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Rather than a CPU backplate installation hole, the M9’s motherboard plate features a set of bolt-down CPU cooler mounting holes that appear to match Intel’s Socket 423 reference design. That could make the M9 a perfect chassis for adding monster-sized cooling to Intel’s Willamette-based Pentium 4.
The M9’s nine 5.25” bays allow super-long expansion cards to be fitted through the drive bays all the way to the front panel. Screw-free drive clips affix 5.25” devices and factory-installed bay adapters, while screw-free card clips can hold most single-slot cards.
A 5.25” to 3.5” external drive adapter fills the top bay, complimenting the installation kit’s 5.25” to 3.5” front panel plate.
A 3.5” hard drive cage fills the bottom three external bays, kept cool by an attached intake fan. Break-away EMI shields that cover remaining bays include screw tabs for re-installation.
Anyone who would like to fit more than three hard drives into three 5.25” bays can easily replace the existing cage with a four-drive backplane. Tabs that separate each bay prevent most 5-drive, 3-bay backplanes from fitting the unmodified case.