I Have a AMD K6/2-400 with a TNT-2 & 128Meg RAM. I get 25-40 FPS depending on scene. Movies are around 25 FPS to give you an idea. More FPS isn't allways better!
The difference between K6 and K7 (Athlon) are HUGE, they are totally different design, a completetly diffent class of processor.
The difference Between K6-2 and a K6-3 is the K6-3 has a very good Cache design (important for graphics) It is on par with Pentium IIIs of eqaul clock speed. The K6-2 has a fairly bad cache design and a not so good floating point unit. Which makes them slightly inferior to a celeron of similar clock speeds. They are now doing 550 K6-2 and they have dropped the K6-3, so maybe K6-2 have been improved.
If you have the money dont get a K6 they're ok, but not speed deamons.
As for intel vs Athlon, there aint much real difference. The Athlon can run the FSB at 200 Mhz (twice that of an intel) but good luck finding RAM that runs at that speed.
I think the Athlon is a superior chip with a better FPU and Cache - especially when you consider its alot cheaper for the same bang.
If i was you id get a slightly slower chip and spend the rest of the money on a good video card (spelt 'G-Force Pro') and at least 128 Meg of RAM - 256 if ya wanna play with power

An athlon 700 will outperform and 800 if it has more memory and a good video card. I dont play the clock speed game, its a ploy to get you to spend more. Performance in games (3D) comes from a good FPU, Cache, RAM and an adequate clocked chip.
Have a
good think about it. Purchase more RAM and the Best video card over clock speed - you wont regret it.
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