In pure performance terms, the cheaper Gigabyte board manages to hold its own against pricier Asus mobos, coming out slightly ahead at the same clockspeeds, in fact. Where it falls down a little is in the overclocking stakes. The X58-USB3 hits a limit of 4.2GHz, while the Asus P6X58D-E was able to push that to 4.32GHz. Still, bargain boards aren't usually bought for their overclocking potential…

CPU rendering performance
Cinebench 11.5 – Index: higher is better
X58-USB3 – 50
P6X58D-E – 50

Video encoding performance
X264 v3 – FPS: higher is better
X58-USB3 – 27.8
P6X58D-E – 27.6

Gaming performance
World in Conflict – FPS: higher is better
X58-USB3 – 269
P6X58D-E – 264