Presumed reqirements Of GTAIV PC

http://www.gtaforums.com/index.php?showtopic=366129

Take these with a grain of salt.

Typically Rockstar  well give a lower expectation of system requirements than what the kids normally  cook up.

Minimum System Requirements for Mass Effect on the PC Operating System: Windows XP or Vista Processor: 2.4+GHZ Intel or 2.0+GHZ AMD Memory: 1 Gigabyte Ram (XP) 2 Gigabyte Ram (Vista) Video Card: NVIDIA GeForce 6 series(6800GT or better) ATI 1300XT or better (X1550, X1600 Pro and HD2400 are below minimum system requirements) Hard Drive Space: 12 Gigabytes Sound Card: DirectX 9.0c compatible sound card and drivers ———- Recommended System Requirements for Mass Effect on the PC Operating System: Windows XP or Vista Processor: 2.6+GHZ Intel or 2.4+GHZ AMD Memory: 2 Gigabyte Ram Video Card: NVIDIA GeForce 7900 GTX or higher. ATI X1800 XL series or higher Hard Drive Space: 12 Gigabytes Sound Card: DirectX 9.0c compatible sound card and drivers – 5.1 sound card recommended

If you scroll down lower you will see that someone has already cooked it up on an official gaming site. They are usually wrong also.

1.6 cpu (single core) 3 year old vid card (vga) , 512 ram (ddr)  dx9c  probably the min requirements

optimal is probably closer to

2g dual core, 1.5 year old vid card . 1.5 g ram ddr2 dx10.

And of course the game never really plays smooth until two years of vid card evolution passes by.

I am sure o/s does not matter.. as long as dx10 makes it’s way to xp sp3.