I ran Aquamark 3 benchmark and while I don't get hung up on such things, a score of 20,000 really showed up some graphics weaknesses.
Out of curiosity I ran the benchmark on my old 1.6GHz P4, 1 Gig of slow SDRAM and a GeForce4 Ti 4200 (which I think is probably worse than your card) but I hit 85% of your benchmark number - with the test slowing to <6fps at the end. Something seems a bit wrong.
For comedy value i'm running it on an almost-brand-new Dell 2400 (yeah, I know ... but it was under £100 brand new, incl. VAT and delivery from the outlet store and came with speakers and a Logitech wireless keyboard worth nearly that on their own). It's got a Celeron 2600, half a gig of PC2700 and "Intel Extreme integrated graphics"

and is managing a comical 1.2 frames per second on the "large scale vegetation rendering" benchmark, and hasn't even got to the hard bit yet! I'll let you know the final score... if it ever finishes!
At the risk of going a bit off-topic, it shows how bl**dy awful Dells can be. This machine is only two months old and retails at over £600, but can't play any modern 3D games. Worse than that, it has a bastardized motherboard that means you can't even add a proper graphics card to replace the junk it shipped with. If I didn't know better and got this for myself as a general-purpose computer, i'd be deeply fscked off with it!
As it is, I needed a fileserver and for the price I paid you can't go wrong
edit: a massive 3.3fps average for a score of 3277, go baby! It ended up as more like seconds-per-frame at the end