I installed the 9.3 drivers for my radeon 4890, but it still outputs 31k. It doesn't sync with my arcade monitor and is still outputting 31k to my test lcd monitor.
It has 3 ports: 2x dvi, and one svideo. I am using the dvi port that is closest to the motherboard with a dvi-vga adapter. The other dvi doesn't appear to put out anything - plugging it to my LCD does not give a "out of sync" message, nor does it display anything on the arcade monitor when I hook it up.
I installed by removing all previous drivers with ati removal utility, and used the xp 64 drivers.
I've done this on two other systems, with no problems. I don't understand why it isn't working.
Driver reads HD radeon 4890. using arcade OSD, i don't see any 640x480x60i in my list of resolutions.