Phoronix posted a review on the ECS Elitegroup P55H-A running under Linux

Back in September we published a launch-day Linux preview of Intel's Lynnfield processors and provided Core i5 / Core i7 benchmarks. With that initial testing of the Lynnfield processors and the new Intel P55 Chipset we had used an Intel DP55KG "Kingsberg" motherboard, but since then many P55 motherboards from different vendors have flooded the market. One of the P55 motherboards to be introduced for the budget-conscious consumer is the P55H-A, which comes from ECS Elitegroup. This motherboard is very reasonably priced while offering support for up to DDR3-2200MHz memory (in an overclock mode), solid capacitors, dual PCI Express x16 slots, and S/PDIF audio support.

ECS Elitegroup P55H-A Review