This is the OCZ Reaper HPC Edition 4GB Dual Channel Desktop Memory Kit, the PC2 6400 memory is in 2 x 2GB with 240-Pin DDR2 SDRAM DDR2 800. They have good potential to absorb oodles of heat but sadly are on the big side and can end of very close to CPU and NB.

New Egg has this 4GB Dual Channel Desktop Memory Kit at $109.99 or $84.99 after $25.00 Mail-In Rebate.