Still have an X58 Asus P6T7 MOBO in here.
Never even have had the back plate or many things for the board, I bought it open box off the Egg when they were pretty new, and the board was all I received. Haven't had any problem with it really though over the years.
Finally ended up stopping at a X5680 @ 4.5 after yanking the old I-7 920 out, tested a few others getting there I guess.
Have added a couple SSD's for the OS and upped the RAM to 12, still cooks along pretty well.
Have upped the GPU once, but the MOBO has been in there a long time.