C-341 and C-542, both of which are compatible with motherboards that have rear-facing power and data cable connections. With the bottom-mounted power supply, that puts the PCIe ports on the top of the case instead of the bottom, which might make heat management a lot easier— you can exhaust those fans right out of the top of the enclosure. With the bottom-mounted power supply, that puts the PCIe ports on the top of the case instead of the bottom, which might make heat management a lot easier— you can exhaust those fans right out of the top of the enclosure