This water block is rated for 200 watts of heat dissipation, and
the G stands for gold. (Hence the 200G). The CPU-200G measures 1.9" x 2.4" x 0.6" (8.2cm x 6.3cm x 2.4cm). Inside the block there are small pyramid shaped bumps designed to increase overall surface area as well as to create turbulence, characteristics that
should increase its cooling ability.
The block has a 7 ounce (198.4g) solid copper base plated with 21k
gold, polished to a very nice shine.