Should i use 4 or 5 gigs of ram?

If you have it, it wouldn't hurt. But the performance wouldn't be dramatic.

What you should think of doing is just spending $40 and getting another 8gb (two sticks at 4gb) or 4gb (2 sticks at 2gb). Then there will be a difference.

Being that you are giving system scores, I assume you care about performance.

Your bottleneck is i am sure the Hard drives.

If you install something called a Solid State Drive, you will run at 550mb/s, whereas a standard HDD runs at 40mb/s. All load times will be near instant, and the drives start at $135 for trusty one.

Also, please don't buy store built, especially walmart. Email me. I will walk you through component purchases, and even the build. Build your own. looking at that comp, it could be built for around $400 with high-end hardware. If it was more than that, contact me next time or return this one now and I'll help ya out =P

I doubt very much that your are even getting close to using the 4GB, I don't see a need to compromise the systems efficiency for the sake of having an extra Gig of RAM that won't be used.

Considering the fact you won't use over 4GB even if you torture the computer I would leave the 4GB so it runs at dual channel

6. 3x2 gb.