Since it's a 32bit OS bring it down to 4GB. The issue of more than 8GB on XP has been discussed so let's get that out of the way.

That said, games do still fresh on even good hardware. This is not a perfect system so while you have new gear, that doesn't mean it won't lock up. Just last week we say a new off the shelf system locking up on Fallout 3 New Vegas. Turns out that is well reported. No fix was issued for that one yet if you try again it works. Very upsetting to folk today.