I have been fine....
here's what I did
Updated BIOS to ASUS card one
Voltage is at 1212
I am now running a Acoustic Research AR-489 Pro II Series DVI Repeater
Awesome to hear that -- fedex just delivered two AR-489's i ordered a few days ago.
Unfortunately I spoke too soon and last night I had blinking like crazy. But since this morning, no blinking at all. I didnt turn the computer off or reboot or anything -- the computer was on all night (but the power setts do turn the monitors off after 30 minutes of inactivity). I am on Windows 7 64bit, by the way.
The little manual the AR-489's came with states that the dvi display cable should be 85% shorter than the source cable. What is your cabling like with the AR-489?
I am running XFX 5750's, but I havent seen any bios update for them. Do you think the BIOS you used would work on them? I also asked Dave Baumann to post a 5750 BIOS and am awaiting his reply.
Although its been several hours without a flicker i suspect it will come back. Right now everything is perfect and my monitors are arranged just like I want, so I am going to wait until it starts happening again to hook up the AR-489's. If i unplug just one monitor, all of the eyefinity groups break, and my whole arrangement of various portrait orientations and relative positions gets reset.
I have a pretty intense setup (12 monitors total -- two portrait eyefinity'ed groups of two, one landscape eyefinity'ed group of two, and then 6 independant portrait) and it takes foreeeever to configure everything so that it is just right. Windows 7 never remembers which monitor is which after reboots -- they get completely renumbered each time.