GPU Passmark Result Lower Than Average

[chivs688]

Ever since I've had my GTX480 (had for the best part of a year) I have always been dubious of whether it was performing to its full potential or not, but have been unsure whether it was me just being paranoid or not.

Just ran a benchmark test in Passmark Performance Test 7.0 and the score I came out with was 3091.6.
The average score for the card shown on the Passmark website is 3525.

So for some reason my card is performing at 500 less points than the average :/

I know some people say not to take these things too literally or seriously etc, but that seems like a bit of a big difference for it to just be nothing, and has me a bit concerned.
All latest drivers.

Any thoughts?

Thanks, Chivs.

 

[chivs688]

I got a score of 1012, which is the lowest GTX480 score there, and one of them has a 1286 :/

 

[chivs688]

My rig consists of:
Intel Core i5-2500K
Asus P8P67 Intel P67 Motherboard
Asus GeForce GTX 480 1536MB GDDR5 PCI-Express Graphics Card
XFX Pro 650W Core Edition Power Supply
OCZ Special OPS 4GB (2x2GB) DDR3 PC3-12800C8 1600MHz Dual Channel Kit
Samsung SpinPoint F3 1TB SATA-II 32MB Cache

Everything is at stock speeds.

Regarding the pci pins, they're just straight from the PSU to the GPU, no adapters, if I'm understanding correctly.