Radeon 5870 or a new Geforce 580

Perhaps Radarman or someone else with intelligence can offer an opinion (abundance of dumb asses out there - ill advised) can answer this but I am wanting to buy a new GPU for FSX. I have been watching the prices of the Radeon 5870 and they are falling, having said that, the new GeForce 580 cards are just a C-hair more expensive. I know that FSX is CPU dependant, however, what GPU would you recommend. I am running an 8800 GTX and want a little more FPS improvement before tearing down my whole system. Unless I am wrong, some of the older cards work better with FSX because it doesn't support the new tech like Direct X 11, etc.

I would recommend the GTX 580 series in my opinion, but what I personally would do is buy a GTX 460/480 series or equivalent, which can be picked up for $220-250CAD which isnt too shabby, then get a top of the line processor, like the i7 980 and overclock to 4GHz and something like 8GB RAM. That would give you a SWEET system, but if you can afford it go the full mile and get the GTX 580 in my opinion

Perfect - thanks. Everybody keeps posting their positive results with respect to the i7 980. I'll probably swap the CPU out next.

No problem, sounds like your going to have a killer system.