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Surprised at how cool Sandy Bridge is...

post #1 of 20
Thread Starter 
So... kind of an embarrassing story, but it's necessary to illustrate my point.

Fired up RealTemp one day just for kicks and noticed the idle temps on my i5 2500k are kinda high (35-40~), and SC2 brought me up to 65~. Figured anything below 80 on load was okay, so I didn't give it much thought. OC is at 4.4ghz at this point.

A week (or 2) later decided to go for 4.8ghz just for kicks. Changed multi to 48 in UEFI and fired up Prime95 to test stability, then left to pick up some pizza at the local Papa Johns. Got home 30min later and saw 98C on RealTemp

So I turn off Prime95 and was trying to figure out what the heck is going on, then I realized that there is no air coming out of the back of my case...

Turns out that when I was upgrading my RAM 2 weeks earlier, I had accidentally unplugged the pair of AP-14s hooked up to my H50 . Both were attached to a Y-splitter, and the 3pin had come loose from the motherboard. The tube on the H50 got soo hot lol.

Now I'm running at 4.7ghz stable, max 77C

Anyways, TL;DR - Sandy Bridge runs cool.
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post #2 of 20
Lol, awesome man.

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post #3 of 20
I hit 90C+ within 1 min at 1.5V+ trying for 5.3GHz. Eventually settled for 1.464V at 5.1GHz for 86C max temp. When I ran it at 1.344V at 4.8GHz it barely broke 70C.

What I love best: Idling at 24C.
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post #4 of 20
Thread Starter 
Quote:
Originally Posted by compudaze View Post
I hit 90C+ within 1 min at 1.5V+ trying for 5.3GHz. Eventually settled for 1.464V at 5.1GHz for 86C max temp. When I ran it at 1.344V at 4.8GHz it barely broke 70C.

What I love best: Idling at 24C.
Haha yea definitely, idle is awesomely low.

Seems like it takes not a whole lot to get to 4.6-4.8ghz on these chips, but 5ghz and above takes a lot more.

Btw, try a pair of Gentle Typhoon AP-15s, I bet you'll see at least 3C drop in load temps over your CM fans.
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post #5 of 20
Odd....

Ambient is 70F I get low 70c with a 4.8ghz over clock with 1.46 volts and this is on a 2600k and ap-15's.

I could possibly go up to 4.9ghz but not 5ghz as it requires a buttload of voltage 1.50 was the max i tried and still not stable.
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post #6 of 20
Quote:
Originally Posted by luvsan View Post
Odd....

Ambient is 70F I get low 70c with a 4.8ghz over clock with 1.46 volts and this is on a 2600k and ap-15's.

I could possibly go up to 4.9ghz but not 5ghz as it requires a buttload of voltage 1.50 was the max i tried and still not stable.
Is that 1.46V at load?
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post #7 of 20
Quote:
Originally Posted by compudaze View Post
Is that 1.46V at load?
That's what its set to in the bios.... I think i got a mediocre if not cruddy chip lol....I have llc on so it could be higher.
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post #8 of 20
Quote:
Originally Posted by ebolamonkey3 View Post
Haha yea definitely, idle is awesomely low.

Seems like it takes not a whole lot to get to 4.6-4.8ghz on these chips, but 5ghz and above takes a lot more.

Btw, try a pair of Gentle Typhoon AP-15s, I bet you'll see at least 3C drop in load temps over your CM fans.
Hmm, IDK...

This test shows 2x CM BladeMaster's are better than 2x GT-1850's:

http://www.overclock.net/air-cooling...ans-112-a.html

Plus I love the PWM on the BladeMaster's.
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post #9 of 20
Quote:
Originally Posted by luvsan View Post
That's what its set to in the bios.... I think i got a mediocre if not cruddy chip lol....I have llc on so it could be higher.
What does CPU-Z say when you're under load with Prime95?

With my P67A-UD3 I had to set it to 1.55V in bios w/LLC on to get 1.42V at load.
Edited by compudaze - 3/11/11 at 9:39am
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post #10 of 20
Quote:
Originally Posted by compudaze View Post
What does CPU-Z say when you're under load with Prime95?
1.428

1.452 not under load.

I always found that odd.
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