i7 920 overclocking thread

[falven]

Originally Posted by Patch

I'll be comparing apples to oranges a bit, coming from a different mobo with slightly different terminology, so take it with a grain of salt:

1) Your VTT seems a bit high for your Vcore and base clock. Try bumping that down. I haven't needed to use +200mV or higher until my base clock goes to the 210-215 range and my vcore's at 1.4 or higher.

2) I don't understand phase lock loop (PLL) voltage at all, but it seems to be a crapshoot parameter to change. Higher isn't necessarily better, but by laboriously trying different parameters it has allowed my to hit some higher clocks. BUT, higher clocks have not necessarily been helped by higher PLL. If you almost get a clock stable, you might try adjusting it a little to see if it helps.

3) You might need to tinker with your RAM. Some sticks really need the full 1.65 V to get their "default" speeds. Maybe relax the timings a bit. Or lower your multi and underclock it to see if you can get your CPU clock stable.

Thanks! i think i got it solved, i am running now at 21X180.0 = 3780 @ 1.34Vcore, 1.62 Dram, 1.30 VTT! Temps are 71, 68, 70, 62

[stargate125645]

What is a good voltage ID for a 920? Real Temp says mine is 0.96V or something very similar. If I am not mistaken, voltage ID is the tested voltage at which the processor runs at intended levels, so I find it hard to believe that this value is accurate.

Also, any help explaining my issues in this thread would be appreciated!

[laxrunner]

Originally Posted by falven

Thanks! i think i got it solved, i am running now at 21X180.0 = 3780 @ 1.34Vcore, 1.62 Dram, 1.30 VTT! Temps are 71, 68, 70, 62

You should try lowering your vcore, 1.34V is pretty high for 3.8ish. You should be able to run it around 1.25V at that speed, and it should lower your load temps. Also just go ahead and bump the dimm voltage to 1.65. It's not going to hurt anything but will definitely help stability if you're running a 2:10 multi on ram. QPI PLL voltage is related to the memory controller, if you're having stability issues due to your memory speeds, try bumping this up. I generally just keep it with CPU VTT for simplicity.

[zlojack]

Originally Posted by stargate125645

What is a good voltage ID for a 920? Real Temp says mine is 0.96V or something very similar. If I am not mistaken, voltage ID is the tested voltage at which the processor runs at intended levels, so I find it hard to believe that this value is accurate.

Also, any help explaining my issues in this thread would be appreciated!

There are no programs that can accurately read VID of i7 chips.

[stargate125645]

Originally Posted by zlojack

There are no programs that can accurately read VID of i7 chips.

Well that's a shame. That would explain why it is so low, though.

[jrharvey]

Originally Posted by stargate125645

Well that's a shame. That would explain why it is so low, though.

my CPU runs about 1V when everything is stock/default settings so im not surprised that yours says that.

[falven]

Originally Posted by laxrunner

You should try lowering your vcore, 1.34V is pretty high for 3.8ish. You should be able to run it around 1.25V at that speed, and it should lower your load temps. Also just go ahead and bump the dimm voltage to 1.65. It's not going to hurt anything but will definitely help stability if you're running a 2:10 multi on ram. QPI PLL voltage is related to the memory controller, if you're having stability issues due to your memory speeds, try bumping this up. I generally just keep it with CPU VTT for simplicity.

Thanks,
running at:
Vcore - 1.388
21 X 181.6 = 3812
QPI - 3267
DRAM - 1.62
VTT 1.29 (+150)

I tried following your advice to lower Vcore but i get BSOD during 5 intelburntest that reads "clock not recieved or whatever..." which from my past experience means it needs more Vcore, no?
Thanks for your help
+Rep

-Falven

[stargate125645]

Originally Posted by falven

Thanks,
running at:
Vcore - 1.388
21 X 181.6 = 3812
QPI - 3267
DRAM - 1.62
VTT 1.29 (+150)

I tried following your advice to lower Vcore but i get BSOD during 5 intelburntest that reads "clock not recieved or whatever..." which from my past experience means it needs more Vcore, no?
Thanks for your help
+Rep

-Falven

How do you have a multiplier of 21? I thought max for 920 is 20.

[{core2duo}werd]

Originally Posted by stargate125645

How do you have a multiplier of 21? I thought max for 920 is 20.

if i enable c-states in my bios i get a 21 multi also.

[stargate125645]

Originally Posted by {core2duo}werd

if i enable c-states in my bios i get a 21 multi also.

I have not seen said option in my BIOS. What does it do?