Mushkin 996529 DDR2 UDIMM (2x1GB) 2GB PC2-6400 5-5-5-12 NONE 1.8V Compatible Frequency This product is engineered to operate at the optimum frequency for compatibility with your system. Compatible Timings This product is programmed to use timings that offer maximum compatibility with your system and original memory. Dual Channel Kit Engineered for dual-channel architecture. Lifetime Warranty Quality guaranteed - we offer a lifetime warranty on this product and genuine, unmatched service and support. Type: DDR2 Voltage: 1.8V Speed Spec: PC2-6400 Frequency: 800MHz Capacity Kit Type: Dual Kit Module Size: 1GB Module Build: 128Mx64 Chipset Density: 64Mx8 Timings tCL: 5 tRCD: 5 tRP: 5 tRAS: 12 Cooling Technology Heatsink: None

Mushkin Radioactive 997006 DDR3 UDIMM (2x4GB) 8GB PC3-12800  7-9-8-24 FROSTBYTE 1.65V Simple, effective engineering. Sometimes simplicity delivers great results. In the case of the world-renowned Mushkin Enhanced FrostByte™ heatsink, you can expect top-quality memory cooling in an incredibly effective design. Every nook, cranny and curve on the FrostByte™ serves an important purpose. The distinctive upper cage provides greater surface area for heat dissipation, as well as a turbulence pocket for greater airflow. In addition, the pressure clips combine with a top-quality thermal pad to provide optimal thermal transfer. With memory modules outfitted with a FrostByte™ heatsink, you can expect reliable cooling with a classic, elegant appearance. * Dual Channel Kit Engineered for dual-channel... Less