PizzaMan

Guess, I'll just have to be happy with 1300Mhz @ 5-4-4-10 w/ 2.45v

Bench running only though. Board doesn't want to run over 1100 24/7.

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GTL testing and tweaking for all 7 series nVidia boards

CL3P20

You try playing with the tRRD and tRFC levels? Or how about lowering the SPP clock with high RAM freq?

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PizzaMan

Lowered tRFC to 50. tRRD is untouched at 5.

So I should try a lower QDR?

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GTL testing and tweaking for all 7 series nVidia boards

GeforceGTS

lol, I did the same thing when I had 750i FTW, just applied a little to much, rub a bit off..

CL3P20

I would try relaxing the tRRD to 6-7 ...not sure if Nvidia MCH's act the same way to tRRD adjustments as intel chipsets...but, other than CL its the single most important latency setting there is I'd say.

*Try running an Everest latency test before you change the tRRD..and again afterwards, to show the effect on your latency. If it does relax the latency ~2-5ns ...you might be getting somewhere. Pushing for higher RAM speed is taxing on the MCH, so relaxing timings [to keep overall latency withing a certain range] will be what gets you both more FSB and more RAM speed.

ie- the NB on my P45 Maximus, refuses to be stable at any timing/speed combination that results in overall latency, lower than 51ns...I get BSOD within seconds of loading Windows, regardless what the voltage to the MCH is..For daily use, I keep the latency ~55-60ns or so and I dont have to run insane amounts of MCHv to keep thing happy.

For me [and this mobo] I can accomplish this with a few different settings/combinations..like:

CPU multi @ stock [9]: 460mhz FSB/ 5:6 divider, RAM @ 1104mhz 5-5-5-16, tRRD- 7 = ~53ns

CPU multi @ 7: 540mhz FSB/ 1:1 divider, RAM @ 1080mhz 5-5-5-15, tRRD- 12= ~53ns

Both of the above settings require the same amount of MCH voltage to run stable, even though there are obvious differences between the speed in which the MCH is running [MCH @ 1:1 running 460mhz FSB and @ 675mhz running 540mhz FSB]....and the RAM, the overall latency is the same, so the load is not that different to the MCH.

*Sorry for the long explanation...hope it helps

__________________

..:Q6600 Club:..

INTEL 45

e8400: 5.13ghz
e7400: 4.5ghz
Q6600: 4.44ghz
8800GS@1028mhz
My photo albums