A handy PORT-80 diagnostic LED is placed next to six SATA ports, of which four of them are of 6Gb/s signalling speed (two from the Z77 PCH, two from a ASMedia ASM1061).
The expansion slot configuration on this board is fairly straightforward, with a pair of PCIe 3.0 SLI/CrossfireX capable x16 slots (electrically x16 or x8+x8) and a solidary PCIe 2.0 x4 slot for graphic cards and other uses. Onboard Power/Reset buttons located at the bottom are useful for users running from open-air test beds.
No surprises or potential electrical short hazards behind the board.
The M5G can also gain Thunderbolt connectivity via a separately sold PCIe expansion card (known as ThunderboltEX), which takes up a PCIe x4 slot and connects to a designated header on the motherboard for power and bios signalling. A DisplayPort cable is also provided to allow DP signals to be encapsulated on the Thunderbolt data stream for display purposes.