|That's definitely not a "new" motherboard. You provided a link with all the info, what is it that you don't understand?|
Supports Dual Channel DDR2 800 memory architecture
1. 4 DDR2 DIMM memory slots (supports up to 16GB memory)(Note 1)
2. Supports dual channel DDR2 800/667/533/400 DIMMs
3. Supports 1.8V DDR2 DIMMs
(Note 1) Due to the limitation of Windows 32-bit operating system, when more than 4GB of physical memory is installed, the actual memory available for the operating system will be less than 4GB; Windows 64-bit operating system doesn't have such limitation.
In other words, if you're going to run a 32-bit OS, limit your RAM amount to 4GB DDR2-800. And if you want dual channel mode to kick in, you'll need 2 x 2GB. If you're going to run a 64-bit OS, you can install up to 16GB but do not exceed 4GB per slot. Be aware that DDR2 memory is older technology & more expensive than DDR3.
The board has 4 SATA 3Gb/s connectors & 2 IDE connectors. IDE is pretty much obsolete so you should go with a SATA HDD. As for the brand & capacity of the HDD, that's up to you.