With the restriction of space, most of the microATX motherboards have to loss part of the configurations and performance, but the "small = low performance" myth has been completely broken by LANParty. Within the limited space, the best Bus speed of JR P45-T2RS is up to 685MHz, and the performance of Super Pi 1M is second to none; it surpasses not only the micorATX, but also most of the ATX-designed motherboard. It can be said without fear of exaggeration that JR P45-T2RS is the most powerful microATX in the history.
Why does LANParty JR P45-T2RS have such amazing performance under the restricted conditions? During the process of design, the majority of micorATX motherboards often suffer considerable signal interference because of the lack of space; therefore, the conservative wiring approach is often adopted to pursue stability at the expense of performance. However, the LANParty R & D team hold that "stability is merely a basic element", while the pursuit of stronger performance is the only objective. It’s under such concept that the true overclocking microATX motherboard has been invented.
Source: TweakTown