The RAM - System memory consists of two sticks of Crucial PC2700 DDR memory. Here is what each stick looks like.
On the EPoX 8RDA+ motherboard, the DIMM's slots are the 3 black slots circled in blue in the lower right-hand portion of the motherboard.
The EPoX 8RDA+ motherboard has 3 DIMM memory slots, so I'll just be using two of them. The 3 DIMM slots are divided into two banks, which you can actually see by the physical separation of the memory slots on the motherboard. The single memory slot nearest the bottom of the picture is bank 0. The two memory slots above it are bank 1. With two memory modules, the best performance is realized by inserting one memory module in bank 0 and one memory module in bank 1. There's only one memory slot in bank 0 so it's pretty clear that's the one to use. There are two memory slots in bank 1. Most people say it doesn't matter which memory slot is used, but some people insist that the lower of the two, which is DIMM3, gives better performance. That's the one I used, but later on I benchmarked it both ways and learned that performance is the same with either one. And just so you know, best performance is with either two memory modules in separate banks or three memory modules. Different motherboards will group and order the memory slots differently, so consult the owner's manual for your own motherboard for details.
DIMM 1 on the EPoX 8RDA+ is the only DIMM in Bank 0. It's the bottom-most DIMM in the picture. Open the latches on the memory slot so the DIMM memory module can be inserted.
Insert the Crucial PC2700 memory module into the slot. The module can only be installed one way due to the way the module is "keyed" along it's bottom edge with the slot. After it's installed, the back of the module is facing the camera. I have an entire site dedicated to computer memory at Computer Memory Upgrade. Step-by-step instructions on how to install DIMM memory modules begin at Computer Memory Upgrade - DIMM Installation.
Repeating the process with the second Crucial PC2700 memory module into DIMM 3 of Bank 1 leaves the memory slots populated like this.