The XSPC RayStorm High Performance Acetal CPU Liquid Cooling Block is a performance based CPU liquid cooling block for AMD Series Socket AM2, AM2+, AM3 and FM1 motherboards. With G1/4 threads and specifically designed for multi-core CPU's this block is a great upgrade! Compatible with larger compression fittings (1/2 x 3/4 compatible) you can install this into any existing build or start of a new system with a top of the line block. The Raystorm has support for 4 x 3mm LEDs making color customization easy. The RayStorm tested an incredibly low restriction rate compared to other top contenders and shouldn't be taken lightly. This block is a top performer and shows up admirably in the thermal department. Combining these together gives a great block at an affordable price!