Just upgraded my trusty old Gainward GTX260GS to a nice shiny XFX 5850 so thought i would share what i have found and stuff 
the upgrade was a breeze and went without issue but have noticed something a little strange with 3dmark vantage, my old score with the nvidia card and processor overclocked to 3.5 had a much higher cpu score like 3x what i've got at the mo, i'm guessing it's the lack of physix that's the problem but that aside i'm very happy with my new card, it's running stock at the mo (725 Core & 4000 Mem) but will get round to overclocking soon, maybe after a cooler change as the one it come with gets a little hot for my liking
anyway as i've said i only got it today so haven't done much so far just 3dmark vantage and fallout 3 (modded) and now i can run it @ 1920x1080 on ultra settings with no slow downs even running 2 GTX260's with overclocked CPU couldn't do that so i'm very happy so far, i'll be updating this thread over the next couple of days with updates if anyone's interested along with overclocks and all that
i'm just installing crysis at the mo as that was a game that as with all but the ultra rich could play on ultra so lets see if 2 or so years after the game come out if it's now playable or not lol
here's a link to the old thread where i upgraded from 2x 8800GT's in sli to 2x GTX260s in sli
i'll update when i've done a little more testing but may take some time due to steam having a big sale last week so got loads of games to test
in the mean time could someone please recommend a cooler and tell me if i can run an nvidia card for physix ( i do have a 8600GTS but have no idea if it will work or how to get 2 different cards to play nice together)
pics & benchmarks coming soon

the upgrade was a breeze and went without issue but have noticed something a little strange with 3dmark vantage, my old score with the nvidia card and processor overclocked to 3.5 had a much higher cpu score like 3x what i've got at the mo, i'm guessing it's the lack of physix that's the problem but that aside i'm very happy with my new card, it's running stock at the mo (725 Core & 4000 Mem) but will get round to overclocking soon, maybe after a cooler change as the one it come with gets a little hot for my liking
anyway as i've said i only got it today so haven't done much so far just 3dmark vantage and fallout 3 (modded) and now i can run it @ 1920x1080 on ultra settings with no slow downs even running 2 GTX260's with overclocked CPU couldn't do that so i'm very happy so far, i'll be updating this thread over the next couple of days with updates if anyone's interested along with overclocks and all that

i'm just installing crysis at the mo as that was a game that as with all but the ultra rich could play on ultra so lets see if 2 or so years after the game come out if it's now playable or not lol
here's a link to the old thread where i upgraded from 2x 8800GT's in sli to 2x GTX260s in sli
i'll update when i've done a little more testing but may take some time due to steam having a big sale last week so got loads of games to test

in the mean time could someone please recommend a cooler and tell me if i can run an nvidia card for physix ( i do have a 8600GTS but have no idea if it will work or how to get 2 different cards to play nice together)
pics & benchmarks coming soon