The nForce 570 SLI chipset is a modified version of the nForce4 SLI chipset introduced by NVIDIA in 2004. When operating in dual video card mode, only 8 PCI Express lanes are available to each video card. This may not be important today, but in the near future when 4 video cards (Quad-SLI) will be supported it may become an important factor.
GIGABYTE has done an outstanding job in most respects with the M57SLI-S4 motherboard. Performance on the board was below that of the nForce 590 SLI board, but that is to be expected as the 590 is the enthusiast model and the 570 is the mid-range model. Feature-wise, the board has everything you would expect from a modern motherboard today and will perform well for most desktop applications. The board is not the absolute best you can get if you are looking to jumping on the new AM2 bandwagon, but it does have what it takes to get the job done.