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 VistaProcessor:
2.4+GHZ Intel or 2.0+GHZ AMDMemory:
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 GigabytesSound Card:
DirectX 9.0c compatible sound card and drivers
———-Recommended System Requirements for Mass Effect on the PC
Operating System:
Windows XP or VistaProcessor:
2.6+GHZ Intel or 2.4+GHZ AMDMemory:
2 Gigabyte RamVideo Card:
NVIDIA GeForce 7900 GTX or higher.
ATI X1800 XL series or higherHard Drive Space:
12 GigabytesSound 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.