Somebody recommended it would be more beneficial to my rig during upgrade to sell my current HIS 6950 2gb and purchase a single GTX 670, which not counting time and effort for sales saves me roughly 100-150$ against purchasing another 6950 to go for some crossfire action, any recommendations? If the benefits of crossfire are strong enough Im happy to fork out the extra cash, performance is my goal but the budget for the GPU lies at 300-400$ max. Any replies appreciated, thank you!
I would sell the 6950 and get a EVGA GTX 670 FTW. It's only $400 after $10 rebate on Newegg and it beats a reference GTX 680 out the box. You would still have the extra slot for a future GTX 670 and it would ROFL PWN the 6950 CF. Also, you would have the benefit of using less power for now vs a CF 6950 set up. Plus it looks really nice too.
Here is a pic of it in my rig, I also have a GTX 560 Ti for PhysX and I will purchase another GTX 670 FTW soon to SLI.
If you are in the US, from taking a quick glance on Craigslist, I see them selling for around $160 to $190 for the 6950. I think $180 should be fair, you could try $200 and work your way down from there. The 5750, I see them going for about $110.
the 6990 in this review would be similar to xfire 6950's. and I think 2 cards was faster than the single dual card. something to do with the extra heat the single card generated so they under clocked it.