Major, I hope you don't mind I post here my results it 4x512 Gskill LE (if you do, please say so and I will delete it)

Rig:
- A64 3500 Winchester (CBBID 0451 EPMW) + XP120 + Delta 120mm 190CFM
- DFI NF4 Ultra-D (Bios 510-2)
- 4x512 GSkill 4400 LE (TCCD 440 chips)
- CM Stacker (case temperature 30-31ºC)

DDR 572 2.5-3-3-8 2T 2.9v Bank Interleave Enabled



DFI memory timings (from top to bottom):
200-D-2.5-3-8-3-16-22-3-3-2-3-2046-1-E-A-0-7-2-9-F-7-256-E-16-7-D

Maybe another day I reach a little higher, but my winchester's ability to overclock is not as good as its memory controller and with the 9x multi it craps out at 2575 with 4 dimms (4 dimms put a great stress on the cpu).

A little off-topic, my best with 2x512.

DDR 604 2.5-3-3-6 1T 2.9v




DFI memory timings (from top to bottom):
200-E-2.5-3-6-3-12-16-3-3-2-3-2336-1-E-A-0-7-2-9-F-6-256-E-16-7-D