As title, picked up a 4870 from an e-tailer.
Received it yesterday, and was really looking forward to a nice performance boost.
To be perfectly honest, I was really disappointed. In fact, so much so that I have returned the card already and am sticking with my trusty GTX.
Before making the decision to return it, I made sure that the old drivers were properly cleaned by running the standard removal, then Driver Sweeper in Safe Mode.
I also tried the Hotfix drivers, which are supposed to be the best available for the 4870 right now, but I just didn't see the gains I expected.
I ran Crysis, COD 4, Stalker and GRID and didn't really see gains that were worth the outlay (would work out around £70 to upgrade when my GTX is sold).
To be perfectly honest though, it's likely my own fault as I like to have vsync enabled, thus limiting the FPS to 60, which is more than enough for any game.
What I didn't really notice before is that almost all of the games I currently play sync perfectly at 60FPS with 4x AA and full AF enabled at my default 1680 x 1050 resolution (except Crysis of course), so the 4870 didn't really have a chance to stretch it's muscles I guess.
I did notice on the Crysis bench that at my default resolution and all settings at high, the 4870 wasn't all that...
GTX scored as follows with no AA.... Min FPS: 20.88, Max FPS: 41.41, Overall Average FPS: 35.315
4870 scored as follows with no AA.... Min FPS: 20.91, Max FPS: 53.25, Overall Average FPS: 44.485
GTX scored as follows with 4x AA.... Min FPS: 17.74, Max FPS: 33.76, Overall Average FPS: 28.29
4870 scored as follows with 4x AA.... Min FPS: 18.22, Max FPS: 40.75, Overall Average FPS: 30.585
Now, 3dMark 06 at 1680 x 1050....
GTX - 12,869, 4870 - 13,760
Now i'm no expert, but those gains are a little disappointing. Look at the minimum FPS on both cards, there is almost no difference at all.
What I also noticed is that the 4870 is shockingly loud on startup, both at the bios screen and once in Windows. Now whilst idle it is no louder than the GTX, and when stressed pretty much the same too. In fact it might even be a little quieter than the GTX, but the pitch is a little more annoying.
So, the card is going back tomorrow. Some of you may think i've gone mad, but this has been my experience, YMMV.
Hope this helps some of you considering changing from a superclocked GTX. IMHO it's not worth it, or at least at 1680 x 1050 it's not.
Received it yesterday, and was really looking forward to a nice performance boost.
To be perfectly honest, I was really disappointed. In fact, so much so that I have returned the card already and am sticking with my trusty GTX.

Before making the decision to return it, I made sure that the old drivers were properly cleaned by running the standard removal, then Driver Sweeper in Safe Mode.
I also tried the Hotfix drivers, which are supposed to be the best available for the 4870 right now, but I just didn't see the gains I expected.
I ran Crysis, COD 4, Stalker and GRID and didn't really see gains that were worth the outlay (would work out around £70 to upgrade when my GTX is sold).
To be perfectly honest though, it's likely my own fault as I like to have vsync enabled, thus limiting the FPS to 60, which is more than enough for any game.
What I didn't really notice before is that almost all of the games I currently play sync perfectly at 60FPS with 4x AA and full AF enabled at my default 1680 x 1050 resolution (except Crysis of course), so the 4870 didn't really have a chance to stretch it's muscles I guess.
I did notice on the Crysis bench that at my default resolution and all settings at high, the 4870 wasn't all that...
GTX scored as follows with no AA.... Min FPS: 20.88, Max FPS: 41.41, Overall Average FPS: 35.315
4870 scored as follows with no AA.... Min FPS: 20.91, Max FPS: 53.25, Overall Average FPS: 44.485
GTX scored as follows with 4x AA.... Min FPS: 17.74, Max FPS: 33.76, Overall Average FPS: 28.29
4870 scored as follows with 4x AA.... Min FPS: 18.22, Max FPS: 40.75, Overall Average FPS: 30.585
Now, 3dMark 06 at 1680 x 1050....
GTX - 12,869, 4870 - 13,760
Now i'm no expert, but those gains are a little disappointing. Look at the minimum FPS on both cards, there is almost no difference at all.

What I also noticed is that the 4870 is shockingly loud on startup, both at the bios screen and once in Windows. Now whilst idle it is no louder than the GTX, and when stressed pretty much the same too. In fact it might even be a little quieter than the GTX, but the pitch is a little more annoying.
So, the card is going back tomorrow. Some of you may think i've gone mad, but this has been my experience, YMMV.
Hope this helps some of you considering changing from a superclocked GTX. IMHO it's not worth it, or at least at 1680 x 1050 it's not.