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Enable Vdroop or Not...?

P

palladium

Senior member
Hi all,

I'm trying to push my CPU ( sig) a little further now that Gigabyte has partially fixed the cold boot issue with 12GB RAM. However, the only stable, cold-bootable BCLK above 150 for me is 165 ( 21*165=3.45GHz).

At 1.15V ( BIOS) I get BSOD whenever I start P95, but managed to get it stable ( by that I mean not getting BSOD) at the same Vcore if LLC is enabled. I've read from AT and the sticky post that LLC *can* be bad for your CPU ( I'm guessing not in my case since my Vcore is way below stock), however I'm not sure about this. Should I keep LLC enabled, or disable LLC and raise Vcore to whatever it's stable ( i'm guessing around 1.17V - my chip needs 1.12V at load to not get BSOD). I'm running P95 as i'm typing this, and 2 hours into it I havent got any errors while temps were hovering around the 72C mark. Stock Vcore is 1.26V.

My board is GA-EX58-DS4, am using 6*2GB DDR3-1333 @9,9,9,22. All other voltages are set to stock values. Using stock cooler - not gonna get a TRUE until the cold boot issue is fixed completely.

Any advice would be appreciated.

Thanks

 
I have a somewhat similar setup to yours (look in my sig). I'm currently OCing mine to about 3.6Ghz (3.8 with Turbo) using auto settings except on my RAM. Everything I have read has said that Load Line Calibration should be left on, especially while OCing. I don't know if that's just for the i7s. It certainly seems to stabilize the voltage. As long as you keep your vcore under 1.375, you are within Intel's specs, I believe.
 
I think it is important to understand what Vdroop is before you make your decision:
-Vdroop enabled: you are setting an upper bound for the CPU Voltage. At any given time, the V will not exceed the CPU V set in the BIOS.
-Vdroop disabled: you are setting a lower bound for the CPU Voltage. At any given time the CPU can spike anything above the CPU V set in the BIOS.

Now with this said, at first I had Vdroop disabled, Intel SpeedStep disabled, and CxE disabled on my Computer. I only did this at first for stability testing at my desired over clock. After I ensured stability I enabled Vdroop, enabled Intel SpeedStep and enabled CxE (Auto).

I added .07V extra to my CPU V when I enabled Vdroop. In reality I probably could get away with less. At load the CPU V was the same when Vdroop was enabled or disabled, ~1.33V. But I set my CPU V to 1.3565 because I wanted to give it a little headroom and it is still under spec, under 1.375V. The important part is that now I have set an upper bound to the CPU V. In theory this is to protect the chip from getting too much voltage from a spike.

If I am wrong about something, please let me know, but this is what my research has found.
 
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