Hello! I've Asus A7V266-E mobo, recently updated bios to latest version which support up to 2600+ V1011. I was using an AMD 1800 xp until today, replaced it with a 2500 Barton. However, the clock speed can't be set higher than 1,48ghz in the bios! Why? I'm going to re-read my mobo manual in the meantime.
Yeah, kinda sucks, but Asus has nothing whatsoever to do with it. It's VIA and the KT266 chipset. MSI, Gigabyte, Abit...all the manufacturers used KT266 chipsets. VIA followed the KT266 with the KT333 and the KT400, each of which had faster FSB.
Your chip is about 6 months too new for your board. Try and find a board with a KT333, KT400, or--better yet--an nForce 2 chipset if you want to run at 1.8 GHz. All of these are obsolete, but you can still find them retail for a song. The nForce 2 is an especially nice chipset...look for an Asus A7N8X board.
Yeah, some manufacturers have adjustable FSB settings in the BIOS. I doubt you'd get too far by OC'ing your FSB since your AGP & PCI busses would be dragged along for the ride. Assuming your board could take it and has an AGP/PCI lock, with fast RAM you could get things running at 1.8...in theory lol.
I agree...Epox made some of the best OC'ing boards around for the KT266A.