I am running Asus Striker extreme with 2GB CorsairTwinX XMS2 Dominator(CAS 3-4-3-9) and Quad Core CPU qx6700.

After a period of stable operating and having read as much as I could about overclocking I decided (with a hindsight, prematurely) to dip my toes in overclocking.

I set the FSB to modest 1400mhz, cpu multiplier to 9 (so 350 * 9 = 3.015ghz). FSB : DRAM = 3:2 so dram freq was 933mhz. I also set the ram to 4-4-4-12. What I now realise (after more reading) that by increasing frequency and lowering timing at the same I might have overcooked things(trying to find a solution to my problem I came across considerably more information then before)

Voltages were set as follows (a recommendation from one of the sites I found previously)
# VCore - 1.5V
# Memory Voltage - 2.4V
# 1.2V HT Voltage - 1.25V
# NB Core Voltage - 1.45V
# SB Core Voltage - 1.60V
# CPU VTT Voltage - 1.35V

I started Windows fine, ran CPU-Z which confirmed the various frequencies. I ran the Asus probe. It warned against VTT voltage being 1.41v and MB temp being 35 degrees but that's about it.
I used an Excel macro running an infinite loop of mathematical calculation to push CPU 60 60% on 4 cores. CPU temp was always less then 60 (and much lower at idel - cannot remember exactly how much). The memory has the supplied fan mounted and working and it never rose above 40 or so according the the optional temp sensor stuck into it.

My problem is that after shutting down the i cannot even get BIOS running at all (i.e. nothing nut a blank screen) and the LCD post error is DET DRAM. I have tried reseting the CMOS using the internal push switch but no joy. One thing I am going to try latter is starting with one of the modules.

Any ideas? I mean, if I can the BIOS to start then of course I can correct all my wrong doing and start afresh with a step by step approach... not much that I can do with a blank screen.