I'm glad I'm not the only one having this problem...this is driving me nuts!  I have two Epox 8kt3's and I'm having major problems with my IDE devices.  I have the non-raid one...I have a Seagate 20GB ATA 66 drive as master on IDE1 and a IBM 45GB ATA 100 as the slave on IDE1...I then have a Toshiba 16x DVD-ROM as the master on IDE2, and a Plextor 32/10/12 as the slave.  When I copy files to my D drive my computer either locks up, or gives me a failed to write to drive D message.  Whenever I install a CD-ROM on my system using my Toshiba it always locks up...never in the same spot...it sometimes locks up when installing with the Plextor.  I thought at first I might have a bad cable, so I changed them all out with brand new cables.  That's didn't work...so I popped in the other EPox 8kt3 I have which was still unopened...same problem...I even put a 12x Toshiba in there...same problem...I then put a brand new IBM 45GB drive in there...same problem.  All these drives worked and still work great when there in my Abit SE6 P3 700 system.  I tried two brand new T-bird's in the system...a 1.2GHz and a 900MHz...I also tried didn't DIMM's..corsair and Micron PC133.  I also tried taking off the heatsink of the mobo chipset and I put some artic silver thermal compund on it...I've tried all kind's of different bios settings...I've tried all 3 bios updates, and the 3 newest VIA 4-1 drivers.  This situation just sucks!  I also have a Abit KT7a-Raid on the way...I guess if I use that motherboard, and put my two IBM 45GB drives on the raid, and then put each DVD/CD-RW as masters on IDE1 and the other on IDE2, that may solve my crashing problems.  I sure hope someone fixes this problem soon...I was hoping this was just a problem with Epox boards, but it looks like it's effecting a lot of different KT133a boards.