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i5 750 + Noctua NH-U9B-SE2 = high temps?

post #1 of 27
Thread Starter 
Hi there.

I recently decided to indulge a little and overclock my rig a bit. What kind of prompted me were the temps that I was getting with the stock cooler on my i5 750 - it would reach 86degrees under prime95 after 5-10 mins so that kinda had me worried. I then decided to see my gtx 470 temp and that too was pretty high, 95degrees on stock (although I know that the Fermi is pretty durable I still thought I could improve this).

So, I went out and bought the Noctua NH-U9B-SE2 and 3 Noctua case fans (140mm + 92mm as outtake and a 80mm as intake). I cleaned out the case and graphics card fan and got pretty good results.

I managed to OC the gtx 470 to 1600/800/1700 (shader/core/mem) and the max load temp is now 88degrees (a full 7 degrees lower than the stock was running at).

I then decided to OC the cpu. I've got a Gigabyte P55A-UD3 and following the instructions from this video:

http://www.youtube.com/watch?v=Llqhe3N1cJA&feature=player_embedded#!

I managed to get a pretty easy overclock of 3.5Ghz (from 2.67Ghz stock). I followed Linus' advice and just Enabled the Load Line Calibration which automatically adjusts the voltages.

Now to my question: the overclocked temperatures I'm getting are slightly higher than I expected. I'm getting around 85degrees under prime95 load which I thought was a bit high for a relatively decent cooler. Are those temps normal? If not, could I have applied the thermal paste incorrectly? I followed the instructions from this article

http://benchmarkreviews.com/index.php?option=com_content&task=view&id=150&Itemid=62

and just put a relatively small dot on the cpu and then installed the heatsink.
The case I've got is a medium to small sized case with 3 fans mentioned above. There's only 1 hdd and the cables are all very neatly cable-tied. The case temperature is 36degrees.

I'd appreciate any help and will post case/fan pictures if requested.

ps: the NH-U9B-SE2 is oriented in a horizontal way with the direction of flow pushing the air to one of the outtake fans at the back of the case.
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c64
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post #2 of 27
Quote:
Originally Posted by Commodore_64;15578214 
OP (Click to show)
Hi there.

I recently decided to indulge a little and overclock my rig a bit. What kind of prompted me were the temps that I was getting with the stock cooler on my i5 750 - it would reach 86degrees under prime95 after 5-10 mins so that kinda had me worried. I then decided to see my gtx 470 temp and that too was pretty high, 95degrees on stock (although I know that the Fermi is pretty durable I still thought I could improve this).

So, I went out and bought the Noctua NH-U9B-SE2 and 3 Noctua case fans (140mm + 92mm as outtake and a 80mm as intake). I cleaned out the case and graphics card fan and got pretty good results.

I managed to OC the gtx 470 to 1600/800/1700 (shader/core/mem) and the max load temp is now 88degrees (a full 7 degrees lower than the stock was running at).

I then decided to OC the cpu. I've got a Gigabyte P55A-UD3 and following the instructions from this video:

http://www.youtube.com/watch?v=Llqhe3N1cJA&feature=player_embedded#!

I managed to get a pretty easy overclock of 3.5Ghz (from 2.67Ghz stock). I followed Linus' advice and just Enabled the Load Line Calibration which automatically adjusts the voltages.

Now to my question: the overclocked temperatures I'm getting are slightly higher than I expected. I'm getting around 85degrees under prime95 load which I thought was a bit high for a relatively decent cooler. Are those temps normal? If not, could I have applied the thermal paste incorrectly? I followed the instructions from this article

http://benchmarkreviews.com/index.php?option=com_content&task=view&id=150&Itemid=62

and just put a relatively small dot on the cpu and then installed the heatsink.
The case I've got is a medium to small sized case with 3 fans mentioned above. There's only 1 hdd and the cables are all very neatly cable-tied. The case temperature is 36degrees.

I'd appreciate any help and will post case/fan pictures if requested.

ps: the NH-U9B-SE2 is oriented in a horizontal way with the direction of flow pushing the air to one of the outtake fans at the back of the case.
Hello! Temps are useless without the ambient temp. what is your ambient temp? (The temp inside.)

Also, it could be because you're used to Linus' temps. Remember that he is from Canada and probably says all of the temperatures in Celsius.

Also, next time use MX-4 thermal paste as Noctua's isn't very good.
   
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post #3 of 27
Also, add your system to you're sig using this. This helps us troubleshooting and also means that you don't have to type your specs in every post. Sorry for double posting but I didn't want you to miss out on this important info.
   
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post #4 of 27
Thread Starter 
Hi sp, thanks for the advice - I've updated my spec signature.

The ambient temp is around 22 degrees celsius atm - I'm from Australia so I definitely understand Linus' temp readings wink.gif The case temp is around 36 degrees if you missed it at the end of my post.

I thought Noctua's paste wasn't too bad, at least according to the ranking at the website I mentioned - which was linked in the air cooling sticky post. However, I suppose I could grab something better. But would thermal paste really account for those sorts of temps?
c64
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post #5 of 27
Quote:
Originally Posted by Commodore_64;15578599 
Hi sp, thanks for the advice - I've updated my spec signature.

The ambient temp is around 22 degrees celsius atm - I'm from Australia so I definitely understand Linus' temp readings wink.gif The case temp is around 36 degrees if you missed it at the end of my post.
I live in Australia too! 80c+ is very high. I don't recommend going above 80 for most processors. Sorry. I missed the case temps. The temp is oddly high. Remember, all processors overclock differently. I'm not very used to the 1156 platform so sadly I can't offer a substantial amount of advice. Though that temp. is worrying.
Quote:
Originally Posted by Commodore_64;15578599 
Hi sp, thanks for the advice - I've updated my spec signature.

The ambient temp is around 22 degrees celsius atm - I'm from Australia so I definitely understand Linus' temp readings wink.gif The case temp is around 36 degrees if you missed it at the end of my post.

I thought Noctua's paste wasn't too bad, at least according to the ranking at the website I mentioned - which was linked in the air cooling sticky post. However, I suppose I could grab something better. But would thermal paste really account for those sorts of temps?
I'd always use MX-4 but it isn't worth taking it off as the temp. difference would be very little. Did you spread the TIM all over the CPU or did you just put a grain of rice? How much did you put on?

EDIT: BTW that TIM test is really old (but still excellent). I remember when I read that a long time ago!
Edited by asuperpower - 11/5/11 at 12:58am
   
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HAF X Steelseries Sensei [RAW] Rubberised AG Holomat Interdyn P1.5 Hi-Fi speakers 
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post #6 of 27
ok since you have a gigabyte mobo like me and an i5 750 i should be able to help you out.

you dont want load line calibration.

what you want is the dynamic vcore feature working. Once I updated my bios to F11 it gave me the option.

you need a memory stick to do it (its easier) you might be able to just use a disk.

you want to overclock starting from the bottom and work your way up. overclocking by just throwing all the numbers and voltages up is faster but you often end up with high temps and a sub par overclock. I had done that in the past, by setting the voltage to something stable and gradually taking it down but this gives you more heat and as a reault limits the overclock that you really can achieve.

start off by setting everything to normal and find out your maximum bclk first off. having a higher bclk makes the system snappier too (with me anyhow).

to do this increase it by 10 each test. use intel burn test. for 5 runs with 2GB of ram. 5 runs isnt much but it will do while you find some base numbers. when it starts failing up the vtt voltage by maybe 2 notches then test again. keep doing this untill you cannot go any higher with a MAXIMUM of 1.21vtt. I was able to reach 200bclk. but i think i was lucky.

while doing that its also going to have an effect on your cpu speed, and ram speed because everything is connected to the bclk (base clock)

so to eliminate the possibility of instability coming from either of these while finding the maximum bclk, turn the cpu and ram multipliers down enough so that even with 200 bclk the cpu is not going to go over 2.66GHz and ram 1600 or whatever your ram is rated for.

the point here is, you wont be able to effectively find your max bclk if other components are failing and therefore you wont get the system stable no matter how much vtt you add etc.......

once you have your max bclk, then your ready to start increasing the multipliers and fimd your max oc.

basically run intel burn test for runs of 10 now, 2GB test size, while raising your multiplier each test. giving a small bump to the vcore each time. make a note of what voltage the cpu is actuly consuming via CPU Z.

your temps will be nice and low this way as your only going to use more voltage as you need it, and vtt is only 1.21.

eventially when you cant seem to get stable, just return to the last speed and do a 20 run test, and e entially a 50. mine became unstable on run 20 before. so you need 50 runs so be sure.

in the end when you have finished fiddleing, make a note of what voltage was being consumed at max oc ( this will generally be lower than what you set in the bios because of a thing called vdroop, so you need to set it a little higher than what you really want usualy) - return the vcore to normal and use the dynamic vcore setting below.

here you set the value to + whatever you need for your newly found speed. i needed to set mine much higher that what was actually being consumed, think im at + 0.2v or something, which would be 1.45v, but the highest ive seen it use is 1.39v, which is exactly what i need at peak power.

doing this allows your cpu to underclock and lower its voltages whenever its idle, and oy use max when needed. so you get thw best of both worlds.

hope ive been helpfull.

dont use more than 1.4vcore and dont run it more than 76/77 C.
    
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post #7 of 27
sorry stupid iphone so just making another post. when i said add more vcore each time i obviously ment if it fails.

yes i wrote all that from my iphone lol. quite difficult but i cant sleep so its all good.
    
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post #8 of 27
Thread Starter 
Thanks for the very detailed post Julian. I'll definitely do it that way and see what kind of results I can get.

Regarding the thermal paste SP, I used about a grain of rice without spreading and just mounted the sink. What I'll probably do is take off the sink to see if the application was good or bad; if good then just clean & repeat and rule that off as the problem and if it was bad then I'll do a different application (like spreading manually or something).

Thanks again guys.
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c64
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post #9 of 27
Thread Starter 
Edit: haha the detailed post is even more impressive coming from a phone wink.gif
c64
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c64
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post #10 of 27
no probs thanks for the rep i can use market place now smile.gif

let us know how you get on
    
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