Hello. I have just recently brought and AMD athlon barton core 2600+ processor with a FSB of 333mhz with a albatron kx600 pro mother board. I have one stick of pc2100 266mhz ddr ram at 256mb. I noticed that when browsing around the bios and downloading a cpu information program called Belarc that the FSB of my athlon xp2600+ was listed at 166mhz both from belarc and the bios. I went to my bios in the cpu frequency area and I hit enter to see the other option that I could set the fsb of the processor it was only able to reach 200mhz but if I set it at 200mhz the system will not start. The albatron kx600 pro supports FSB speeds up to 400mhz I upgraded the bios to the latest version and still no change. I would like to know if this could cause the processor to be damaged in anyway. I dont think I installed the cpu wrong or I would not be writing this post. I had a celeron 850mhz with a 66/100 FSB and I am noticing little difference in the performance increase there is some performance increase but barely. I would think that the AMD processor had a little more muscle. I am running the latest version of the phoniex bios. Any help will be greatly appreaciated.