My friend is going to buy my gtx 465 for 100 bucks and i got about 170 bucks extra lying around, it seems to me the best bang for the buck is buying 2 6850's in xfire mode (also my MB supports xfire) but i was just wondering if you think my PSU would support it. The 6850's only take one 6 pin each so that is covered at least, and from the random benchmarks ive seen they only consume around 230 watts at load, so in theory it should work ya?
For a system using two Radeon HD 6850 graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 600 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 35 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.
Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.
The Antec High Current Gamer 520W (HCG-520), with its +12 Volt continuous current rating of 40 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is sufficient to power your system configuration with two Radeon HD 6850 in 2-way CrossFireX mode.
Thanks! I think i am gonna do it. And to the guy telling me not to do xfire, i have a budget of around 270 bucks and i think two 6850's will blow the heels off of any single card in that price range. Feel free to correct me as i am not an expert, but in my bit of research i did it seemed 2 6850's would sufficiently stomp a 448 core 560ti (about same price as 2 6850's).