Msi gtx 670 that I bought about 12 months ago.
Originally Got the GTX 770 but had to return it as my old asus M3NHT deluxe mempipe mobo refused to post with it, And I thought the card was faulty until the guy tested it in store and it worked fine.
After returning the 770 for the 670 I discovered that that too would make my mobo freeze at the splash screen. But discovered that it would post ONLY in the middle PCIE slot. I presume the 770 would have too.
Its a 3 way SLI board, All x16 slots. My brother has a EVGA gtx 670 based on the 680 chipset which works fine in any slot, A gtx 460 works fine, An old gtx 275 also works without problems in any slot.
10 points if anyone can enlighten me as to why this is.
Things I have read: Its an nvidia chipset.. Aka legacy.
An issue with UEFI bios maybe?