ECS 890GXM-A basic feature set is similar to any AMD 890GX board you see in the market. By virtue of the chipset AMD 890GX+SB850, it supports the AMD Radeon HD 4290 DX10.1 graphics that clocks at 700MHz with sideport memory. The SB850 also supports 6 ports of SATA 6Gbps in RAID 0,1,5,10 configuration. The chipset on board officially supports the future 6 core processor Thuban.
The board supports 4 DDR3 slots of up to 32GB of DDR3-1600(OC)/1333/1066/800 memory. ECS A890GXM-A being a board from the Black Label series definitely has something to horn about. This board features Dual GigaLAN, 15u Gold Contact, eJIFFY, Cooltech III, 4most Display (HDMI,DVI-D, D-SUB and DisplayPort), eSATA. There are also power on/off, reset buttons on the PCB and a Clear CMOS button at the back panel which aren’t found on other boards we tested so far. Although most manufacturers will go for USB 3.0, ECS left it out on board but has a version of the board that bundles in the add on card to support it.
The board also comes with 3 full length PCIe 2.0 slots supporting CrossFire X. So you have the extra PCIe 2.0×4 slot for an additional graphics card for 3 way crossfire. In addition, the board also has quite a flexible BIOS which allows you to increase the voltage levels applied to the CPU, NB etc.
http://www.ocworkbench.com/2010/ECS/A890GXM-A-Review/g1.htm