No? 12.1 includes everything 11.12 does, plus 11.11c optimizations which did not make it into 11.12.
Because this is the official driver for December, the 12.1 is a beta and will evolve into January's official driver.
Yeah, but the 5970 he has is a dual GPU card, so it in this case with the 2GB 5870 it would be more like:
1GB + 1 GB + 2GB = 1GB CF
Eyefinity6 editions support 6 monitors on one card.
Are your monitors Display Port? Because each card only ever supports 2 non-DP monitors. So...
Right-click some empty space on your desktop and choose "Screen resolution".
Make sure "Multiple Displays" is set to "Extend these displays"...
You didn't look at the posts though, he's got form.
Seems to know exactly what he's doing.