I've got a 780i sli (not ftw) that's worked great for years. had 2 x 2GB Corsairs in slots 0 and 3. Corsair CMX2X2048-6400C4DHX 800Mhz 4-4-4-12 2.10V v1.1. I bought 2 more identical sticks and it gave error sli memory disabled and wouldn't boot stuck on post. Tried new sticks by themselves and it booted. Tried 4 again, same thing, then read I should boot off 2 and disable sli memory and manually set timings. Now it won't boot at all with even 1 stick in any slot, just detects timing and sits, can't enter BIOS. Reset CMOS no luck. Tried cheaper Patriot ram I know worked before with no luck. Had never overclocked anything, was on optimal. Is the ram bus fried? Have latest BIOS. LED stuck on 6D which mean initializing floppy which I don't have. 1 VGA card only.
Thanks