msi military class 1 motherboard sata 6.0 hdd 640gb DIAMOND 5850PE51G Radeon
OMG! that Radeon again, the nightmare to linux kernel.
I am not in the position to say anything about recent news, but since then I never buy ATI again after my radeon laptop flew out the window because it refused to run on any Ubuntu, nay Mint, nay Fedora, but only Suse (there was no AntiX distro yet that time.)
With radeon I was only able to install Absolute Linux (click this link)
WITHOUT PASSING ANY SWITCH OR OPTION to the kernel; this means, full install. I don't know how old is your hardware but if it went out to market on years 2008-10 you'd better try install starting Absolute Linux version 12.2, or versions 13.0 and 13.37 if it can install thereon, even version 14 because this one is more complete.
The more secretive hardware manufacturer is, the more headache they bring to their buyers.
There is no assurance that Absolute Linux will succeed with your hardware, but there is higher chance because I am speaking from my own experience. Anyway Absolute Linux is even faster than its mother Slackware, it is already well tuned, and equipped with the best basic applications, from surfing to office suite.
Hope that helps.