I built a mid-entry system back in Feb. and at the time I decided to intall Vista 32-Bit Premium. However, i'm sorta kicking myself for doing that because I put in 4GB's of PC2-6400. Now, of course, I do realize that the 32-bit version of Vista wont use my full 4GB (it recognizes 3.18GB which I'm guessing its actually using, right?), but the Windows Experience Index is only giving me a score of 4.8 for my RAM. Any idea why? I thought it would have been for sure 5.9 since I'm maxing out the top amount. Also, I'm not doing any gaming right now cause I'm using the on-board GeForce 7150 until I upgrade to a new video card (which is gonna be soon). Also, the RAM is single channel. So, why do you guys think my RAM score is that low? and is this gonna have any significant effect on gaming? and since I'm having this RAM issue, would it be a good idea to get a video card with 1GB of RAM instead of 512MB? Would it be worth it to upgrade to the 64-bit version? Finally, I'm running the Intel Q6600 processor, is that a 64-bit cpu, and is it compatible with the 64-bit version of Vista? Thanks