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Unable to get memory past 1428 mhz

post #1 of 18
Thread Starter 
Hi Guys,

I have just started overclocking my 950. I first started by putting the multiplier of the SPD to 6x and just work on my bclk which I got to 178 on a 23x multiplier, which runs stable. Now I'm trying to get my memory multiplier up and I can't pass 1428MHZ which is on the 8x multiplier.
I have tried raising the QPI/VTT volts as high as 1.45V and still nothing, the computer will not load POST.

My current voltage settings are:
vCore: 1.35V
LLC: 50%
Dram Bus Volt: 1.65V
CPU PLL: 1.51V
IOH: 1.51V
QPI:1.25V (At the moment which is running stable)

Anything else I can adjust to get this going to at least 1600-1800MHZ?

Thanks!
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post #2 of 18
Thread Starter 
Also the timings are all on stock for now, still unsure where to head with those at the moment.
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post #3 of 18
timings?

list them please... you might need to change them, which version corsair gts?

btw 3x3gb? is that a typo... that doesn't equal 12gb
Edited by badatgames18 - 4/16/11 at 9:11pm
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post #4 of 18
Thread Starter 
Haha I knew someone would ask that, posted it too late.
Stock timings are:
9-9-9-25 1T
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post #5 of 18
try changing the timings to 9-10-9-27 1T

raise your qpi to 1.3v see if that posts...

from there we can tighten the timings if it does.. also increase your memory multiplier to 8x

EDIT: you might also want to increase cpu pll voltage a bit, that might be the problem

My 980x won't post with high speed ram if cpu pll voltage is too low

Edited by badatgames18 - 4/16/11 at 9:22pm
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post #6 of 18
Thread Starter 
Ok I tried running at those timings with 1.3V on the QPI also raised my PLL to 1.6V still no post.
Hmmmmm, this is of course running with the x10 multiplier on the RAM which brings it to 1784mhz.
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post #7 of 18
Quote:
Originally Posted by cakes View Post
Ok I tried running at those timings with 1.3V on the QPI also raised my PLL to 1.6V still no post.
Hmmmmm, this is of course running with the x10 multiplier on the RAM which brings it to 1784mhz.
it doesn't matter. Those GT's should be able to do 1800mhz atleast... something might be wrong, have you tried increasing your dram voltage slightly?
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post #8 of 18
Thread Starter 
When you say slightly you talking 1-2 notches? Cause I've raised it too 1.68 and still no post...dodgy ram you reckon?
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post #9 of 18
Quote:
Originally Posted by cakes View Post
When you say slightly you talking 1-2 notches? Cause I've raised it too 1.68 and still no post...dodgy ram you reckon?
yes... no way GT's can't post at those speeds... what is the rated speed of the dims? The Gt's i found were rated for 2000mhz off the bat (try running memtest for a while to make sure they're not defective)
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post #10 of 18
Thread Starter 
Yeah these ones are rated at 2000mhz...I'd be pretty annoyed if they are dodgy since i've had them for a few months already and would be hard getting them replaced...

I'll run memtest on stock settings or on the 1428mhz clock?
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