This demo include a nobrainer benchmark mode, shall work on most ati and probably nvidia's as well.
Download the demo here
After installation, go to the directory and run benchmark.bat to start benchmark. At the end press printscreen or F12 to capture result.
Be honest, don't modify system.cfg. You are free to tweak other stuff though.
Here's my result with everything at default:
a64 3200+ 1MB@260x10 2.5-3-3-10
x800xt-pe 639/606
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