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2500k OC without the option to change Vcore?

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May 17, 2012 9:21:24 PM

I'm a first time overclocker, and working with a 2500k on a Gigabyte Z77-DS3H motherboard and 1600mhz 1.5v RAM.

Most of the guides I have read talk about changing the Vcore to help with stability, and my BIOS does not have that option.

My most recent attempt at overclocking turned out to have the following numbers. Do they sound alright?

This was after 10hrs of Prime95. Nothing got over 69C, and the Vcore stayed around 1.296, but flickered just above 1.3 a bit.

Clock Multiplier - 42 (4.2ghz)
CBLK - 100 CPU Vtt - 1.085v
CPU PLL - 1.865v
IMC - "Auto" - 0.94v
DRAM Voltage - 1.66v (it's weird, it wouldnt let me select 1.65v like a lot of guides suggest... only 1.66 or 1.64)

Anything look out of the ordinary here?
May 17, 2012 9:45:29 PM

DRAM Voltage should be 1.5V, not 1.65V.

~1.3V Vcore is alright, but you should be able to lower it a bit, also to help with temps.
That option has to be somewhere in the BIOS/EFI. Try a small negative offset and then test if it's stable.
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May 17, 2012 10:44:03 PM

molo9000 said:
DRAM Voltage should be 1.5V, not 1.65V.

~1.3V Vcore is alright, but you should be able to lower it a bit, also to help with temps.
That option has to be somewhere in the BIOS/EFI. Try a small negative offset and then test if it's stable.


I'm telling you, nowhere is there the option to change the Vcore or anything about voltage offsets. The only real values you can change are CPU Vtt, CPU PLL, IMC, and DRAM Voltage.

I will drop the DRAM to 1.5 and give it a try.
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a b å Intel
a c 137 V Motherboard
a c 110 K Overclocking
May 17, 2012 11:05:36 PM

I just took a look at the manual for that board and you're right. There REALLY doesn't appear to be a way to adjust Vcore (either manually or with offsets). That's insane... I've NEVER seen a non-OEM board that didn't allow for SOME kind of Vcore adjustment.
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May 17, 2012 11:44:50 PM

DJDeCiBeL said:
I just took a look at the manual for that board and you're right. There REALLY doesn't appear to be a way to adjust Vcore (either manually or with offsets). That's insane... I've NEVER seen a non-OEM board that didn't allow for SOME kind of Vcore adjustment.


Do you think that sticking with a 4.2ghz OC is prudent, since I can't adjust that at all?
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a b å Intel
a c 137 V Motherboard
a c 110 K Overclocking
May 17, 2012 11:51:52 PM

lawrenceboland said:
Do you think that sticking with a 4.2ghz OC is prudent, since I can't adjust that at all?


With the Vcore and temp that you posted, 4.2 is fine. It SHOULD be lower than 1.296V for 4.2, but nothing you can do about it, and it's not dangerous to let it stay there.
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