1GB vs 512MB

I would say 1G at that res,

Hi, thanks for your reply.

The XFX 1GB one is £22 or 22.4% more expensive than the Asus 512MB one, ie. £120 vs £98.

Do you think that the 1GB one would provide more than 22% more performance at this res with for example Crysis Warhead, than the 512MB one? Also I'm running a PCIe v.1 motherboard here so that might be a bottleneck (or is it?).

cheers

OK, I'll try to keep it short but it's a mess, what are your system spec's, what games do you play, what games do you want to play, and you play at 1900x1200, BIG demand on the card, if you got a Pentium"D", some games will be held back by the CPU rather than the GPU, if you had a C2D, then the card would be the big factor,( the memory would really be helpful), if you aren't running all the eye candy at 4AA and V-Sync on, then the 512 might be OK, but is there a 25% difference in performance, I don't think so, but there are a lot of variables that can change the game

OK yeah I should have given this info but here it is:
CPU: AMD Phenom II X4 940, stock clocks (3.0GHz) but might change when I get a new cooler next month
RAM: 4GB DDR2
PSU: 450W Corsair VX series but supposedly can go way above that
Mobo: nForce 520LE; PCIe. x16 v.1

The only game I play that doesn't run very well on max settings is Crysis (and warhead of course), oh yeah and GTA IV but that's not a priority (well not the reason I'm thinking of getting a new GPU anyway).

I never use AA on crysis, and don't need Vsync either. I would like to have texture settings at high or very high, and shaders at high or very high aswell.

cheers

cool, good fraggin

cool, you got enough CPU to keep up with the games alright, personally, the 1G card, you run alot of res, big CPU, seems like a moot point

OK thanks, I'll save for the 1G card then.

1GB is basically recommended for 1920 x 1080 and above since more textures are used. I haven't seen a comparision between a 512MB and 1GB version of the same video card @ 1920 x 1080 / 1920 x 1200 recently, but I think the performance is around 2% - 5% on average.

Performance varies from game to game, I think (I could be wrong) Quake IV got around a 20% boost. Some games take a hit in performance, but not beyond -2% from what I remember.

Hmm, I would have thought then that Crysis would have a large benefit from lots of VRAM as it loads a tonne of textures.