This is a testimonial from a recent customer:

"Test on amd system i put together - barton 2500+, epox 8rda3+ mobo, 1 gig geil ddr 400 ram, ati 9800 pro video card.

overclocked to 3600+ speeds

White Water block with poly top from Dtek customs (which was the best i tested over many other water blocks i used from danger den to innovatek) 31-33 C idle, 36-38 c load temps, ambient room temp at 27c
with the polar flo - 29-32 c idle , load 34-36 c, 27 c room temp
I noticed a few degrees celcius diff., all tested on overclock speeds of 3600+, stock speeds must be at least 5 degrees c cooler, anyways i just wanted to let you know thank you again, you made a beautiful and hi performing block, and i cant wait for you guys to get gpu coolers and reservoirs, etc.

- James"

Everyone is welcome to post their results!

Best to all.