The thing I really like about MSI boards is the way they space the PCI-E slots. Instead of putting them 1 slot apart, as the majority of mobo manufacturers do, they put them 2 slots apart so that if you're using two dual-slot graphics cards, the topmost card can actually get some airflow. Contrast that with the boards from Asus and Gigabyte, where twin dual-slot cards are severely cramped, and you'll see what I mean.
I must also say it's a good looking board, except for the fact that it's a bit heavy on the black. Red or orange PCI-E/memory slots would've been cool.
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The QuadFather: 4x4x4x4
4 cores (QX9650) / 4 GPUs (2x 9800 GX2) / 4x 2GB DDR2-800 / 4 hard disks (quad 320GB Seagates, RAID-5)