Semprons have usually no issue reaching 200 MHz FSB if your Motherboard and Memory Modules supports it (And seems that they can). Keep always an eye open in your Processor temperatures and overall system stability if you want to overclock. It is quite hard to fry a Processor because overclocking, there will be always stability issues much before your Processor starts to be permanently damaged that can tell you that your computer isn't happy. If your Processor temperatures are lower that 55C° after overclocking and your system runs properly, you should not worry about doing so.
Well I just set the jumper for 200Mhz FSB, CPU runs as smooth as ever BUT!! I havent closed the case yet or let it run for a longtime I dont know if that matters.. ??? also its showing in windows now as Amd athlon 2.00GHZ processor...
in the bios the on die temp it about 56 degree celcius but in windows i have a hardware monitor program that read it as a constant 39 degree's.. well I think that program is wrong.. not sure.. who know.. seems to reading my cpu fan RPM accurately though.
If you computer is able to run during two or three hours a heavy game (Doom 3 for example) and doesn't have issues that you didn't before, then it should be stable. If you close the case, you can wait for a little higher temperatures (Depending if you have Coolers in the Case or not it can be a little higher or considerabily higher because the poor airflow inside the closed case). Don't care about what Windows reports, that is because your Processor doesn't match the specifications of an existing Processor that your BIOS recognizes so it gives wrong information (Altough the Frecuency is well, the name of the Processor is not).