14 is fit to my case
but NH-U12S with 158mm is fit http://www.noctua.at/main.php?show=productview&products_id=63&lng=en&set=1
if i pay for decent fan and HSF it must be give me a more than resolve heat issue.like OC cpu
otherwise best way is sell my case and buy something with bigger space am i right ?!!
but really i love face design of my caseو Simple and gentle , and this is time to learn do not get in love base on face ..inside always Is more important than outside.(philosophy vision

)

 

[LiamG6]

just buy a good 140mm fan first like psyclum said. that is the only thing that is necessary to buy right now. no point having an awesome heatsink if you don't have any airflow through the case to keep the internal case temp down. If adding that extra good quality fan helps your temperatures, buy a second and maybe third fan to match it and get rid of the stock coolermaster fans. that should significanty reduce your case temps. if your cpu is still too hot at that point then buy a better heatsink like the U12s or NH-D14 like psyclum said.

as his front intake is so restricted by the door and filters etc, would a high static pressure fan or a high airflow fan achieve better results? seems to be some considerable restriction in the intake and also pushing through the HDD's so perhaps some new high static pressure fans like the EK vardar F1 140 1150rpm would be suitable, and they have a reasonable price too and should still be virtually silent.

 

[doyll]

Cooler Master say Silencio 452 has CPU cooler height: 158mm. As phyclum said 160mm will fit. I agree with phyclum, a better case would solve many problems. I'm only half awake and not thinking clearly. Let me think on it and post up a little later.

 

[psyclum]

basically a HSF and case are both considered LONG term investments in building computers. a well designed case, like a high quality heatsink will be in use for well over a decade while providing top of the line performance during its service life. therefor it's generally recommended that you buy top of the line units for those components since they do not become obsolete like your CPU, GPU, mobo, RAM, HDD, etc... they are the components that you carry from build to build until it suffers serious abuse like stripped screw threads, broken plastic components, obsolete connectors (firewire vs USB2 vs USB3 vs USB-C of the near future) or "better" technology becomes the market standard (80mm fans of a decade ago vs 120/140mm fans of today). heatsinks only need to be replace if you feel the newer technology on he market significantly improves upon your needs. like going from a 92mm heatsink to a 120mm/140mm heatsink, or going from a 3 pipe heatsink to a 6 or 8 pipe heatsink.

what you eventually decide on can be simplified by looking at historic data. within the last decade, PC CPU has not exceeded 160W TDP and GPU has not exceeded "300w" TDP (per specification, but in reality some cards approach 400w TDP) so there is a "fixed" amount of heat you need to deal with if you stay within the realms of "safe overclocking" the top of the line products on the market caters to that limit and try to provide the quietest products that can accomplish that goal. what it comes down to is if you buy the best now, it's unlikely that it will become obsolete in 10 years since both case design and HSF design has reached a level a maturity that the thermal load they need to deal with will not exceed the current capability.

can it change in 10 years? absolutely. once the diamond / graphene chips makes its way to the consumer market we may see a spike in temps. but i doubt seriously that the overall wattage needed to be cooled will increase significantly even if you are running a stock clock of 12GHz diamond chip 10 years from now. sure the CPU might show 300 to 400C, but that's the nature of those carbon chips

they are designed to have a safe temp of maybe 800C to 1000C

but considering how small the chip is, i'm sure it won't have a TDP of greater then 120w just like today

 

[hichkas]

god. you guys really helpful . i am speechless and read all your command over and over again.
4 hour later go to buy 2xfan pwm 140mm 1500rpm .install one of fan in top place of front case. The second one install on back of case. and set them in bios work on high speed
as soon as possible report back
cheers

 

[LiamG6]

 

[psyclum]

Quote:

Originally Posted by hichkas

god. you guys really helpful . i am speechless and read all your command over and over again.
4 hour later go to buy 2xfan pwm 140mm 1500rpm .install one of fan in top place of front case. The second one install on back of case. and set them in bios work on high speed
as soon as possible report back
cheers

i would start with just buying 1 fan.

but if they only sell them in pair then i would put both on the front and remove the stock front intake fan since it's only 800RPM so it wont pull too much air to make much temp difference. with 2 x 1500RPM fans in the front intake side you shouldn't have too much problems overcoming the resistance posed by the intake fan filter. leaving the 800RPM fan on the rear exhaust is plenty as long as you leave a few of the expansion slot covers off below the GPU. the positive pressure generated by the 2 strong intake fans should deliver enough airflow to offset a good amount of the heat dumped into the case by the GPU.

after you've added the intake fans. test out your temps under load and see what kind of improvement you get.

 

[doyll]

Quote:

Originally Posted by hichkas

god. you guys really helpful . i am speechless and read all your command over and over again.
4 hour later go to buy 2xfan pwm 140mm 1500rpm .install one of fan in top place of front case. The second one install on back of case. and set them in bios work on high speed
as soon as possible report back
cheers

Flattery will get you nowhere .. make that somewhere.

First let's work on case airflow. If you can get a cheap indoor / outdoor digital thermometer setup like I use (Ways to Better

• Cooling" posts 2 & 5) to see what the air temp is going into CPU and GPU coolers would be helpful.
• I agree, additional / better intake fan/s will hep a lot.
• The Thermalright TY-14x series fans are very good .. and being PWM makes it easy to control them with CPU &/or GPU PWM signals (posts 4 & 16).. Only problem is they are 152x141mm with 105mm (120mm fan) mounting holes. There are a couple of ways to make them work; posts 23 & 36.

CPU cooler:
The 212 is not bad, but Macho 120 and TRUE Spirit 120 are a few degrees better.

As others have said

• Improve case airflow with better fans
• Improve case airflow with better venting
• If that doesn't work, get case with better airflow & CPU clearance as a last resort

Case fans:

• We want fans that will move a good amount of air through the resistance created by front door, grill filter, hdd cage, etc.
• This means fans that have higher pressure ratings, because that is what P-Q curve show (post 11 in "Ways to Better Cooling")..
• When running high loads open the front door. This will allow more airflow to front vents.
• Thermalright TY-14x series fans are very good at this. Problem is they are 152x141mm with 105 (120mm fan) mounting holes. They are usually lower priced than similar fans .. and if you can square (post 36) and possible make 105-124.5 mount adapter (post 23) or mount with zipties.
• Added advantage is PWM case fans because they can be controlled with PWM signal from CPU &/or GPU PWM fan headers (post 4 & 15).

Case venting:

• Open door when system is working hard
• Remove PCIe slot covers allows airflow from front to back past GPU .. both removing heated GPU exhaust andsupplying more cool air to to it and at same time keeping heated exhaust from pre-heating cool air going to CPU cooler.
• Remove I /O cover to improve airlfow over mobo components .. especially between CPU and back of case
• Remove grills improve airflow and lowers noise dramatically. Usually no exhaust fan is needed when grills are removed.

I think with above or similar fans and mods your case will work very well.