Mach Speed uses
Jetway motherboards. Jetway's website often has newer BIOS updates than are available from Mach Speed. Jetway is a top five (Taiwanese) motherboard company that has been around as long as any (1986), mostly in the OEM/ODM business.
I've used a few Mach Speed boards, no complaints here. Expect average (middle rung) performance and overclocking potential common to value segment boards.