Frostytech posted a review on the Forcetake MARS RAM Cooler

Each Forcetake Mars RAM heatsink is more than just a stamped aluminum plate like a lot of the memory heatspreaders in use by manufacturers themselves. The Mars cooler is in fact two extruded aluminum sections which are clamped together around a U-shaped heatpipe with dense copper fins, and the memory module itself.

Forcetake MARS RAM Cooler Review