Furthermore, the SATA ports are lined up above the primary PCI Express x16 port in two rows.
The Asrock H55M Pro features only five onboard SATA ports rather than the full six.
This is because the sixth port has been relocated to the I/O panel where it provides eSATA support.

The H55M Pro also features a pair of PCI Express x16 slots.
Like most H55 motherboards, Asrock decided not to provide the power circuitry with any kind of cooling.
The only heatsink you will find on this motherboard is located on the H55 chip.
There are also a DVI, VGA and HDMI connectors, with the only thing missing here being DisplayPort.
Overall the Asrock H55M Pro is a well equipped motherboard, especially given the relatively low price tag.