I have a soltek sl54-u1 running an amd k63+450 as we speak. It is my workbench computer ( I have 3 pc's a p3 750@825, an Athalon 850 and it)
It would not be fair to say it is the best due to my limited experiences with the k63+ it runs very very well on that board. The board has along with the standard 66.6,75,83.3,95,and 100 mhz bus settings, settings for 112,124 and 133 as well. My current settings are:
2.1volts
112 FSB
4.5 multiplier
-----------------------
504 mhz
I can and have succesfully run this chip at 100 X 5.5 for 550 but I test higher all around running at 504 with 112 FSB.
I get a cpumark99 score of 56.2 which is dam good for any socket 7 cpu and plain spanks most celerons as well. If you are curious as to a full set of winbench test drop me an email and I will send them to you. A couple of things I must add about this cpu however for there are alot of myths circulating around about it right now. First, just because your mobo runs the k6-2 or k6-3 does not mean that it will boot with this cpu I have had several boards that would not. You need to make sure you mobo manufactorer has a bios thats supports it. Second, it does not contain the athlon fpu unit as some people say but the fpu of the k6-2,3. This is a real bummer. Still dollar for dollar if you already have a mobo that will run it it is well worth the money, you can pick them up right now for 64 bucks.