That completely depends on the bus speed Shego.
Nonetheless, you should have waited till SP1. It's a guarantee that your computer's hardware doesn't have 100% compatibility with the new OS from Microsoft and may be some time before it will. 4GB with a 32 bit system = good for now
You'd think that a new OS, updated DirectX and all the hoopla coming from Win7 would be better for you or your gaming experience, but you are severely mistakened. It'll be a solid year before it'll work as good as or better than XP. When Nvidia will come out with their drivers to make your card work correctly, it'll be simply functional and won't be the innovation that you'd be hoping for. In fact, most cards that have been released before DirectX 11 and Win 7 will NEVER be as good as they could run in an XP environment as their intent wasn't for that Win7 environment. That and the fact that companies who make hardware will do exactly what they did with Vista... do their work half-assed and with sloppy driver code.
You'll one day get compatibility and run game fine... but don't expect performance. That's all I can say about that.
I'll personally upgrade to Win7, when they got a SP2 out and my PC needs upgrading in 2012. At least then my hardware will be fit to be used for that OS.