Increase DRAM clock, huge increase in CPU temps?

[lowfat]

When I generally overclock I find the max CPU clock, then raise my memory clock so rule it out as the cause of a lockup.

Was testing w/ memory @ 400MHz yesterday and I could have sworn CPU temps never went above 62C while @ 4.9GHz. Raise it to 667MHz today and temps are now hovering around 71C. There is no way my ambient temp has increased that much as it really isn't any hotter outside today.

So is this something that is true or no?

[enaberif]

I'd say perhaps your memory is dumping more heat near the cpu?

[ilya]

It's possible, but a 9c difference is pretty dramatic, something else must be in play. Did you check your memory controller voltage wasn't on auto? (I'm assuming it's a 2600k)

[lowfat]

Originally Posted by enaberif

I'd say perhaps your memory is dumping more heat near the cpu?

I actually lowered the memory voltage by .07V. So it should be putting out less heat.

Originally Posted by ilya

It's possible, but a 9c difference is pretty dramatic, something else must be in play. Did you check your memory controller voltage wasn't on auto? (I'm assuming it's a 2600k)

Pretty sure it is on auto actually. I don't think I've ever actually touched it before.

[Bond007]

i cant see memory dumping anywhere near the amount of heat required for that kind of temp rise

[Galcobar]

Chain effect? Memory produces more heat -- faster means hotter, so your voltage reduction might not have had enough effect -- and affects the efficiency of the VRMs nearby?

[zsamz_]

chek if your pwm getting hot
hotter it gets less stable voltage goes to cpu

it can be crappy memory controler

with my 2600k the higher i go the better temps get lol

[lowfat]

Originally Posted by Galcobar

Chain effect? Memory produces more heat -- faster means hotter, so your voltage reduction might not have had enough effect -- and affects the efficiency of the VRMs nearby?

Forgot to mention the CPU is watercooled. Memory or VRM temps shouldn't have much of an impact on CPU temps in my case.

[SKYMTL]

It is the IMC which is putting out more heat. You have to remember that while the CPU cores downclock when at idle, the memory runs at full speed.

[HTPC_Fan]

Yes, with the memory controller integrated, there will be more heat generated. Remember, dynamic power is proportional to the clock frequency and the memory clock has been increased by ~67% (from 400 MHz to 667 MHz).