The earlier review saying you needed Vista to make the Crossfire work is inaccurate. (Up and running nicely on XP x64 and was doing the same on XP 32bit.) However, 2 things about this sucker ''suck'' in installation under XP.The drivers for RAID and ACHI are a pain to install. The directions in the Gigabyte mobo manual are somewhat opaque as well. The process to unpack ARJ archive files is incorrect. (It can be worked around if you wish to retarget the run.bat file.)Also, the molex connectors for the case fans are the crappiest I've EVER seen!!! (I know, cheaply, if not necessarily, easily replaced.) Regardless, if you're willing and able to push through the install process and tolerate those molex connectors, it's a VERY good machine for the money. It looks good, it's quiet AND fast!!BTW, mine was shipped with a 4400 Athlon. Lastly, simply making the DVD driver disk bootable would have saved me HOURS of headaches!!. Listen well, Gigabyte!!!