My first post so I hope everyone cuts me some slack... I read the overcloking prerequisites and I know the answers to the five basic overclocking questions... so I presume I qualify. Anyway here goes... I have an ASUS A7N266E MOBO currently running an Athlon XP 2100+ and it does OK. I happen to come in possession of an Athlon XP-M 266 2400+, a low power (35W 1.35V) version that I was going to use in a laptop ugrade project. (Actually worked quite well but that's another story...) Decided to sell the laptop and buy a new one instead so I figured I'd stick the XP-M in in my desktop. Not too familiar with the XP-M other than it's supposed to be a good overclocker and operates well at low voltages. Well I swapped out my 2100+ for the XP-M 2400+. Set the bus speed in BIOS to the required 133/33 setting and the multiplier to the lowest setting of 6.5X and started benchmarking with SiSoft Sandra 2005 using the combined system benchmark. All goes well while upping the multiplier and once i reached a multiplier of about 9.5X it pretty well matched the 2100+ in performance, except for the file system benchmark. It was abysmal, like 20% of what I was getting with the 2100+. Kept upping the multiplier to 11X... all the performance benchmarks continue to climb with the exception of the file system benchmark. It's benching at 3192... down from 49576 with the 2100+. So why the big drop off in file system benchmarking? I guess I don't know exactly what is being affected (besides the hard drives obviously....) Is there any way to remedy this or is the XP-M just not happy with this motherboard? I'm running a CPU core voltage of 1.7 volts by the way, which is my lowest available setting.