why is crysis running worse on a 4850 vs a 8800 gts 640?

Hi, I just upgraded from a 8800gts 640mb to a radeon hd 4850 and my FPS in crysis dropped like 5 fps what gives? I'm getting like 17-25fps now on all high,shaders on very high. The anandtech review estimated crysis at my resolution and card to get 37fps.

my current system is

Vista home premium 64bit

q6600 stock

4gb 800mhz ram

radeon hd 4850

Also, when I go to look for newer drivers I can't find any for the 48xx series besides a hotfix..

Possibly remnants of Nvidia drivers, try Driver Cleaner:

http://www.softpedia.com/get/Security/Secure-cleaning/Driver-Cleaner.shtml

Edit: The best solution is to format.

where can I find the newest drivers? When I googled radeon 4850 drivers nothing really came up should I just use the 3870 drivers?

Also, what is the correct way to use driver cleaner?

where can I find the newest drivers? When I googled radeon 4850 drivers nothing really came up should I just use the 3870 drivers?captalchol

I don't think it's a good idea to use drivers that were created for a completely different GPU.

where can I find the newest drivers? When I googled radeon 4850 drivers nothing really came up should I just use the 3870 drivers?

Also, what is the correct way to use driver cleaner?

captalchol

Go here. http://ati.amd.com/support/driver.html And select your driver with options in each window. Everybody with the new 48XX series cards is getting a frame drop in Crysis compared to the GeForce 8, 9, and 200 cards. This is currently the only major game showing this problem. It doesnt seem to be a driver problem as much as the game seems to favor GeForce chips more than the Radeon cards.

[QUOTE="captalchol"]

where can I find the newest drivers? When I googled radeon 4850 drivers nothing really came up should I just use the 3870 drivers?

Also, what is the correct way to use driver cleaner?

kodai

Go here. http://ati.amd.com/support/driver.html And select your driver with options in each window. Everybody with the new 48XX series cards is getting a frame drop in Crysis compared to the GeForce 8, 9, and 200 cards. This is currently the only major game showing this problem. It doesnt seem to be a driver problem as much as the game seems to favor GeForce chips more than the Radeon cards.

dont really care seeing as i dont play crysis much if at all any more i do turn it on occasionally to marvel in its beuty buts thst about it tf2 has me covered for multiple right now so dont really care bout crysis mp altough war head might be a diffrent story.