Well I've got some cash lying around so I'm thinking of upgrading my system to get win 7 64bit (Home Premium cause I don't need professional crap).
Now most hardware I got in my rig is 64bit friendly but a bit out dated.
Stuff I want to upgrade:
Asus Maximus Formula
Corsair TWIN2X 6400C5DHX DDR2, 4096MB Kit w/two CL5 2GB Dimm's
some crappy ancient Hard drive (sata)
Currently all the stated hardware will work just fine with any 64 bit windows OS.
Really the currently build you have is pretty good. There's not much worth changing. The above poster's motherboard will not support the cpu you currently have. I'd also say the posted harddrive bit dated as well.
I'm not sure you'd see much performance increases in upgrading the current system you have (except maybe ur harddrives which arn't listed) without doing a full overhaul on the system.
What monitor do you have? Maybe it might be worth spending some money on perphials?
There's nothing that 8 GB can do, that 4 GB can't at the moment.
Microsoft says 64 bit requirement is 2 GB for 64 bit.
Unless you want a specialized ultra-high end gaming system (your system is high end enough) or one that you wanna use for a specific purpose, there's no point spending money on hardware, 'coz you've got a pretty good system already.
If you think it's getting slow, then there are ways to quicken things up back to where it was without spending a single penny.
Lemme know if that's what you're looking for.
Btw : You can buy a good looking biga$$ monitor if you don't have one already, and are feeling flush. Give your budget & I'll give you the link accordingly.
You can pretty much run all games on this for the next couple of years.
When looking at hard drives the things to keep in mind are dentisty of the platers and rpms. The fewer the platers and the higher densitiy of each plater will result in faster seek times. RPM of course helps with seek and write times but at the cost of heat and higher chance of mechinical failure.
That's why SSD has become popular as they don't have moving parts which results in very very fast seek and write speeds. I'm guessing that if your system has any bottle neck its probally the hard drive. However this technology is still pretty new, which means it has a high price tag. With the amount of ram you currently have you really shouldn't be going to the hard drive often when gaming. You have enough space to pretty much load the entire game into ram.
I agree with cal that if your experincing "slow downs" most likely you can fix the problems without spending any money. Try updating drivers and cleaning up your hard drive is one example.