Patroit PDC22G5600+XBLK DDR2 memory
 

"With the success of the XBL Performance DDR400 using the Samsung chips
to achieve 2-2-2-5 timings, ram manufacturer Patriot is following up
with their new PDC22G5600+XBLK DDR2 memory. Boasting 3-2-2-4 timings at
533mhz, this new part has been tested to hit 700MHz at 4-3-3-12 for a
PC5600 rating. This was achieved in PDP's labs. This should be some of
the fastest ddr2 available today."

http://www.pro-clockers.com/reviews/.../pdp5600=1.php