The ReaperX is a massive module, with the thick heat spreader and coolers. It is heavy too. The black heat spreaders give it an aggressive look. With its design, you will be unable to put it in memory sockets next to each other. Fortunately, most motherboards have a pair of sockets for each channel.
The “heatpipes” each run the length of the module inside of the heat spreaders. Heat is extracted from each IC onto the heatpipe, and is cooled by the aluminum fins. If you look closely, each bar has its own set of fins.
The ReaperX has EPP settings for the newest nVidia Chipsets, at 4-4-3-15. Of course, Intel chipsets don't have EPP, so you will have to do some tweaking to get the lower latencies. OCZ's site has links to instructions for fine tuning the Reaper X for the nVidia 680i and the Intel P35 chipset. Basically, tuning for the P35 involves tightening the timings.
The ReaperX runs at 2.1 volts, which has become the standard for high performance DDR2 memory, but the DDR2 standard is still 1.8v… there are lots of motherboards that max out at 1.8v-1.85v, so be aware you may have a problem. Part of my testing will be to see how well the memory runs at lower voltages.