The other day I received a 2MB ATI Graphics Ultra Pro video card from a seller on ebay (one of the best 2MB EISA video cards that works with OS/2). My current system is a 486DX50 with a 1MB S3 based EISA video card. When I removed the S3 card and Installed the ATI one the machine would not boot, just beeped. I checked the jumper settings on the ATI to make sure it was VGA enabled and then tried setting the address for the card and still nothing. I put the old S3 in and all was fine. Now my problem is I get a EISA Inoperable message even with the s3 video card, the EISA configuration software I have finds the cards installed but gets a write error when trying to write the configuration to the battery backed chip (Dallas DS1225Y-200). So basically I can only boot to floppy (I have an ISA I/O card with floppy connected), while my 9GB HD connected to the EISA Adaptec card does not show up. Has my Dallas chips battery finally died on me (I had to replace the other Dallas RTC chip when I purchased the board last year, it still keeps time fine)? Did my installing of the ATI damage the Dallas chip by chance? Did I get a defective video card? I need to figure out what's up before I buy another EISA backup chip $15 and wreck it, and decide what to do about the ATI from ebay. Any ideas?