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[SB 2500k] When/why should I up QPI voltage?

post #1 of 6
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Sitting at 4.7 @ 1.38v 8 hour prime95 small fft stable, trying to work on the memory now.

Stock memory settings:
1600 9-9-9-24 2t @ 1.5v

I'm failing at:
1866 9-9-9-24 1t @ 1.612v

Should I up dram volts or qpi (I understand qpi controlls the IMC)
    
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post #2 of 6
I don't think there's a QPI voltage on my UEFI.

Unless it has some other name. I still haven't got around all corners of it
Son of a Bridge
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post #3 of 6
On Asus its VCCIO.

I may have that off by a letter but you get the idea

You could try more dram voltage or 9-10-9

sent from tapatalk on android
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post #4 of 6
Quote:
Originally Posted by lightsout View Post
On Asus its VCCIO.

I may have that off by a letter but you get the idea

You could try more dram voltage or 9-10-9

sent from tapatalk on android
Yeah, I have that voltage there

Thanks man, now I know what it does. Does it only affect the IMC? What's a safe value for it?
Son of a Bridge
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post #5 of 6
good luck LOL...

These CPUs/p67 board dont really seem to overclock like we are used to... They are either stable, or unstable.

I tried getting my corsair pieces to run at 1866, but after wiping a few OS's in the process i just gave up. I would say you best bet is to up your dram to 1.6-1.65 loosen the timings to 9-10-9-27 2T and increase your VCCIO to like 1.15 and see if it boots.


Quote:
Originally Posted by PanicProne View Post
Thanks man, now I know what it does. Does it only affect the IMC? What's a safe value for it?
1.1-1.2 max..... 1.2 is really only needed to stabilize at over 5GHz
    
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post #6 of 6
Quote:
Originally Posted by PanicProne View Post
Yeah, I have that voltage there

Thanks man, now I know what it does. Does it only affect the IMC? What's a safe value for it?
I'm not sure of the safe values. I just was told this is qpi on these boards. I haven't really felt the need to mess with it.
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550D
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