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Hexacore block

I

Inaba

Gawd
Joined
Sep 26, 2004
Messages
642
Hey folks... got a question that maybe some of you can answer.

I've been water cooling for going on 6 or 7 years now I think, but I've not run across this issue before.

I have an i7 970 hexacore proc... and an older Koolance CPU-340 block that has served me well, or at least adequately for awhile. However, I notice with my hexacore that cores 1 and 6 run hotter than 2 and 4 which run hotter than 3 and 5. Is this just inherently a result of having 6 cores or is it because my WB isn't cooling the outer cores as much as it should be?

Do I need to look into another CPU block more suitable for a hexacore? Is there a cooling profile that is that much different between a quad core and a hexacore that I need a different block?

Any advice is appreciated!
 
How does your cpu temp look like?
Short and simple. The load will never be spread equally all the cores. Some will run hotter. Then go in the bios turn off eco. If that's on the cores doing nothing will go into energy saving
 
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The temps are fine... 65-66 under full load and 32-44 at idle.

Even when the CPU is 100% loaded across all 6/12 cores, the temp spread remains the same - the outer cores at full load are at 65 or 66 while the inner cores are a lower temp, all the way down to 55. It seems like it should be the other way around, if there is a difference. This is what lead me to believe that perhaps my waterblock was unsuitable for a 6 core CPU.

When you say turn off eco, what do you mean? What setting are you referring to? It seems that you'd want to turn on something like "eco" to turn off the cores doing nothing. However, I have the thing overclocked to 4.1GHz... it's not like a 920 that's easy to overclock, I had to do a lot of tweaking to get it to be stable at that speed.

But the temp spread maintains even at stock speeds, which is why I didn't mention that fact that it's overclocked.
 
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I wouldnt worrie about it. I was using the old 330 koolance block the one that wasnt even beveled on the edges for my i7 920 @ 4.0ghz and was getting the same temps as you. Mine was doing the same thing had 2 cores that were 4-5c lower then the other 2. Im finnaly going to upgrade my block for my sandy bridge build. Going with the new 370 koolance block.
 
the IHS or the water block are probably slightly convex, which would explain the lower temperatures in the center and higher on the edges. if you cranked down a little more on the mounting screws i bet the temps would come down very slightly.
 
Unfortunatley, the Koolance block I have is a spring loaded variety, so they are cranked to the maximum extent.

I didn't have any problems on my quad core 920, this particular issue only cropped up in the hexacore. Since I don't have any other hexacores to compare it to, I was wondering if it was inherent in all hexacores that the inner cores cooler than the outer cores. In either case, it seems the temperature gradient is a bit extreme, so that's what lead me to question whether or not the block was not cooling adequately on the outer edges.
 
imagine you drew a line around all the cores on a CPU.
on a 4-core CPU, only two sides of the square have a core next to them producing heat.

on a 6-core CPU, the four cores on the outside corners have the same number of sides facing another core, but the center two are surrounded on 3 sides, so it only makes sense that they are going to be hotter just because they are more enclosed by heat-producing areas.
 
My 2600K operates at about 57-63C at full load and idles 30-36'ish.

Thats at 4.8 1.42v
 
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