Well, actually, I was questioning the speed. For example I have 4 GB of DDR2, PC5400 (667 MHz). What tells you the speed of it is the "PCxx00" numbers; PC6400 runs at 800 MHz, and so on.Understand that even though Hellgate might be working, it's hard to compare one game to another simply because it depends on a number of different variables in how the game's engine manages system resources. Hellgate might work, but The Witcher could very well cause you problems.All I can really think to tell you is give it a shot. If the performance is rough, you may have to do some hardware upgrading; this, of course, is totally your call to make, but like Slicer77 said, your machine should be able to handle it on minimum settings.EDIT: Just make sure you have the latest patch installed for The Witcher as well. You'll save yourself some headaches... EDIT AGAIN: Oh, and the Vista hotfix that adresses memory management issues in Vista. You can find all of this at the "Registration & Patch" page from the main page.