Moved up from a Q6600 G0 + P5n32-E SLI

Current Rig:

Striker II Extreme 790i Ultra
Intel Q9650 / VID 1.25 / Revision E0 / Arctic Freezer Pro 7 / OCZ Freeze
2* 2GB DDR3 OCZ FLEX EX PC3-16000 2000MHZ
Thermaltake 750W Modular
MSI 280GTX (Factory OC)
Antec 900

I've currently got the CPU sitting at 3.6Ghz (400*9). This is linked and synced with the RAM at 1600Mhz (7-7-7-24-2T 2.0v) and working flawlessly. What I am trying to do is get the RAM to run at it's rated speed. No matter what I do I cannot get the system to boot if the RAM is set at 2000mhz. This was on BIOS 1106. I've since flashed to 1203 but still no go. Can I actually get the RAM to run at 2000MHZ or is that just marketing gibberish on Asus' part?!

The manufacturer timings state 8-8-8-30 at 2000mhz at 2.0v, but could these be improved? I've got a couple of Antec spotcools, one pointed at the ram, the other towards the SB to help cooling. I've tried the RAM in A1/B1 and A2/B2. Here are some brief voltage settings i've got:

CPU: 1.2625-->1.3
Mem: 2.10
NB: 1.40-->1.46
SB: 1.50-->1.55

I've bumped up CPU/NB/SB and tried to experiment to see if I can boot but it always freezes on the LCD poster saying 'DET DRAM'. I've had trouble with OCZ and Asus before so I even tried some Patriot Viper 2000MHz RAM. Same here it was no go. Works no problems at 1600MHz even if I tighten the timings from standard, but will not POST at 2000MHz. Should I have just bought 1600MHz RAM and saved the money? Or is my board a bit weak? Any help appreciated guys.