I'm with Benji Tshi at the GamesCom 2010 to overclock some Kingston DDR3, this is what we achieve so far.

Hardware:
I7 870
P55 UD6 bios 10
DDR3-2333 triple kit (KHX2333C9D3T1, 1Go stick)
DDR3-2400 dual kit (KHX2400C9D3T1, 2 Go stick)
Silverstone 1500w
pink foam memory pot ()

1,58v for vtt
1,88v for vdimm
temperature of memory around -120°C but difficult to have a precise value with this "pot"

2x1Go DDR3-2333 kit:



validation link: http://valid.canardpc.com/show_oc.php?id=1355669


Super Pi 1m @DDR3-3035 C8




Subtimings used




Some photos of the event












this morning we are testing the DDR3-2400 kit