nForce 790i SLI/Ultra chipset mobos - Reviews/OC/Guides

[slim142]

Thx slim142:

I'v been trough most vtt from 1.1 to 1.35 with gtlvrefs from 0 to -0.40. And then different values for ref 0 and ref 1. Best so far is -0.1 and -0.5 with vtt at 1.35

Using the mem at 1.95 for 24/7

Tried 8-8-8-25-2T and the freezing in cod4 wasn't changed.

And 3DMark vantage has been on loop for quite some time now, no problems at stock resolution. Is there a way to increase pcie stability?

Try leaving VTT at 1.20 and start lowering your GTLrefs. I see a lot of prople with VTT at 1.20. You can also check what are the voltages 5010 and tekjunkie are using to see if that helps you in something.

If you say you are still having trouble, then I recommend you run memtest86 in DOS and run 2 standard tests and 10 times test#5 to see if there is a problem with your RAM sticks, if there is, RMA them or try another kit?

Best estability for pcie is to leave them at 100.

EDIT: Hey hifiking, try this

QDR/RAM=(your RAM speed) Unlinked
PCIE1/PCIE2 = 100
SPP<-> MCP= Auto
vCORE= (your vcore)
Loadline =Enabled
vTT = 1.28
PLL=Auto
vDIMM=(Manually put the stock voltage and timings for your ram)
vSPP =1.46
vMCP = 1.55
CPU GTL_REF0 = -29mV (this is from a qx9650)
CPU GTL_REF1=-32mV (this is from a qx9650)

You might also want to try different RAM speeds like 1650 instead of 1600, or 1605, 1610 etc
Also, I would try increasing your vcore (REMEMBER, DONT go higher than 1.38-1.40 ok?)

Yes it certainly exists.

From Anantech

Didnt really notice that, but are you guys messing with it?

Tried between 1.20 and 1.36, all go and freeze mid game.
Although later today i might go start playing even more with them. Someone said lower VTT voltages for 45nm help so i might do the whole range of tests - every gtl ref voltage that will boot with every available VTT between that range (wow thats gunna take some time, but its really all i can do).

It certainly does help in many cases.

@ everybody

I recommend you check your RAM sticks with memtest86. I know most of you dont use floppies anymore but this utility is really helpfull so you dont run the risk to BSoD or corrupt anything on windows.