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FX8350 Build - Heat issues?

1K views 14 replies 5 participants last post by  djflipnautikz 
#1 ·
Hey guys. Its been a while since the last time i OC a computer. And i am at it again. I am just having a problem with temps i think. i am using a Corsair H100 cooler.

Specs:
FX8350
Asus M5A99FX Pro 2.0
Ballistic 16gb 1600mhz ram
128gb ssd
Corsair H100 cooler
Ultra Gladiator case

Now at idle i am getting Socket temps of about 33c and core temps of around 17c.

When i use Prime and run Small FFT my core temp stays around 60c and my Socket temp is around 75c.

I think this is a little high.

the H100 didn't fit in the case without some mods. I installed the radiator on top of the case and mounted the fans underneath (in the case) and they are PULLING air from the outside over the radiators.

The other two fans or one intake and one exhaust.

My voltage for the CPU is between 1.25 and 1.2875v
and the cpu/nb is 1.25

i used this guide to get me started
http://www.overclock.net/t/1348623/amd-bulldozer-and-piledriver-overclocking-guide-asus-motherboard

When i run Prime95 and reach 61c core temp i shut it down (takes less than 5 min)

Any suggestions?

I was thinking of mounting another two fans ontop of the radiator?
Can i make it Push/Pull and what is the benefit?

I was trying to reach 5ghz if possible.

 
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#3 ·
Quote:
Originally Posted by atminside View Post

Sounds like you might need better airflow through your case.

Also, that motherboard has a VRM section that is a bit weaker than most of us like for overclocking an 8 core heat machine
What would you suggest?

Here is my case.



The openings i made for the radiator is restricting airflow i believe because the holes are smaller than the fans. Think i am going to start by that.

Any more fans i could add?
 
#4 ·
I think your fans are currently fighting against a natural convection. I think you may have better luck if you setup the RAD fans to exhaust, and then configure every other fan slot on the case to draw air into the case. Ideally creating a positive pressure environment that assists the flow over the radiator. In doing so you will create an environment where every fan in the system and natural convection is all working towards improving flow over the radiator. Granted this will mean that whatever thermals are dissipated in the case by other components will also be forced through the rad, however, with good FLOW, the air temp entering the radiator will only be very slightly elevated over ambient. The improved flow will more than compensate for the increased charge air temps.
 
#5 ·
Quote:
Originally Posted by mdocod View Post

I think your fans are currently fighting against a natural convection. I think you may have better luck if you setup the RAD fans to exhaust, and then configure every other fan slot on the case to draw air into the case. Ideally creating a positive pressure environment that assists the flow over the radiator. In doing so you will create an environment where every fan in the system and natural convection is all working towards improving flow over the radiator. Granted this will mean that whatever thermals are dissipated in the case by other components will also be forced through the rad, however, with good FLOW, the air temp entering the radiator will only be very slightly elevated over ambient. The improved flow will more than compensate for the increased charge air temps.
Natural convection is such a tiny force that even the slowest low rpm fans can easily over power it. To quote ehume: air goes where you push it. Personally I'm running top intake on my rad and that gave me better temps over all.

@ djflipnautikz. What RPM setting are you running on the H100? An FX-8350 gets fairly hot when you start to OC so to push high OC's you are going to have to run the fans at the full 2500rpm and even then things might well get to hot before hitting 5.0GHz. Also are you sure thous cuts of yours are big enough and not blocking the radiator?
 
#7 ·
H100 running at full blast. 2500rpm

Ok so first im going to enlarge to holes to eliminate the restriction of airflow over the rad.

Second, im going to install another fan on the side of the case.

And third im going to flip the rear fan to be intake.can I add anymore fans anywhere?

And does anyone have an idea on what temps I should be looking for with this cooler in optimal conditions.

Also should i have four fans on the radiator? Two on the inside and two on the outside?

Should i be worried with my psu an ultra 650w 80+ bronze
 
#8 ·
Quote:
Originally Posted by djflipnautikz View Post

H100 running at full blast. 2500rpm

Ok so first im going to enlarge to holes to eliminate the restriction of airflow over the rad.

Second, im going to install another fan on the side of the case.

And third im going to flip the rear fan to be intake.can I add anymore fans anywhere?

And does anyone have an idea on what temps I should be looking for with this cooler in optimal conditions.

Also should i have four fans on the radiator? Two on the inside and two on the outside?

Should i be worried with my psu an ultra 650w 80+ bronze
The holes for the air intake on the radiator need to be at least as big as the fans themselves. I prefer pull configuration to push as far as fan setups as far as radiators go. Air goes where you push it +1 .
Temps are pretty high for your clock and voltage, it's most likely you botched mounting the cooling block or paste application. It makes a huge difference if you can mount the cooling block perfectly flat against the heatspreader on the cpu, it's just too easy to do improperly and not get good contact across the entire heatspreader.

As for the psu, it depends on how many rails it has etc. My 8350 rig will pull 680+ watts when running 5 ghz with 100% load on cpu and gpu. I doubt you will come close to that in daily use though.
 
#9 ·
About the cpu, paste and the cooling block. I could have fudged it up. I have a question, the h100 cooling block had a grey film on it that was semi sticky, I still added tim, but maybe I shouldn't have and therefore not allowing for efficient transfer?

Well I just purchased three additional fans for my case. I will add one on the side opening, and two additional fans on top of the radiator.

Im going to enlarge the holes, and install some fan grills if its too woobly.

question is how should I setup the fans?

I was thinking to have all the case fans as intake and for the rad, half side Intake and the other half exhaust. Or just exhaust through the rad everything?

any other configurations you guys suggest.
 
#11 ·
Quote:
Originally Posted by atminside View Post

That was the factory TIM. You definitely have too much. Remount the cooler on the CPU.

Fans on the H100 should be exhaust.

Front and side should be intake, top and rear should be exhaust.
Ok so will remount. Clean pre applied tim and the tim I applied and then reapply a pea size. I am using thermalfusion 400

Would like create a positive pressure and have a total of 7 fans. 4 for the rad, one rear, one side and one front.

Someone suggested earlier to have the 3 case fans intake, and exhaust through the rad.

However since u will have fans on both side of the rad, having all four exhaust, wouldnt that be too much exhaust?

Thats why I was thinking of only having one side of the rad exhaust (push pull)
 
#12 ·
The only configuration I have found, that "beats" the traditional intake-low and exhaust-high for CPU temps, was with ALL case fans blowing IN, and the CLC RAD fan exhausting. The "assist" results in as much as a 4C drop in CPU temps for me. This allows me to run 5ghz under load without needing to run the radiator fan at 2400RPM.

The worst cooling performance was with the case operating "backwards" trying to exhaust heat low and pull in fresh up high. Th nuances of convection seem to have an effect, albeit minimal, a couple degrees is still a couple degrees. It could be related to the fact that I run relatively low RPM case fans, so the heat exhausted around the case probably rises right up around the case and gets sucked back in the top, lol.
 
#13 ·
Quote:
Originally Posted by mdocod View Post

The only configuration I have found, that "beats" the traditional intake-low and exhaust-high for CPU temps, was with ALL case fans blowing IN, and the CLC RAD fan exhausting. The "assist" results in as much as a 4C drop in CPU temps for me. This allows me to run 5ghz under load without needing to run the radiator fan at 2400RPM.

The worst cooling performance was with the case operating "backwards" trying to exhaust heat low and pull in fresh up high. Th nuances of convection seem to have an effect, albeit minimal, a couple degrees is still a couple degrees. It could be related to the fact that I run relatively low RPM case fans, so the heat exhausted around the case probably rises right up around the case and gets sucked back in the top, lol.
Well I opened the holes of the radiator. And added the three extra fans.

Also reapplied tim. (There was a TON when I removed it which leads me to believe the probable culprit of the high temps under load)0

Installed the rad fans in a push pull config. And left the rear fan as exhaust at the moment.

currently have front intake, side intake, and front half of the rad, as intake.

I have noticed about a 4 to 5 degree difference already. Have not put full load yet though
 
#14 ·
Quote:
Originally Posted by djflipnautikz View Post

Also reapplied tim. (There was a TON when I removed it which leads me to believe the probable culprit of the high temps under load)0

I have noticed about a 4 to 5 degree difference already. Have not put full load yet though
That's what happens when its double TIM'd
tongue.gif


I'm expecting ~15C drop on load.
 
#15 ·
Quote:
Originally Posted by atminside View Post

That's what happens when its double TIM'd
tongue.gif


I'm expecting ~15C drop on load.
Well....

I did a Small fft on prime and got it down to 52c at socket and 35c at core. Stock voltage of 1.2875.

I have it at 4.4g with stock voltage and it gets max socket 72c and core 53c.

Using prime i think thats ok since its the MOST it will ever i see.

Also i had the stock cpu fan that i kinda had mounted on the rail next to the VRM. and my socket temps was 68c. and my core 51c. Didnt know it would make a difference.

Think i am going to put it back on. i removed it because it was angled, and thought it was doing nothing.
 
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