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3930k one core too hot for 4.8ghz OC - can't set per core multiplier - Page 3

post #21 of 24
Thread Starter 
Yeah that freaks me out too. Skinee seems to have written a really thorough walk through so I'm gonna try. Hunting down one or even two used mcr120xp rads too if I can. I'll let you know how it goes. thanks again for all your help
post #22 of 24
There are several things that occur to me.

One is that 32GB of RAM is a lot for a heavy overclock - one of the Corsair guys made a comparison to a truck where CPU clock speed equates to the speed of the truck and RAM is the load - you can't do full speed with a full load.

Not saying it can't be done - I'm running a 3820 at 4.8 with 32GB, but it's harder than with, say, 8GB.

Next thing would be to re-apply the thermal paste you already have and try re-seating the water block. Mine is considerably cooler now than it was when I first set it up, but it took me three tries.

As I mentioned in another thread, get the Intel Performance Tuning Protection Plan which will cover a replacement CPU if you fry one while overclocking. It's $35 for your CPU, which would be money well spent!

Finally, I'm pretty sure the per core overclock is a bit of a red herring - I don't think you get to specify which core gets to slow down.

Hope that helps!
Dante
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i7-3820 Asus Rampage IV Extreme ENGTX560 TI DC2 TOP/2DI/2GD5 GeForce GTX560 Ti ... Corsair Dominator GT 
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Corsair Dominator GT OCZ Vertex 4 RAM Disk Pioneer BDR-2207 
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Dante
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7-3820 Asus Rampage IV Extreme ENGTX560 TI DC2 TOP/2DI/2GD5 GeForce GTX560 Ti ... Corsair Dominator GT 
RAMHard DriveHard DriveOptical Drive
Corsair Dominator GT OCZ Vertex 4 RAM Disk Pioneer BDR-2207 
CoolingOSMonitorMonitor
Custom Water Loop Windows 7 Ultimate LG IPS231 LG IPS231 
KeyboardPowerCaseMouse
Microsoft Sidewinder 4 Corsair AX850 NZXT Phantom Cyborg R.A.T. 7 
Mouse PadAudio
Yes, I have a mousepad. I know, I know, 32GB of... Whatever is on the motherboard 
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post #23 of 24
Thread Starter 
Thanks Simon I appreciate your input. I'll look into that RAM load concept, interesting stuff. $35 seems like a good investment to protect a pricey CPU too, I didn't know about that program. Seems very fair.
I'm a bit of a forum noob so have had trouble keeping my posts short but buried in there I mention I've tried remounting and turning which helped in general but not with my one pesky core. Definitely what the wise seem to suggest trying first when you see strange core readings. Thanks again.
post #24 of 24
Hi,

What the guy in the video you posted says is consistent with what I said - he is just very vague, and I think a lot of people misunderstand what this per core does. When Intel cores are idle, they can be basically shot down and the saved power presumably lets the frequency be raised for the remaining active cores. All cores see the same frequency (except those inactive and shut down). For locked processors, Intel has fixed frequency boosts with the boost value depending on the number of active cores (see the link below). One active core gets a higher boost than 2 active cores...etc. Don't forget we are talking about a turbo boost BIOS setting, not a processor setting.

http://www.intel.com/support/processors/corei7ee/sb/CS-032277.htm?wapkw=%28cs-032277%29

Now with unlocked processors, you can specify how much boost (the actual frequency is specified in the BIOS) 1 active core gets and what 2 active cores gets, etc. This is the per core frequency setting.

All active cores get the same frequency, the architecture doesn't allow for different frequencies on different cores (see the Intel faqs below "Is turbo frequency the same for all active cores in the processor?"

http://www.intel.com/support/processors/sb/CS-029908.htm
Edited by GeneO - 10/19/12 at 11:19am
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