June 10, 200817 yr Not sure if anyone else is having this issue, but I have a 780 sli motherboard with two Nvidia 8800 GTX cards set up in SLI mode. I'm runinng them with a 1000 watt powersupply with an Intel quad 9650 on a Vista 64 system.Now, when I have the cards working in SLI mode, my screen begins blinking when the cards are stressed and then it locks up. I'm running the latest NVIDA drivers, but that hasn't cleared it up. If I only run one card, then everything is fine. Any thoughts as to what might be the problem?Bill
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