The motherboard has four memory slots/modules and each DIMM can hold a 4 GB RAM module, for a total of 16 GB. So you can put four sticks of RAM in it, the largest the sticks can be is 4 GB each. Here is the page for the motherboard, click on the "Specification" tab for more detail. Contrary to imomun, MSI says the board will only support 16 GB max.
It says the max CPU it will support is a Phenom II X6 (the six-core Thuban CPU). I'm not an expert on AMD CPUs, I haven't used them since Intel came out with the Core 2 Duo, but this seems like an older motherboard.
This page lists all of the CPUs that the motherboard will support. If the CPU is not on here, it won't work.
It depends on whether the motherboard is an 760GM-E51 (FX), which supports 32 GB RAM and the FX series of CPUs, or just an 760GM-E51, which only supports 16 GB of RAM and does not support the FX series of processors.