This afternoon, Smile and I have been working on a new version which makes the CPU run at 100% on all cores (on 4 threads, around 60% if you have 8 threads) and we think we may have fixed the issues with AMD chips.
Here are some benchmarks I ran on my old Q8300. I've added a "Restart Benchmark" button which will clear all the scores and restart the benchmark if you wish, and I've added warning dialogues about the crashing as well as a dialogue/message box which shows up once the bench has completed. SmileMan has been working on another set of new instructions and sorting out the issues with AMD CPUs.
As the Q8300 is an old chip (and I'm using Vista on a dying 5400 RPM HDD), you should be able to expect your scores to be much LOWER/better than what I achieved.
Temps wise, you need to be careful about running this benchmark now if you have an overclocked CPU but with stock or poor cooling. I was getting around 70C with the stock cooler on my Q8300 at full load. The benchmark runs for around 3-5 minutes now on slower CPUs (around 1-2 on faster ones) so make sure your chip can withstand fairly high temps for short periods of time before running the new bench. I would not recommend running this benchmark if you have an unstable or untested overclock.
The new version will be available to download and run shortly. I see SmileMan has already cleared all of the scores.
I'll let you know how my 2500K does too.