Corsair XMS2-5400UL
 

Although Corsair's XMS2 TWIN2X1024-8000UL memory modules,
which are rated for 1000MHz compatibility on Intel-based motherboards,
have taken some of the spotlight away from their famed
TWIN2X1024A-5400UL modules, these DDR2-667 modules continue to be
popular with enthusiasts due to their cheaper price point and phenomenal
overclocking abilities. While sticking to its DDR2-675MHz speeds the
memory can run at impressive 3-2-2-8 timings, and when loosening the
timings they can breach the 1GHz barrier. Of course, none other than
Micron's "Fatbody" D9 ICs powers these modules.

Direct Link: http://www.phoronix.com/vr.php?view=4930