I think it is the CK3 that causes the computer to freeze. I remember using the onboard SATA port and it still froze? If you plug in a damaged USB into the computer, it can freeze your system until you remove it.
Always use the latest drivers and here is what may help with freezing -
http://www.tiaowiki.com/forums/xbox-360-hardware-talk/this-may-help-with-ck3-freezing-issues/
This is the latest driver for VIA that is supported -
http://www.viaarena.com/Driver/vraid_driver_v550b.zip It will make your VIA show up as "VIA VT
6421 RAID Controller" correctly in Device Manager.
I have experienced CK3 freezing with the No-freeze driver. I successfully flashed my drive without it. After you swap and enable the No-freeze driver, then you don't have to remove the new driver.