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really? ive actually played gta4 on my mates pc which has 295gtx and dual core processor at 4.2ghz and wasnt that impressed!
is the game maximised to use dual gpu?
I don't mind saying that my mates PC which is the same as mine (cpu, OC, RAM, resolution etc) is quite a bit faster with an 8800gtx than my 4850. Maybe the extra vram I don't know. My benchmark is 39/40 his is 48/49

Why, it runs at ~30fps at 720p (640p) with low details/draw distance on the consoles so 48fps at 1920*1200 is actually quite good.
It will be as GTA 4 favours Nvidia cards, the 8800 GT wallops the 4870 in it.![]()
GTA4 is a horribly coded game, I get a max of like 31fps with my set up. Yet Crysis runs at 40fps. I think once I get my Phenom II my FPS will increase a fair amount =]
?I have a 295GTX and can play this game at 2560x1600 maxed out settings +16xAF.
You just need to disable the games memory limit, that limits you from turning up the games settings to full when there is not enough VRAM (at the settings above it uses about 1.5GB+).
Then you need to disable the OS from paging to the HDD, so instead it uses system RAM.
When doing this there doesnt really seem to be any performance hit with this game and it's totally playable, but i do have 12GB DDR3 @ 1600mhz.
Paging nearly half of the video data across the PCI-E bus from main RAM entails no visible performance penalty?
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Well either that or the game is still overriding your selections to stop itself falling over. It cannot possibly be transferring that much data from main to video ram without taking a huge performance hit.
You have a 3.11 ghz amd dual core, what did you expect?
Get a proper cpu...
Anyways a GTX 280 should handle it maxed no problems, provided you have a fast Quad core cpu... The game indeed favors nvidia cards over ati cards.
but i'm not sure how well it works for others with slower DDR2 and dual channel RAM... and disabling OS HDD paging was my own idea.
if your going to spend that much on upgrading your PC for just one game... get it on PS3 or xbox 360
You dont need a quad to run this game well. On my i7 GTA4 barely uses more than 17% CPU usage. Thats not even maxing out ONE core, granted the i7 is faster than any AMD CPU but a dual core 3GHz+ is still easily enough.