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Huge Difference in Opteron 165 Core Temps (2500mHz stock volts)

post #1 of 16
Thread Starter 
What the hell is going on here? I've re-seated the AC64pro 2 times now to ensure I didnt screw it up, and its making awesome contact, its clamped pretty damn tight down onto the chip, Ive got amazing airflow, yet core1 still is being raped by the heat?

I have 3 options here:
give up on overclocking and keep it here (haha oh wow, not likely)
RMA the chip to AMD (is it defective, seems like it to me)
Lap the IHS or maybe remove it entirely. (yikes!)

Here is both at idle:

about a 10C difference

and here is Core0 at full load LARGE FFT torture testing on prime95, while core1 stays idle.

At least a 10C difference, up to 15C with fluctuation... its sickening and wrong
    
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post #2 of 16
My E6600 does the same thing. One core loads at 51c, the other 48c.

Maybe the AS5 is just giving better heat transfer over one core than the other?

I really cant be bothered to remove my BT to look. To get it tightened in properly i have to remove the mobo from the case -_-'
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post #3 of 16
everything seems fine why are u complaining ?
    
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post #4 of 16
Thread Starter 
yea but 3C is slightly more normal than 10C in difference. I pray to Raptor Jesus Core Temp is mis-reporting, but not many people have discredited the K8 detecting in core temp, it seems pretty solid for a BETA (more solid than speedfan anyways, ugh)
    
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post #5 of 16
Thread Starter 
Why am I complaining? Why am I complaining? At stock volts, a mirror-finish AC64Pro, ambient temps of 32-35C, only overclocked to 2500mHz core1 runs into TCaseMax already...
is why I am complaining.
A core0 temp of 45 and a core1 temp of 50 would be more 'normal' I would think.
    
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post #6 of 16
Quote:
Originally Posted by DontPassTheFence View Post
What the hell is going on here? I've re-seated the AC64pro 2 times now to ensure I didnt screw it up, and its making awesome contact, its clamped pretty damn tight down onto the chip, Ive got amazing airflow, yet core1 still is being raped by the heat?

I have 3 options here:
give up on overclocking and keep it here (haha oh wow, not likely)
RMA the chip to AMD (is it defective, seems like it to me)
Lap the IHS or maybe remove it entirely. (yikes!)


Here is both at idle:
about a 10C difference

and here is Core0 at full load LARGE FFT torture testing on prime95, while core1 stays idle.
At least a 10C difference, up to 15C with fluctuation... its sickening and wrong
First of all, where does one get that program? I will install it and see what my two cores rate at.
Now, what direction in the case does your AC64 exhaust point?
How are your AS5 application skills? Maybe too much AS5?

EDIT: Actually....okay I found the download for the program, haven't used it yet, but what I have found is that you aren't the only one with temp differences like this. Pretty sure Its not a defective chip issue, there would be alot of defective cpu's if that were the case. I'm of the opinion its a software issue, and or sensor reading issue. RMA isn't the answer.
Remember, its still a beta release.
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post #7 of 16
My 3800 is doing that also but thats just cuz I took off the IHS. You might RMA it but dont take your IHS off! Voiding your warranty sucks making you buy a new processor if you screw up(like me)
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post #8 of 16
Thread Starter 
Well after more and more testing (clock speeds are down to 2250 which is 250x9 effectively, running one-to-one with the ram now for delicious DDR500 speeds.

Same temps, across the board. Ill try and lower the voltage tonight when I get home, but I am not expecting miracles. Maybe Ill keep this thing on the low-clocks until I watercool it just to be safe?

Although this is still annoying me... I got this chip for the sole purpose that it 'usually hits 3gHz on air' - which is an awesome thing to be able to say. But to be hitting TCaseMax at 2250 (can speedfan, core temp, AND everest ultimate edition all be reporting wrong at the same time?)

Ill also swap the AcFreezer (which has the fan towards the RAM, sucking air from the front of the case through the fins to the back of the case where my 2x120mm Antec Tri-cool fans blow the hot air out of the case. (Ill take some pics tonight as well and maybe MSPaint a tiny diagram)

Ill be swapping the AC64 for the stock 4 heatpipe cooler than AMD gave me with the cooler, and Ill even use the lame ass paste that comes with it! Then lets have AMD try and tell me its 'because you used an improper cooler with unknown thermal compound' Which I know is complete ****ing bull****, my AC64 + AS5 is far superior to some doofy AMD stock cooler, even if it has copper glued to it.

Although the fact that the IHS of this chip is INCREDIBLY concave is probably working against me. (its off by more than 2mm according to my extremely accurate micrometer)

Im definitely going to lap it (since RMA`ing is a crappy idea anyways, I was just throwing it out there)

Hopefully Ill have a breakthrough tonight, guys.
    
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post #9 of 16
Two reasons this happens:

1. Something is not flat. Either the HS is not seated properly, or either the IHS or HS base is concave/convex. Lapping/reseating helps this.

2. Thermal paste is skewed to one side. Make sure you spread out a very thin layer, very evenly.
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post #10 of 16
Thread Starter 
What really bugs me is we spend anywhere from 100 to 500 dollars on ONE SINGLE PROCESSOR would it kill them to make the stupid-assed IHS close to flat? and maybe just copper, sans zinc coating. Back in the day of socket-A we didn't have no fancy assed heat spreader doo-dads on the processor, you slapped that heatsink down on the BARE CORE and you liked it XD

Nowadays if you do remove the IHS (as I found out with the venice chip Ive got now that is nearly worthless) you have to make your own mounting bracket, or modify the existing one to even have a chance at the heatsink coming in complete contact with the now-naked chip.

    
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