USB performance
Our USB transfer speed tests were conducted with a USB 2.0/Firewire external hard drive enclosure connected to a 7200RPM Seagate Barracuda 7200.7 hard drive. We tested with HD Tach 3.01's 8MB zone setting.

The P35 Platinum somehow manages marginally higher USB burst and write speeds than the rest of the pack, which sticks pretty close together.

Firewire performance
Our Firewire transfer speed tests were conducted with the same external enclosure and hard drive as our USB transfer speed tests.

Firewire performance is tight, at least for the Asus and Gigabyte boards. The IP35 Pro and P35 Platinum trail here, with the latter turning in the slowest transfer rates in each test.