I would hardly consider your PC "kinda outdated". Let me explain something. There is this common idiotic expectation that more cores and Hz will make your PC a speed machine, same goes for RAM. While these are the two biggest contributers, you must also look at the clock speeds of everything else, including your graphics card, your RAM clock-rate, HDD, etc.
Your old PC is still up to fairly modern standards, your new one isn't surprising you because you could have just updated your processor and you would have been fine. I have yet to even come close to using my whole 4gb's of RAM, and I do a lot of mapping, modelling, and programming on my PC (many times at the same time).
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I'm not sure why people invest in these miltiary-grade machines. While it's nice to future-proof, people get unrealistic expectations, and get upset when their massively overpowered machines don't run any better than their dual / quad cores. I just don't get it. The highest priced Alienware (absolute garbage by the way) runs you at $3500, and has up to 12gb of RAM. Why the hell would you ever need that much?
[/RANT]
I just now realized I've had a typo in my signature for the past 3 years.