http://www.hwcompare.com/1361/geforce-8800-gtx-vs-radeon-hd-5750-1gb/
first thing to pop up, when you google 8800gtx vs 5750.
It looks like the 5750 is around 11-47% faster, depending on the game.
And in fallout3, the 8800GTX ran into a memory limit situation, and there was a 124% differnce. But if we look past that 1 situation, looks like its around 11-47% slower than the 5750.
Not sure how creditable the source is though.
5750 performance level or so, isnt bad. If you stick to around 1680x1050 ish resolutions and not go overboard with AA, you should still have enjoyable gameing experiances even with the newest games.
- Power use, the 5750 uses like half the power draw the 8800GTX does.
Although the MSRP for the GeForce 8800 GTX is $599, this MSI card is currently retailing for around $650, though we are confident this price will fall eventually.
- techspot 2006.
So at launch the 8800GTX was supposed to cost 599$ = 600$, but MSI's ended up at 650$ probably due to price gaugeing at shops.
Today you can buy a brand new 6750 for like 80$ on newegg.
So the value of the 8800GTX would have to be somewhat lower than that.