I've had this machine forever. It started out with a K6/2 350, then a K62+450 @ 550, then a K63+450 @ 550. Maxed ECC RAM. 3 levels of cache with the latest processor (1 MB on mobo!) Last spring I got around to putting XP on it. Was disappointed with the AT/33 disc i/f when everything else was so nice. I purchased a Syba ULTRA ATA/133 raid based on the Silicon Image SIL680 Ultra ATA/133 IDE controller chipset. It supports both RAID and JBOD. Installed the card, loaded the bios, set MOBO to boot from SCSI, configured the card when it found the HDD, and bazoom! Really nice with my DiamondMax 5T040H4 ata 100 drive. It worked great for months. Then it started booting slowly. Then it started general misbehaving with an occasional crash. I figured the HDD was corrupt. Loaded SpinRite and it wouldn't even run consistently. Put a new P/S in, no different. BIOS finds the card. Card finds disc. Won't boot. Removed all the unnescessary boards including Syba RAID and put the HDD on the MOBO primary AT socket. Runs like a charm. Put the Syba board back in, Syba board not recognized, system won't boot from MOBO primary. Shazzam! It's the Syba card, right! I bought another low cost RAID card based on a VIA chipset. _EXACT_ same problems. I tried swapping PCI slots, about everything I can think of. I even went with really conservative system board timings, tried resetting the BIOS. I know it wasn't tweaked before failing because it is password protected. I'm distressed! Given the fact that now the system occasionaly hangs before the BIOS clears, I'm wondering if this MOBO has just basically gone south. Buy another on EBAY? Reseat all my board jumpers? What? What the what? What do 'yall say? tanks. pc