okay. i need some help here. my freinds bosting loads because he has the asus 7850 gpu and i have the gigabyte 560ti and i was wondering what is better. I know that the 7850 is more powerful but i heard the Nvidea can do PhisyX much better than AMD. Please help me someone
The 7850 is faster than the 560Ti, especially if you can get a high overclock on the 7850. At best, the 560Ti might just barely match a stock 7850 on a game that very, very heavily favours Nvidia. For most games, that is not the case, and the 7850 pulls ahead of the 560Ti. Generally speaking, the 7850 is about 7% faster than the 560Ti, though this can vary depending on the which games you are looking at.
GPU accelerated PhysX is an Nvidia exclusive feature, however, very, very few games actually use it. Even in the games that do use it, a list of the games that do use it can be found here. If you have a powerful enough CPU you may still be able to achieve playable framerates with PhysX on without an Nvidia card, apparently the PhysX in Borderlands 2 isn't that demanding.
In any case, I wouldn't upgrade to a 7850 from a 560Ti, it's not a large enough performance boost to justify the expense. Look at a GTX 660Ti or Radeon HD 7950 at minimum if you do want to get a better graphics card. GTX 670 or Radeon HD 7970 would offer an even better performance boost if you can afford one of them.
The 560ti is not all that bad and you can OC. As long as you are happy and getting playable frame rates with your card be happy and game. If you want to out due him I'd sli the 560ti as the prices on them are dropping a good bit. Or sell the 560 ti and get 660.
A lot of it depends on which 560Ti you have. Some of the pre over clocked cards can go toe to toe with even the fastest over clocked 6970.
Best case scenario is that your card is actually faster than the stock 7850 even some of the pre over clocked versions.
As always this will all depend on the game, however once you start factoring in the extra Vram on the 7850 and the fact that even the pre over clocked cards can get some pretty fine over clocks on top of what they already have, then the 7850 is obviously the better card on balance.
That dosent make the 560Ti a bad card, as I said the right ones are plenty good enough to play with a 7850 in a lot of cases.
That said, turn up to a show down with a slower near stock clocked card and you may as well have stayed at home.
The non-reference 560 Ti's can overclock more than just about anything else I have seen in that generation of cards. The Gigabyte 900MHz usually goes toe to toe with the Asus model and it hit the highest OC (1070 Mhz) I have seen in quite some time at 30+% over the card's reference speed So you should be able to get quite a bit more oomph outta that card if ya haven't pushed it yet. Personally, I don't push them more than 1020Mhz-ish
the 560 Ti was nVidia's best selling card last year and with 10.25% market share it outsold (according to Steam server hardware survey) all AMD cards > $200 (7.05%) combined....
NVIDIA GeForce GTX 560 10.25%
NVIDIA GeForce GTX 570 4.37%
ATI Radeon HD 6950 3.83%
NVIDIA GeForce GTX 580 3.76%
ATI Radeon HD 6970 1.85%
NVIDIA GeForce GTX 550 3.02%
ATI Radeon HD 6870 1.37%
In Guru 3D's game test suite, the 900MHz 560 Ti cards from Asus and Gigabyte scored a narrow 372 fps to 360 fps win over the 7850 which I would call a statistical dead heat. Unfortunately, tho we saw the 7970 DCII TOP do 7% better than the reference model, 7850 DCII didn't impress all that much.
But given what you likely paid for your 560 Ti ($210) and what he likely paid for his 7850 ($230 till recently), I'd say you got the better end if the deal on a "cost per frame" basis. I must note however that major brand 7850 prices are still heading south at a surprising rate (Asus model now < $180 after MIR) while the 560 Ti's haven't budged. At this point in time, I consider the 560 Ti / 7850 as the dividing line. At 1920 x 1200, I pretty much use nVidia only above $200; below $200, I mostly use AMD. At the $200 price point, I have a hard time arguing either the 7850 or the 900 Mhz 560 Ti over the other.
Here's how this generation is selling as of last month (in % of DX11 cards hitting steam servers) :
NVIDIA GeForce GTX 670 0.99%
NVIDIA GeForce GTX 680 0.90%
ATI Radeon HD 7850 0.62%
ATI Radeon HD 7970 0.54%
ATI Radeon HD 7770 0.39%
As to your other question, PhysX is an nVidia only feature and AMD can not do it at all. All current nVidia cards handle PhysX. What ya can do is add a separate PhysX card along side an AMD card just as you can have PhysX card take the load off ya nVidia card. A $50 - $80 nVidia card is more than enough for this task. What ya might wanna do is add a 2nd 900MHz gigabyte card as the 560 Ti's scale about 177% in SLI and two of them on a 120Hz monitor playing Batman AC is a real kick.