Asus P8Z77-I Deluxe Overclocking + 2500K

LEK-89

LEK-89

LEK-89

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Leicester
Hi 8 Pack/guys,

I've recently moved to Mini ITX and I have gone with this board, however it is the first Asus board I have ever owned and therefore I have never overclocked on them before!

I've had a good look in the BIOS tonight and I have currently only changed the following settings to attempt a 4.5Ghz overclock (bearing in mind that I may be pushing my luck here, as I could only get 4.4Ghz out of my 2500K on my old MSI Z77 Mpower board):

CPU ratio - 45
CPU Vcore - 1.310v
CPU Load-line calibration - high
DRAM frequency - 1600Mhz
DRAM timings - 9-9-9-24 (though I'm not sure if I should leave it set to auto which is 9-9-9-27?)
DRAM voltage - 1.5V
DRAM command rate - 2T
CPU spread spectrum - disabled

As mentioned, the following settings above are the only things that I have changed. Everything else is still untouched / set to auto. I'm going to run a Prime test tonight to see if 4.5Ghz is stable.

Could you give me any tips as to what else I should change in the BIOS to help towards a stable overclock? Oh yeah even though that Intel SpeedStep is enabled and the computer clocks down the CPU to 1.6Ghz when idle, the vcore still remains at 1.31V or 1.304V - do you know why this happens?

Many thanks! :)

Liam
 
The reason the voltage does not drop is because the voltage is set at a fixed amount. I believe this can be avoided if you use the offset voltage control however I know that most MSI boards don't support it, not sure about other manufacturers.
 
Thanks for clearing that up about the fixed voltage guys. I've never done offset overclocking though, is it a better method to use rather than fixed voltage overclocking?

Thanks - Liam
 
8 Pack said:
Nope!! I use fixed voltage more often than not. I think its the more stable way to go.
Click to expand...

Thanks 8 Pack :)

How does my overlocking spec look in my original post? Is there anything that you can add to it? Just a quick update as well - with a 1.31v vcore, I'm failing to even get a stable 4.4Ghz :(

Liam
 
CPU spread spectrum should be enabled. And offset is good if you want to use the speedstep feature to downclock and downvolt the cpu when idle. Just find the required vcore, turn on offset, see where the volts go to and adjust the offset until you reach the vcore you gained stability on.
 
I cant remember the exact reason why it should be enabled for better clocking. As you can imagine I read up on SB along time ago now. The info in the first instance came from the Bios engineers at ASUS through extensive testing with reasons behind it.

All I can remember is to get the top clocks SB spread Spectrum is enabled and on Ivy disabled.

Using AUTO is enabled.
 
8 Pack said:
I cant remember the exact reason why it should be enabled for better clocking. As you can imagine I read up on SB along time ago now. The info in the first instance came from the Bios engineers at ASUS through extensive testing with reasons behind it.

All I can remember is to get the top clocks SB spread Spectrum is enabled and on Ivy disabled.

Using AUTO is enabled.
Click to expand...

Furry muff i will have to try it enabled and see if it lets me lower my vcore as i need a big jump on voltage going from 4.8-5.0ghz. I can run 4.8 at around 1.33 but need 1.424 for 5.0.

Does it affect memory at all?
 
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