NV and AMD GPUs will use VRAM differently but if a game needs more than 1GB of VRAM, there is NOTHING in the world NV can do to stop a 1GB card from tanking in those games. SKYRIM, Max Payne 3 are recent examples where 1GB of VRAM is not enough. Games such as Shogun 2 on Ultra at 1080P will use up more than 1.5GB of VRAM and tank completely on something like a GTX570 1.28GB, which is why AnandTech's tests still don't use Ultra at 1080P for Shogun 2.
Don't mix and match HD6950 2GB vs. GTX560Ti 1GB threads with this one. You aren't even comparing apples and oranges here.
Maybe we should have a survey here who would take a GTX560Ti 1GB over an HD6950 2GB? I would bet you most people here wouldn't even touch a $180 1GB GTX560Ti with a 30-foot pole. You say I have no idea about 1GB VRAM bottleneck, and yet you dismissed this in another thread as irrelevant:
1GB of VRAM is becoming a serious bottleneck in some games. You can dismiss it all you want but there is no way the GPU in the GTX570 is 40-100% faster than GTX560Ti.
The poor performance in Dirt Showdown and Sniper Elite V2 has little to do with VRAM problem for the 680 aside from 3 monitors where ideally you'd want at least 3GB. Somehow though out of all the things in my post you picked up 3GB VRAM and missed everything else?
I honestly can't recall GTX580 beating HD7970 in SKYRIM with AA on, and with latest drivers
it's not even close, especially at 2560x1600. Since we are discussing how cards stack up today, that's pretty relevant.
It's not my fault AMD's driver team has fixed most of their driver problems with Dirt 3, SKYRIM, Battlefield 3 with Cats 12.7Beta. I recommended GTX670/680 cards for about 3 months actually. Now, with prices drops on the 7950/7970 and Cats 12.7B, the tides have turned imo.
NV's driver relationships may be good but while AMD has made up the huge deficit in BF3, SKYRIM, Batman AC and Dirt 3, NV has done almost nothing to cut the lead AMD has in these titles:
- Anno 2070, Serious Sam 3, Bullet Storm, Metro 2033, Alan Wake, Crysis 1/Warhead, Dirt Showdown, Sniper Elite V2, etc. This is why the number of games in which GTX680 is faster is getting smaller and smaller.
Of course you can get a
factory preoverclocked GTX680 it does well against the 1050mhz HD7970. But those early HD7970 vs. GTX680 reviews in March are pretty much irrelevant at this point. All the latest review from Xbitlabs, TechPowerup, TechReport, TechSpot, BitTech, KitGuru, Tom's Hardware, AnandTech have declared HD7970 GE the fastest GPU now.
Launch time:
GTX680 $500 > $550 HD7970 925mhz
Today:
Sapphire Vapor-X $450 > GTX680 $500
And NV charges
$580 for reference GTX680 4GB. I think GTX660Ti is a good time for NV to drop prices $30-50.