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Help oc'ing i5 750 (idle temps way too high)

post #1 of 8
Thread Starter 
Hi. Just joined the forums. Lots of helpful guides here.

To start. My specs are as follows...

Mobo: p7p55 LX
Bios Version: 1201
Processor: i5 750 oc'd to 4.0
Cooler: Corsair H60 with stock thermal paste
Gpu: Ati 5850
Ram: 4x2 gb sticks ddr3 1600
Timings: 8/8/8/21
Fan speeds: Sysfan ~4200 rpm, Cpufan ~1900 rpm

Oc variables
Voltage: 1.408 V
Multiplier: x21.0
Bus Speed: 190 MHz
QPI: 3434 MHz

Idle Temps
Cpu: ~55-57 C
Gpu: ~35 C
Hdd: ~35 C
Ambient: ~23 C

Load Temps
Haven't run yet. Idle temps seem way too high that I don't wanna risk it.

My case, the NZXT Evo, currently has only the output fan from the h60 blowing out the back, and a side 120mm fan blowing outwards as well. The two top (140mm?) fans aren't working any longer. Does anyone have any advice for me to get these temps down, or am I worried about nothing? I've seen in other forums people boast at load temps on a 4.0 GHz i5 750 as low or lower than my idle temps.

Thanks for your time,
Jason
post #2 of 8
Sir, i recommend you follow this guide. Works flawlessly.

http://www.legionhardware.com/articles_pages/intel_core_i5_750_overclocking_guide,4.html
Edited by hellphyre - 2/1/12 at 12:59am
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post #3 of 8
Thread Starter 
Thanks, I'll give that link a try. Just for fun I ran prime95 for 5 seconds, and my temps shot up to near 100c. Definitely something wrong. O_o
post #4 of 8
Thread Starter 
I used that oc'ing profile that you listed and I'm now seeing idle temps of around 45-49 C. Prime 95 pushed the cores to a max of 85, but most sat around 75C, which according to the net, is above safe operating range. Now I know I'll probably never actually be running anything near as intensive as prime95, but these numbers have me worried.
post #5 of 8
Thread Starter 
Bumping for attention on the issue.

Edit- bought some thermal paste and applied it. temps are now idle at around 40. At load 65-70. However, when running prime95 large fft tests core 3 and 4 fail with fatal rounding errors. Any idea how to fix this?
Edited by hcsepyon - 2/1/12 at 2:18pm
post #6 of 8
try cleaning and reseating your cooler and maybe change the thermal paste. Sounds like an issue going on here. Im running aggressive at 4.2 and have lower temps than you. Try turning speed step off as well as load line calibration.
Edited by hellphyre - 2/1/12 at 2:25pm
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by hellphyre View Post

try cleaning and reseating your cooler and maybe change the thermal paste. Sounds like an issue going on here. Im running aggressive at 4.2 and have lower temps than you. Try turning speed step off as well as load line calibration.

I reapplied paste, and speedstep and load line calibration are both set to disabled. I followed the guide posted a few posts above. What cooler are you using?
post #8 of 8
Get another fan and put it on the side of the case on the other side of the rad and have both pull air in.. May give you a drop in temp.. Also make sure your fan is running at 100% back when I had my i7-960, the h60 would be around 85c under full load at around 4ghz?

Also look at where your case is in the room.. Is it by a heater? Is the ambient temp in your room hot? Those are all things to consider and if you room was 10c cooler so would your computer.

You could also try increasing the multi to 23 and lowering the bclk...see if that gets a lower temp..
Edited by JMattes - 2/1/12 at 6:06pm
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