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i7 870: load temps high @ stock speed with Megahalems?

post #1 of 12
Thread Starter 
Hi,

I wanted to familiarize myself with stress testing and monitoring software before I attempt any overclocking so I launched RealTemp and Linx, set Linx to use ALL ram and run 3 passes and got these temps:

RealTemp
idle: ~27-32C (surely inaccurate but in line with others)
Load: ~69-72C max (yesterday I maxed at 65C but it was somewhat cooler in the room)

Now this is all at stock settings I haven't changed a thing in BIOS so the chip was running at 3.2GHz. The HS is a Megahalems (IC7 TIM) in a Silverstone FT01 case, all my cabling is out of the way and the case has 2 180mm fans @700RPM blowing in (one of them is directly above MOBO) and a 120mm @900RPM exhaust in back. The kicker is that I've a Noiseblocker 120mm @900RPM on the heatsink (blowing out to exhaust fan), originally I wanted a super quiet system at all cost hence the case and the low noise fans. I figured even with that I could get a very small OC going, the case is said to have good airflow in CPU area.. but I didn't expect 72C load with stock settings.

So, with little experience I am left wondering about the cause of the temps I'm getting. Is it the HSF? Or could it be bad application of TIM? Something else?

Admittedly the 900RPM Noiseblocker fan was overkill on the nosie front, I've the same fan in exhaust and I can't hear the damn thing unless I put my ear close enough to almost get it caught in the blades. Now I'm considering a Gentle Typhoon @1450RPM but I don't know how much difference that will make.

Please leave your feedback if you can, I'm not sure what to do right now.
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post #2 of 12
I think those temperatures are normal ,but what are your ambients. Also I have found sometimes the motherboard puts in a little too much voltage for stock speeds. For example if I wanted to run at stock speeds I could run it with -.100V of the one that my motherboard was setting at auto.
Edited by bom - 1/27/11 at 7:35pm
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post #3 of 12
Thread Starter 
I'm not sure what was going on yesterday, maybe it was the ambient temperature which I couldn't check because I don't have a thermometer around and I'm a bit sick so I'm not sure if it really was warmer. Anyway, my idles and load temps are pretty much the same as the first day I tested meaning 65C maximum at load (after 10 runs so far). Strange.

I've set LinX to run 50 times today to see what happens, maybe the heat builds up somewhere in the case after a long time or something. I was hoping to max at 60C, one of the review sites had 58C load at stock with a TRUE but I guess there are other variables.

By CPUz the core voltage is at 1.144v right now with 100% load, is this good? On occasion it spikes to 1.152v but not often and for a very short time.
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post #4 of 12
Try taking off the side panel to see if the temps drop.If they do,you have an airflow problem.Most likely you need a case with higher airflow.
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post #5 of 12
My 860 runs stock linx at 60c max using a cheapo Hyper 212+, I can't imagine you'd be seeing much higher. My guess is some auto OC feature got enabled in your bios; those features are notorious for using too much voltage which causes excessive heating. 3.2 is the turbo bump for a 870 (which I had wrong in an earlier version of this post, my bad).
Edited by *AcidBath* - 1/29/11 at 11:02am
post #6 of 12
those seem very high my mega could keep my i7 930@4ghz 1.24 under 74c in ibt.
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post #7 of 12
Thread Starter 
Ok you guys got it spot on, took the panel off and on average the chip runs 58C (load with LinX) just like the review I was going by.

I don't know how accurate CPUz is but last time I ran 50 runs with Linx the core voltage stayed mainly at 1.144v when I was checking up on it, today it's jumping up to 1.152 more often than staying at 1.144v but I don't think it's that big of a deal. About the 3.2GHz; yeah it's the turbo thing, I called it stock because I figure that's how it's meant to run at default.

So now I just have to figure out how to improve airflow without raising the noise too much, cabling is out of the way already but I can do a lot about the fan setup I have right now.

Thanks a lot guys!
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post #8 of 12
Quote:
Originally Posted by jid View Post
Hi,

I wanted to familiarize myself with stress testing and monitoring software before I attempt any overclocking so I launched RealTemp and Linx, set Linx to use ALL ram and run 3 passes and got these temps:

RealTemp
idle: ~27-32C (surely inaccurate but in line with others)
Load: ~69-72C max (yesterday I maxed at 65C but it was somewhat cooler in the room)

Now this is all at stock settings I haven't changed a thing in BIOS so the chip was running at 3.2GHz. The HS is a Megahalems (IC7 TIM) in a Silverstone FT01 case, all my cabling is out of the way and the case has 2 180mm fans @700RPM blowing in (one of them is directly above MOBO) and a 120mm @900RPM exhaust in back. The kicker is that I've a Noiseblocker 120mm @900RPM on the heatsink (blowing out to exhaust fan), originally I wanted a super quiet system at all cost hence the case and the low noise fans. I figured even with that I could get a very small OC going, the case is said to have good airflow in CPU area.. but I didn't expect 72C load with stock settings.

So, with little experience I am left wondering about the cause of the temps I'm getting. Is it the HSF? Or could it be bad application of TIM? Something else?

Admittedly the 900RPM Noiseblocker fan was overkill on the nosie front, I've the same fan in exhaust and I can't hear the damn thing unless I put my ear close enough to almost get it caught in the blades. Now I'm considering a Gentle Typhoon @1450RPM but I don't know how much difference that will make.

Please leave your feedback if you can, I'm not sure what to do right now.
well just to let you know my 870 @ 4.32Ghz idles at 38c and loads 72c , on default setting 2.93Ghz i idle under ambients and load 48c in cool weather .

you could of applied the thermal paste wrong ? you must draw a thin vertical line down the HS (recommended for i7's) and make sure your heatsink is tight against your cpu .. getting a gentle typhoon is the least of your worries =)

What cpu cooler are u using for ur 870 ? these chips get hot so you need decent cooling , the stock one is just rubbish throw that crap away .
Edited by Xristo - 1/30/11 at 5:11pm
    
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post #9 of 12
Thread Starter 
Quote:
Originally Posted by Xristo View Post
well just to let you know my 870 @ 4.32Ghz idles at 38c and loads 72c , on default setting 2.93Ghz i idle under ambients and load 48c in cool weather .

you could of applied the thermal paste wrong ? you must draw a thin vertical line down the HS (recommended for i7's) and make sure your heatsink is tight against your cpu .. getting a gentle typhoon is the least of your worries =)

What cpu cooler are u using for ur 870 ? these chips get hot so you need decent cooling , the stock one is just rubbish throw that crap away .
Those are really nice temps, I'm using a Megahalems as I mentioned earlier and it's down tight because the mounting system is pretty much fool proof . I'm not sure about the paste, I actually went with a dot under 0.5mm(smaller than the pea size or whatever food comparison everyone uses) and 4 smaller dots between centre and the corners.

However, after my last post I realized the 180mm top intake fan is directly above and like an inch from the big heatsink blowing down onto it, while its only about 700RPM or so it's massive and pushes a bit of air. On the heatsink I had a 120mm 900RPM fan pushing horizontally to the exhaust, so basically the fans were fighting against eachother a bit.

I dug out the old stock exhaust fan from the case and slapped it on for a push pull on the heatsink, while I was hitting a decent 58-60C with the panel off and 1 fan I'm doing 55C with the panel on and push pull setup. Things are getting better.. I've a few more things to try but I'm happy I got the bottom of the main problem here
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post #10 of 12
Quote:
Originally Posted by Xristo View Post
well just to let you know my 870 @ 4.32Ghz idles at 38c and loads 72c , on default setting 2.93Ghz i idle under ambients and load 48c in cool weather .

you could of applied the thermal paste wrong ? you must draw a thin vertical line down the HS (recommended for i7's) and make sure your heatsink is tight against your cpu .. getting a gentle typhoon is the least of your worries =)

What cpu cooler are u using for ur 870 ? these chips get hot so you need decent cooling , the stock one is just rubbish throw that crap away .
its impossible to idle under ambient.

op, i recommend you replace the fan on the heatsink with something that has higher static pressure and moves more air. a decent fan for that heatsink is the cooler master blade master. it is pwm so it will stay quiet when the chip is cool and rev up when the chip gets hot. it has really high static pressure and spins at 2000rpm. im using the same fans on my radiator right now in push pull with an akasa smart cable. if you do buy a cm blademaster make sure its plugged into the cpu header so your board can take advantage of the pwm feature.

edit: also for those posting comparison temps, temperatures mean nothing with out an accurate ambient reading. best way to check your cooling status is to get yourself a digital thermometer that takes readings every seconds or two and subtract the ambient from the load temp. this way your temps are measured in degrees c above ambient. the thermometers with a probe work best.

edit: here op check this out, study done by ehume. tests multiple fans with the megahalem. readings are done in degrees c over ambient.

http://www.overclock.net/air-cooling...ans-112-a.html
Edited by AliceInChains - 1/30/11 at 7:58pm
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