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Intel's response to Sandy Bridge Voltage - Page 6

post #51 of 86
Quote:
Originally Posted by grunion View Post
ugh 5ghz isn't gonna do it, peaked at 39786.



No idea
Try to see if you can raise your sticks to 2133. There was about a 3k increase in CPU physx score for me from 1866. That was on 3dmark 11 though I would imagine the same or about the same with vantage.
 
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post #52 of 86
Sandy Bridge people whats VTT called on your boards? I'm still stuck in Nehalem land.
post #53 of 86
Quote:
Originally Posted by nagle3092 View Post
Try to see if you can raise your sticks to 2133. There was about a 3k increase in CPU physx score for me from 1866. That was on 3dmark 11 though I would imagine the same or about the same with vantage.

Very possible, 1600 to 1866 gave me 1k.
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post #54 of 86
Quote:
Originally Posted by KBcobra View Post
Sandy Bridge people whats VTT called on your boards? I'm still stuck in Nehalem land.
IDK, but is it one of these
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post #55 of 86
Vtt(vccio)
    
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post #56 of 86
Do you need to raise that if you run higher ram voltage?

Is like the Uncore on 1366?
    
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post #57 of 86
Quote:
Originally Posted by grunion View Post
Very possible, 1600 to 1866 gave me 1k.
I can run 2133@9-10-9-28 (1.62v)
note;benches only
    
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post #58 of 86
Default VCCIO values should be good for up to 2133 RAM speeds. You should not have to raise it.
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post #59 of 86
Quote:
Originally Posted by BallaTheFeared View Post
Do you need to raise that if you run higher ram voltage?

Is like the Uncore on 1366?
"VCCIO: more commonly known at QPI/VTT voltage, this is the VTT voltage. Formally known as Processor Power for I/O it is the voltage for the integrated memory controller as well as the PCI-E controller. While Intel’s Maximum is 1.05 +/- 3% = 1.08v, you can go higher, much higher. I would recommend staying below 1.2v for 24/7 use, but depending on the quality of the IMC on your chip, I have seen 2133 MHz done on as little at 1.1v. I used 1.12v for overclocking my Dominator 1600 MHz to 1866 MHz, and it did it without any problems. Do realize that this voltage contributes heat as well to the whole thermal package. "
    
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post #60 of 86
Quote:
Originally Posted by KBcobra View Post
Does the within .5 rule still apply for VTT (Im sure there is a different name) and Vram? Nehalem and Sandy Bridge share the same 1.57v MAX for memory.
Last I heard, yes, VCCIO and VDIMM should be within 0.5.
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