Helpful Reply790i + 8GB Patriot Unstable need help!

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N4770F
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Re:790i + 8GB Patriot Unstable need help! 2011/06/20 20:17:40 (permalink)
I have a QX9770 at 4.05GHz on a 790i Ultra SLi board and 8gig of corsair dominator (TX3X4G1800C8DF) looking at post #30 all looks good but I'am at Multi. 9X/FSB 1800MHz/Mem 1800MHz/FSB Mem clock (Unlinked) and Mem ratio (Auto)/P1and P2 (Auto)/Memory timing (Expert)/Tcl (9) Trcd (9) Trp (9) Tras (26) Command Per clock (2T) -Advanced- Trrd (7) Trc (45) Twr (12) Twtr (18) Tfaw (35) Tref (Auto 7.7) Trfc (100) all manual but Tref. Voltages: Cpu (1.43v) Fsb (1.35v) Mem (1.95v) Spp (1.45v) Mcp (1.65v). For 8gig of ram you could run Spp at (1.50v) but found I did not need to and with one graphic card (1.55v) on Mcp is a little high but yes for two I run three GTX 480SC at Mcp (1.65v) as for the Gtlvref lane's they are correct. I read a while back that for 4gig of ram the Cas latency is (7) or (8) and for 8gig its (9). And there's and old saying if you run your FSB out of the green and into the red your CPU could be dead.
post edited by N4770F - 2011/06/20 20:23:47
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feniks
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Re:790i + 8GB Patriot Unstable need help! 2011/06/20 20:29:13 (permalink)
1800 MHz FSB is easily achieved at 1.25-1.30V on VTT (FSB voltage) by the way, at least with 8x multi, it shouldn't get much higher (if at all) even with higher multi.
 
with GTLVREF tuning, you could try it as low as 1.15-1.20V on VTT, that's what I'm running now with -15,-15,-30,-30 and 8x multi.  100% stable under IBT 2.51 and folding on everything.
 
for 8gigs of ram (4 sticks), 1.50-1.55v on spp is understandable.
1.65V on MCP is understandable on MCP for a tri-SLI.
 
the rest (vcore and mem voltage and timings) is a trial and error for specific setup (CPU power demand and memory sticks configuration).
post edited by feniks - 2011/06/20 20:31:16

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