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i7 870 running HOT!

post #1 of 19
Thread Starter 
Hi guys,

I picked up an i7 870 for pretty cheap (£190 = ~$310) as it was marked as "ex-display", which apparently just means the box had been opened.

Well, with the stock cooler it's running hot.

When I first switched it on, I went into the BIOS and saw it at about 55'C and going up a degree every couple of seconds. That was crazy at idle so I straight away cleaned the crappy pre-applied TIM off and put some arctic silver on and then it was a steady 45'C in the BIOS. Still higher than it should be, but at least it was stable.

Now in Windows, it's nice and cool at idle - when just browsing the internet it's between 25'C and 30'C.

Then when I run it at load using Prime95, one of the cores will reach 95'C after about 20 seconds (with the others on about 90'C), then I scream and cancel it. A minute later and it cools back down to 35'C...

And this is with turbo switched off!

Any idea why this could be? I know everyone says the 870 stock cooler is crappy, but benches generally show it topping out at 80'C on a standard clock, so something else must be wrong here.

CPUID HWMonitor shows my voltages to be OK and I DEFINITELY installed the cooler correctly!

Thanks.
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post #2 of 19
I had that issue with mine. I bought mine at MicroCenter for 229$ just get any good aftermarket heatsing and bam! What i'd do just to be sure though is check if all the
pins are secure on the heatsink =D
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post #3 of 19
hhhhmmmm if its around 25-30 with normal tasks and the cpu is stock clocked and cooled or even mildy clocked i would say thats perfectly normal; my athlon runs at 23 doing normal tasks (internet, photoshop, word, email)so nothing to worry about that
now for the prime 95 that is running hot indeed i would immediately assume faulty paste or paste that cant handle high temps?
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post #4 of 19
Yes, check the pins on the stock heatsink to make sure it is fully seated
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post #5 of 19
Thread Starter 
Quote:
Originally Posted by JuStIn871;12475372 
I had that issue with mine. I bought mine at MicroCenter for 229$ just get any good aftermarket heatsing and bam! What i'd do just to be sure though is check if all the
pins are secure on the heatsink =D

Well now $310 doesn't seem cheap haha. Horrible UK prices frown.gif

Good to know that someone else had the same problem though - I've ordered a CM 212 Plus cooler so hopefully that will sort it out.

I was close to getting your H50 too, but heard that the standard fan is a bit naff.
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post #6 of 19
Thread Starter 
Quote:
Originally Posted by BadAssClocker;12475384 
now for the prime 95 that is running hot indeed i would immediately assume faulty paste or paste that cant handle high temps?

Yeah I wasn't joking when I said i screamed! 95 is my breaking point.

The arctic silver I used is about 5 years old, maybe that's the issue. But it seems fine on a low temp... really weird.
Quote:
Originally Posted by Voltage_Drop;12475411 
Yes, check the pins on the stock heatsink to make sure it is fully seated

Yeah, I checked the underneath of the MB and they look fine.
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post #7 of 19
I thought Silver was fine for 8 years or so? Or is that MX3 I'm getting confused with
post #8 of 19
Thread Starter 
Quote:
Originally Posted by LiFTed;12475627 
I thought Silver was fine for 8 years or so? Or is that MX3 I'm getting confused with

Yeah, I think you're right. But it depends on how you store it and everything.

The paste *looked* fine to me, not separated or anything. And the fact that it improved so much over the pre-applied TIM must mean it's fine.

Hmm. I also don't get why the idle temp is higher in the BIOS than in Windows. I've used Coretemp, Real Temp, SpeedFan and HWMonitor and they all show the idle temp as 25-30'C. And yet the BIOS shows ~45'C.

When you're in the BIOS, is the multiplier fixed, or does it reduce it based on load? If it's forcing it to run at 2.93GHz in the BIOS that would explain the extra temp there.
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post #9 of 19
It shouldn't be clocking down for the BIOS.

As for the temperatures in Windows, I'd say Windows isn't reading the data right, much like my Phenom II X6. It's always 10c lower in Windows than in the BIOS :|
post #10 of 19
Just fyi when you are in the bios its not idle its at load.
    
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