I'm building a gaming computer and have chosen all my specs now except for the graphics card. I've narrowed my choices down to either the Sapphire Radeon 7970 Ghz Edition or a GTX 770 EVGA ACX SC. I like the PhysX of the Nvidia card, and the 3GB VRAM on the Radeon card. To me, it appears that next gen games are going to be more optimized towards AMD. EA has announced that Battlefield 4 will be optimized for AMD. How much VRAM do games use now on average? Will that increase to over 2GB within 3 years or so? Is PhysX that noticeable in games? I plan to get Arma 3, which is supposed to use PhysX, that was one reason I considered the 770. I realize they trade blows in most games in terms of performance, but which one will be better in the long run? Thanks in advance.
If you are at 1080p you won't ever need more than 2GB of RAM, atleast not on the cards sold at the moment. They aren't fast enough to run a game at settings high enough to use more than 2GB, so don't worry about it. But if you are going for 1440p, and want to make your setup last 2 years ago, you'll want the 7970.
Basically, flip a coin. The two are really so close it just doesn't matter. The 770 has much better dual GPU support, the 7970 comes with a couple of free games, the 770 is likely to be quieter, the 7970 is likely cheaper. etc.
I do plan on running games at 1080p, I don't plan to ever go over. It's a hard choice, the 7970 has a nice game bundle and the peace of mind of having an extra GB in case somehow they do go over. But then again, the 770 has PhysX. I don't really plan on doing multi-gpu. I think they are almost the same price if not spot-on.
Personally, I'd ignore Physx like it doesn't exist. Its supported in 20 games, woopie. It's really blown out of proportion and everyone seems to be throwing out their AMD cards for it, I've been using an Nvidia setup for the last few months and have played 2 games that supported it. Its not really a deciding factor given all of the other things you have to take into account when buying a card.
But thats just my opinion, someone is bound to dive in here and scream about how super worth amazing the particle effects are...
I just found a chart comparing the two cards, the 770 being 100% performance at 1080p and the 7970 being 96%. For 4% less performance. The 7970 Ghz appears to be the best deal since it has the game bundle. Will PhysX ever not be an Nvidia exclusive?