I have two of those boards, with no problem at all with them. User reviews were ambivalent though, and it took a while for me to decide -- checking the reviews and forums over weeks and months -- that some people may not have had a clear idea of what they're doing. At that point, I decided to take a chance on the board.
At first, I ran with the E6600 CPU, and my over-clocks were coming close to 3.4 Ghz at stock multiplier. At multiplier 8, I think it was not too hard to get to 375 Mhz / ddr= 750, and I'd tried some other 1:1 CPU/DDR settings at lower multipliers -- 400 and ddr=800 were definitely achievable, but not "optimal" for me.
You have a good processor (assuming especially that it's a G0 stepping), all the quirks about voltage settings on the Striker board were worked out by BIOS version 1004, but you have 1305. You have "good" memory with the Crucials.
That doesn't mean that there isn't a problem with some piece of hardware, though.
I'm wondering if you don't have a bad memory module.
You should be able to easily set a 3 Ghz over-clock. Here are my own settings with a B3-stepping Q6600:
VCORE = 1.31875V or approx. 1.32V
VDIMM (Crucial Ballistix 2 x 1GB DDR2-1000) 2.125V
"FSB and Memory" in BIOS: "Unlinked", FSB 1334 and RAM = 667
The recommendation to try a 1.41V VCORE is not wrong, but with that BIOS version, you shouldn't have to do it.
TURN OFF or DISABLE: ALL spread-spectrum. Disable all throttling features like SpeedStep and C1E -- leaving only "execute-dsable bit" enabled.
For starters, (and you could probably get the over-clock with "Auto" settings, even so . . . ) -- set 12.VHT voltage to 1.30V. Set CPU_VTT to 1.35V and NB core to 1.35V. You can keep "Auto" for SB core voltage, or set it at either 1.50 or 1.55V.
Start with the default timings of 5,5,5,15, 2T-command-rate, and just set them manually in BIOS. I'm able to use timings of 3,3,3,6,1T with the DDR2-1000 Crucials. Even with the DDR2-800s, at that FSB speed, you should be able to use settings lower than the spec.
I had seen this problem come up in different ways with bad RAM modules on other systems and earlier technology. Try one module at a time with MEMTEST86+ to see if there's a problem with one of them. Even with Crucials, there is always the possibility that you got a bad one. IF you did, use the lifetime warranty and RMA both modules.
If you can isolate the problem (CPU vs RAM vs motherboard), you should be able to arrange an RMA exchange.
Also, try resetting the CMOS and starting over at all-stock settings before you go any further. FOLLOW THE MOTHERBOARD MANUAL FOR DOING THIS. You have to turn off the system, unplug it, change the CLR_CMOS jumper (to enable the CLR_CMOS switch) if necessary, push the switch once and wait for a while, then push it again. You can either leave the switch enabled, or you can put the jumper back to its default "disabled" setting.