RLM, I have changed my mind and returned 4780x2 back to the store. There are two problems for me - first one it is too hot, the design is pretty limited for overclocking such as second GPU is getting 96C even being idle. Some people increase the fan speed, but 60-65% idle is too loud for me, as they recommend.
9800GX2 being watercooled and overclocked, gives almost the same FPS, but it is pretty silent without the stock fan - of course. I will continue to use it for a while, even at 1920x1200.
According to Mr. Natural's (EVGA forum) recommendation I have replaced my expensive Corsair 1800 memory (D9GTR) with inexpensive 2Gbx2 Crucial PC-8500 (1066, D9JNL), at 1.95V it works even better. Mr. Natural had been able to run it at 7-7-7-20-1T@2000Mhz@2.0V ... I haven't try this mode yet, but I know I couldn't boot with Corsair at CLS7@2000MHz no matter which voltage I have used - though I didn't even try more than 2.1V.
I still can't believe that once I have paid $622 for 2x1Gb Crucial DDR3-2000 (D9GTS), which is worse than $400 Corsair 1800C7D and this Corsair kit is worse than $75 Crucial DDR3-1066 (D9JNL) ... either Crucial is mad, DDR3 market or Mr. Natural ... with me as well.
And I am also thinking about trying 790i FTW, Blackops is nice, but Nvidia's stuff is going down in prices so fast ... $250 for FTW is not a bad option to try ... may be they have fixed that instability issue.
No, most probably I will stay with Blackops and wait for x58 Foxconn board.




.. Need to sleep on this
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