The fastest videocard for FSX will probably be the AMD Radeon 7970, released in early January.
4.31 billion transistors and 264 GB/s of memory bandwidth.
http://tpucdn.com/reviews/AMD/HD_7970/images/perfrel_2560.gif(5970, 6990 and GTX 590 have two graphics chips in them, which FSX doesn't use)
Is it good value for money? Not really. However, if you already have a top end processor (i7-3930K or i7-3960X) then this will be the card to pair it with.
Quote:and so more money should be invested in the fastest CPU you can afford rather than the video card ie you get better results from a faster CPU - is that correct?
It's all about balance. In FSX the balance is shifted towards to CPU side of things compared to games, but that
doesn't mean the graphics card is unimportant either. And generally computer programs will only perform as well as the slowest part: there's no point having a $1000 i7-3960X using integrated graphics and there's no point having a $550 AMD Radeon 7970 paired up with a 5 year old Pentium 4. On the other hand, an i7-3960X and Radeon 7970 would be extremely impressive.
Also often very high end hardware is poor value for money compared to mid-end stuff. So spending all your money on one part while neglecting others can be a horrendous waste of money - both because you're upsetting a balance and because the really expensive part may not be much better. So it's not entirely correct. You should spend your money on the fastest CPU + mobo + ram + videocard combination you can get, because they're all important.
I rarely use FSX and my system isn't very balanced for FSX. A Q6600 @ 3.4ghz is way too slow to unleash a GTX 570 in FSX. Why did I get a GTX 570 then? Cause I got a free upgrade from a lower end card that turned out to be defective and in most computer are very graphics intensive compared to FSX. As a general rule of thumb, in my opinion, pair high end graphics cards with high end processors for best results. And mid end processors with mid end graphics cards.
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