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#11
I did as you said, and I dunno, I may be reading the info incorrectly, but with my game running (Along with all my other normal programs), it seems as if the system is using up a little more than 3/4's of the total ram. Now keep in mind, even with all my programs and the game running at one time, it was running smooooooooth as butter with all the graphics at max settings. I'm posting up a screen shot of Resource Manager both with the game running, and without the game running. Tell me what y'all think.
The snips of your resource monitor show over 3GB RAM in use while the game is running and a bit less than 1.5GB when it's not. The thing about Windows 7 is it's much better at utilizing available RAM compared to previous operating systems. RAM is always faster than a pagefile/virtual memory running on a mechanical hard drive so if RAM is available, 7 will use it. If you upgrade to 8GB, it wouldn't surprise me if RAM usage remained pretty much the same.
For me, the biggest advantage to upgrading now is the low prices on RAM and making sure your computer can handle more memory intensive games that are sure to come out in the not too distant future.
As Lee says, if you want to plan for the future, an upgrade may be OK. But for the time being you are fine. 8GB would provide more RAM for caching, but that is not such a big deal.
Considering that the RAM upgrade would cost you around $50 and an SSD is $100, I would rather go for the SSD. That would give you a lot more overall benefits.