A typical workstation/server motherboard can take in 4 memory modules.
Above-average ones can take 8.
The dual-cpu mobos can take 16.
And then there are specialized boards that can take more than that.
An ECC REG memory module can go as high as 16GB.
16GB x 16 = 256GB.
For that guy to have 96GG is just normal.

2x GTX 570 setups are called SLI-setup. You can put together 2-4 GPUs in 1 machine enabling upto 4x graphic performance. Although having GTX 570 on a workstation is just mediocre, maybe he's using it on other things and not just for CAD/design/3D, He could have went with a Quadro of comparable price and have better performance but then again he could have bought those 570s here...