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Intel DP67BG IMC voltage question

post #1 of 7
Thread Starter 
I have 4 things in the bios, I was told to adjust the IMC voltage to 1.21 in the bios to make overlcocking more stable with 4 sticks of ram (16gb total). Motherboard is DP67BG with 2600k cpu. I have 4 things in the bios, not sure which is the integrated memory controller voltage setting.

PCH Core (V) - 1.05
Processor System Agent (V) - .9250
Processor I/O (V) - 1.05
Processor PLL (V) - 1.85

If someone could provide a description of each of these that would be awesome!
post #2 of 7
i think it would be "i/o" i'd wait for some more confirmation though
..or use google-fu bruce.gif
 
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Thuban Powah!
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post #3 of 7
Thread Starter 
Yea I was thinking it was either the PCH Core (V) 1.05 or the Processor I/O (V) 1.05 but I'm not sure which to bump up to 1.2
post #4 of 7
Processor I/O would be what your wanting to change. Otherwise known as QPI/VTT or now with Sandy Bridge boards(VCCIO). Default for that value is 1.050v. I would try using 1.150v first. 1.21v is the maximum you would want to try for 24/7 settings. I use 8gigs 4 x 2gb sticks @ 1866mhz and I use 1.150v on my I/O voltage. Sometimes too much will be unstable also, like 1.150 works but 1.175v doesn't. You should check what the actual voltage is after you set the value. On my M4E, if I have it set too 1.150v , it's actually running about 1.161v.

Hope that helps some biggrin.gif

Leave PCH at 1.050v unless you have more than 1 gpu. If your running sli, then you would want like 1.125v for 2 gpu's and 1.175v for 3 gpu's.

Also, Try lowering your Cpu PLL voltage down. 1.800v is default. Most of us find 1.700v more stable and some down too 1.550v. I use 1.700v and it's rock solid and it shaves a couple degrees off your temps.

NEVER TOUCH SYSTEM AGENT. LEAVE THAT ALONE!!!
Edited by Hambone07si - 1/27/12 at 10:31am
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Red X9
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post #5 of 7
Thread Starter 
AWESOME! THANKS!
post #6 of 7
Thread Starter 
What does the CPU PLL setting the voltage for?
post #7 of 7
it doesn't' do much, you can try lowering it to help with heat.
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