the big thing guys is that 16X / 8X doesn't show any performance hit compared to 16X / 16X. in my EVGA X58 SLI review, it was the first thing i was interested in and spent a lot more time than just the results i posted on it. to this day, i can not find any repeatable or remotely significant difference with a pair of GTX 280s. i just spent last night benching the CPU under LN2 again and with the cards clocked at 756/1512/1296 and the i7 965 at 5800MHz...there wasn't a lick of difference between the cards in 16X slots versus 16X/8X in 3DMark 06. some other configuration, possibly 3-way SLI, may show gains to the larger width PCI-E lanes but so far i can't find a thing with a couple cards...but i'll keep testing
good to see some more testing on this subject though
