Why Is System Running so Poorly?

A few months ago I built a system consisting of these parts:

Foxconn A7DA-S 3.0 AM3 790GX mobo
XFX Radeon 4890 1Gb gpu
AMD Phenom II X4 955 3.2Ghz CPU
4Gb DDR3 Kingston RAM
500GB WD Caviar Black HD
NZXT Guardian 921 case

I'm running Windows 7 RC as my OS (will be upgrading to full edition when it comes out).

I've noticed that this computer hasn't been quite living up to my expectations. I mean, don't get me wrong, it runs much smoother than my old computer. But it should blow away a game like WoW and I'm constantly seeing drops in frame rats to mid 30s-40s when I get into even semi-congested areas (e.g. 15v15 BGs, not even the bigger ones).

So I ran both 3DMark06 and 3DMark Vantage and to my suspicion my system isn't really running at what it should be. The numbers:

3DMark 06 Numbers
3DMark Score: 15986 3DMarks
SM 2.0 Score: 6429
SM 3.0 Score: 7446
CPU Score: 4430

3DMark Vantage Numbers
3DMark Score: P10243 3DMarks
CPU Score: 10850
Graphics Score: 10055

Here's a picture of the scores:

As you can see, my system is at the very low end of "comparable" systems. And I have no idea why.

Drivers are up to date (as far as I know). System runs at 40C under full load. I don't have anything running in the background besides my 1 antivirus program.

Any other diagnostics I could run to clue me in to what's going on?

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  1. thats not too bad but bear in mind the top systems are extreme overclocked using liquid nitrogen cooling http://www.ripping.org/benchmarks.php?act=graphicscores&graphic=3DMark06, but check if you have any power saving features enabled and have you got the latests drivers
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