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what i hate about quads..

Gerard

Gerard

Gerard

Caporegime
Joined
18 Oct 2002
Posts
41,053
Location
Ireland
Putting up with this bs of 2 cores at this temp and 2 cores at that temp. I know its because theyre not "true" quads but from what ive seen of i7 which is a true quad things are just as bad with temps at load reaching upto maybe 10c difference between cores.

At the minute im priming my q6600, 2 cores at 75c and 2 at 67c. Bottom of the heatsink (true with 2 noctua 120's in push pull) is lapped, now it looks like the ihs needs a lapping as well. On my b3 i went through this and cant say i noticed much if any difference after lapping it, im sure this g0 will be no different. :rolleyes:
 
I have an overclocked Q6600 it runs at different temps, usually between 5 adn 10 degrees C difference between the cores. I use a Zalman flower thing to cool it, I guess it is caused by the weight of the cooler pulling downwards on the mating surface. A year or so ago, I turned the whole PC on it's side so the cooler was pushing stright down on the chip. The temperatures then ran at nearly the same temp. maybe a gegree or two different. My Q6600 happily sits at 3.2 GHz, and idles about the 35 degrees C mark, and peaks at about 65-70 degrees C when working hard.

To be honest, in usual use a difference of temperature really doesn't matter. The thermal cut off is 100degrees C. I use my PC for gaming lots so it spends most of its on time under a good degree of load at it is still going strong 18 months later.

Don't worry about it, it'll be fine and funky.
 
Gerard said:
looks like the ihs needs a lapping :rolleyes:
Click to expand...
You normally get the best results when both the heatsink and IHS are lapped.

Intel® Core™2 Processors are famous for their *wonky* IHS, it's good enough to run the chips at stock but the keen overclocker and overcooler will not be happy until its lapped! ;)
 
I dont see why your upset, who cares if the cores run at different temps, I've not looked at my temps for months, once your OC is stable why bother?
 
Ranger07 said:
I dont see why your upset, who cares if the cores run at different temps, I've not looked at my temps for months, once your OC is stable why bother?
Click to expand...

Its more the matter of 2 cores being what would most consider the "safe zone" under 70 c and 2 being mid way up into the 70's. Im able to squeeze almost 3.9 or so out of this but the 2 high cores are into the early 80's with the 2 lower ones being around 72c.
 
Gerard said:
Its more the matter of 2 cores being what would most consider the "safe zone" under 70 c and 2 being mid way up into the 70's. Im able to squeeze almost 3.9 or so out of this but the 2 high cores are into the early 80's with the 2 lower ones being around 72c.
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I don't have that problem thankfully.

I have 2 cores around 13C cooler than the other 2 but when I ran the Intel Burn Test as mentioned here the cores overall peak temperatures levelled themself out when running at stock speed and when being (slightly) overclocked!
 
My q6600 is the same, even after lapping to 2000 grit, 2 cores at prime load sit at 68'c the other 2 are at 62'c, ive tried washer mods and various ways of spreading thermal paste and it doesnt make a difference.
 
This is all based on the thermometers built into the chip however. The odds of these being precisely calibrated aren't great, since I believe their only intended purpose is to tell the chip when to throttle.
Main reason I think the two sensors may disagree, rather than the core temperatures differing, is that the cores are both strapped to the same piece of metal. One would expect the system to reach thermal equilibrium after a while, with the 'hotter' core warming the 'cooler' core up until they reach the same temperature.

I haven't found out exactly how the thermal measurement is done in these chips, if its somewhere in intels specifications it'll be a while before I do. Not especially light reading
 
Its not only quads with cores at different temps.
Just put my E8400 back in @ 4ghz and its idling at 31c & 39c, but running prime its 63c both cores.

*EDIT*
Just thought i'd add, it idles about the same at stock as well.
 
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Gerard said:
Its more the matter of 2 cores being what would most consider the "safe zone" under 70 c and 2 being mid way up into the 70's. Im able to squeeze almost 3.9 or so out of this but the 2 high cores are into the early 80's with the 2 lower ones being around 72c.
Click to expand...


Well this is a trade off for OC'ing, maybe consider watercooling?
 
hmmm guys. the 1 or 2 cores are higher thats because windows or a background app is using them core/s little. its impossible for all the cores to be the same temp.
 
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my quad has uneven temps too, 2 cores run about 5 c hotter than then other too. and 1 of those hotter cores is hotter than the other 3. so basically i have 1 core running at 72c, 1 core ant 70c, and 2 cores at 67c when running intel burn tester for 12 hours with portable fan heater aimed at front of case to simulate super hot weather.

now all i do is ignore all the other temps and treat my quad core cpu as a single temp figure. and i use the temp figure from the hottest core ignoring the rest.

thats the proper way to do it if your smart.
 
Gerard said:
Putting up with this bs of 2 cores at this temp and 2 cores at that temp. I know its because theyre not "true" quads but from what ive seen of i7 which is a true quad things are just as bad with temps at load reaching upto maybe 10c difference between cores.

At the minute im priming my q6600, 2 cores at 75c and 2 at 67c. Bottom of the heatsink (true with 2 noctua 120's in push pull) is lapped, now it looks like the ihs needs a lapping as well. On my b3 i went through this and cant say i noticed much if any difference after lapping it, im sure this g0 will be no different. :rolleyes:
Click to expand...

With watercooling I get +/- 2 degrees C difference across the cores. i7 not lapped.
 
I've lapped my Q6600 and my Ultra 120A heastink and I get cores 0/1 around 4 degrees higher then cores 2/3 (or it may be the other way round, can't quite remember)
 
Damn these temps!

3352540836_e19fbc0d89_o.jpg


;)

Cpu core is 1.4v btw - CPU-Z lies!

On a side note, the differential between the cores is annoying - but meh
 
IAmATeaf said:
I've lapped my Q6600 and my Ultra 120A heastink and I get cores 0/1 around 4 degrees higher then cores 2/3 (or it may be the other way round, can't quite remember)
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Really dont want to lap the cpu though, done it ages ago with a b3 quad and it took quite a while. Probably will end up doing it eventually. :o
 
life is way too short to get annoyed by this...

anyway, the IHS is stuck to the cores so if thats not even there's not a damn thing you can do about it other than try and pop the IHS which is apparently a very silly thing to do with C2D.

I'd very much doubt the cores are producing different levels of heat, its just that they are better/worse connected to the thing taking the heat away.
 
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