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Phenom quad 955 heat issues

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December 22, 2010 3:20:47 PM

Swapped out a phenom 560 with a 955 as an upgrade (giving my 560 to little bro for his comp) and I noticed it was running pretty hot. Just in the bios it was reading 35-40c. Booted into windows and as it was loading I could hear the cpu fan speeding up to where it pretty much sounded like a jet engine. Opened HWmonitor and it was reading 58-59c, just at idle.

So, I pulled the heatsink and cleaned off the paste that came with the cooler and applied some AS5 paste. Stuck everything back together with no improvements. Took off the heatsink about 4 times and tried different methods when applying the paste (the credit card/razor method, just a blob the size of a grain of uncooked rice in the middle, and a few other ways) but still high temps.

I am using the stock cooler, and I know that those are usually garbage, but I'm not looking to overclock, and this one actually seems decent; it's got these copper tubes going through it and what not.

I eventually undervolted the CPU to 3.0ghz, opened the side case and stuck a fan right in front if it. That lowered the temp to 55 C (at idle) and the CPU fan slowed down a ton, making it pretty quiet.

What's funny is that, at load, it only goes to like 59-60 C, but with no programs going, it's 55-56 C. :??: 

So my question now is: is the heatsink really garbage, and should I just get a new one, or is this a problem with the CPU itself, and should I just return the thing? OR... is this just a normal operating temp until the paste "cures"?

Comp specs if needed:

Asrock 870 extreme3
Phenom 955 quad
4g ddr3
galaxy 240 gt
320g seagate hd
430w thermaltake psu

As far as case/cooling goes: The case is a no-name brand I got online, but I've got a 120mm fan drawing air in front from the bottom of the tower, exhaust fan on the back, and one on the side of the case right above the vid card, and another on the PSU.

My 560 phenom never got above 45 C at load (with the 3rd core unlocked, and with stock cooling), so I don't think it's a cooling issue with the case.

Thanks, and sorry for the gigantic post. :D 
a b à CPUs
December 22, 2010 4:00:39 PM

Your temps are really strange, and at load only 5 c difference-
Well, make sure you rub off all paste w alcohol/or similar , there shouldnt be any remaining, then re apply some new quality paste-


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a b à CPUs
December 22, 2010 4:00:51 PM

Do you have cool'n'quiet enabled?

If you have CPU-Z or Speed-Fan, check the voltage it's reporting for the CPU. If you don't have either, get them.
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December 22, 2010 5:57:13 PM

55Range said:
Your temps are really strange, and at load only 5 c difference-



I know, that's what I was thinking too. You figure with idle temps that high, it would reach 70 c under load and just shut down, but no, it caps at 60 for some reason.



zergesys said:
Do you have cool'n'quiet enabled?

If you have CPU-Z or Speed-Fan, check the voltage it's reporting for the CPU. If you don't have either, get them.



Cool n' quiet is enabled, and I think the cpu voltage is at 1.350, but I'm not 100% sure. I will check when I get home though and post back here.
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a b à CPUs
December 22, 2010 6:15:15 PM

If cool n quiet is enabled you need to set your cpu voltage at auto so it adjusts that also.

60C under load sounds alright but as mentioned 55C idle not so good.

Have you checked your cpu loads when idle with somthing like coretemp, sounds like its working on something.

Sounds like you are applying paste ok, if that was the prob I would expect the load temps to rocket, I use the small grain of rice unspread method.

Stock coolers aren't great and I've known some 955's to be a bit warm but it should be fine for general use.
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a b à CPUs
December 22, 2010 8:34:50 PM

Your CPU voltage is too high, set it to 1.20-1.24V. If the temps are still high do what 55range said.
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a c 111 à CPUs
December 24, 2010 12:52:09 PM

mosox said:
Your CPU voltage is too high, set it to 1.20-1.24V. If the temps are still high do what 55range said.


Sorta-kinda this.

PhIIs tend to over-volt and motherboards add to the pain. I consider 1.325v as stock but it's really more of a ""range"". 1.25v to 1.325v is about average. It would have to be a special PhII to run 1.2 to 1.25 volts (but it can be done).

I've unlocked and clocked a PhII at 1.85v but most won't go there. It could have been dropped further but my low-end volts were below 0.85v with C&Q, and it would throw errors responding to load or coming out of sleep.

And Just Throwing This Out There: I like Thermaltake but I thinks yer Purepower 430w works really best at 200w load or so. I'm guessing you are in the 250w range (with 70w for the 240).

That 430 can deliver good power up to 280w, really, BUT all the load is being pulled through one 'rail' and the motherboard wants to deliver the goods to a 125w CPU. If something else is tugging on that rail you might have a little volt war going on.

The 955 at 'stock' volts will be pulling 10 amps - more if it is a little over-volted.
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December 24, 2010 7:28:45 PM

Ok, checked the volts and it was set at 1.325v. I turned it down to 1.275v and the temps dropped, which was suprising. I'm watching the temp now and it's 49.5 C at idle, if I open WoW and a few internet tabs, it goes to about 53-55 C, so I guess I'm happy with that. It's better than 56c at idle, and the fan is sooo much quieter.

I didn't even think about the PSU...doh
That could also be an issue. I went to the newegg PSU calculator, and with my specs, they recommend 412w, so I'm pretty much right on the limit. I don't know how many watts a typical 80mm fan takes to run, but having 2, plus a giant 120mm fan in the front probably takes some power to run.

Plus, this is the 3rd computer build I've had this PSU in, so it has some age, and there's some nice hot air coming out of the back of it right now... lol

I'll probably be making a newegg purchase soon, grab up a psu, cooler master 212, and maybe even a 5850. :D 

Thanks for all the help on this, hope everyone has a good X-mas!
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