Coolamasta --
It's a G0. If you can't get to 3.0 Ghz, 1,334 FSB, 667 DDR with 1:1 ratio and a VCORE of 1.32V, then it suggests to me that they've designed the 1305 BIOS with the Penryn in mind.
Remember what I said about the timing of the releases. Intel released the G0-stepping processors just about the time that ASUS had just released v.1301. But ASUS shows signs of trying to stay a step ahead of Intel in terms of product releases. They no doubt acquire engineering samples of CPUs so they can either tweak their existing product to be ready for the newer processor, or develop a motherboard that will be compatible with it. So there is no certainty that v.1305 was designed with both Penryn and G0-Conroe/Kentstields in mind.
We're trying to second-guess manufacturers, and they're playing a similar game that is both coy and aggressive in the competitive market.
So if you can't get the easy over-clock to 3.0 Ghz with the G0 using BIOS v.1305, drop back to v.1301 and try that.
After my first BIOS disaster in 15 or 20 years of flashing updates, I'm recovering a little from being overly cautious. The Striker Extreme's EZ-Flash bios-subroutine seems to be quite reliable. So you don't have to make a DOS-stub bootable floppy, but only format a floppy and copy the extracted BIOS BIN file to it. For 1301, this would probably be 1301.BIN. You can also use EZ-Flash to back up your 1305 BIOS to another disk, but why bother when you can just download the zip file and save it for later use?
LET'S REVIEW . . . .
You have a G0-Q6600 -- Zalman cooler, even if second-best, is more than adequate for what I'm guessing will be some nice over-clock settings with the Striker -- not stunning, but pretty darn good. (And I imagine you can probably get the Q6600 G0 to 3.4 Ghz later on).
You have high-end Crucial Ballistix RAM. I started with their DDR2-1000 2GB kit, and need to RMA back to Crucial because a module went south just for my volting it at their warranty-recommended max (but tight timings -- to squeeze blood out of a stone.)
I'm currently using Crucial Tracer DDR2-800s. BEFORE I FORGET -- YOUR BOARD WILL RUN ALL MODULES AT "NATIVE-DDR2-800" MODE, EVEN IF SPD /EPP CONTAINS LATENCY SETTINGS FOR THE HIGHER SPEEDS. That's why your CPU-Z is showing "400 Mhz." The double-data-rate is 800.
So when you start (cautiously) overclocking, you would go into BIOS, to the "Extreme Tweaker" submenu, set the first item to "Manual," enter "System Clocks" and set the first three PCI-E items to 100 Mhz if not already set to that, and set the last item to 200 Mhz. This last item is crucial, because if left at "Auto" it will over-clock your PCI_E bus automatically in proportion to the processor over-clock, and you don't want to damage any hardware. I believe it is similar to the "AGP/PCI ratio" setting on ASUS Pentium 4 Springdale and Canterwood motherboards.
You would then enter "FSB and Memory Config," set FSB/Memory Clock mode to [Unlinked], set FSB [QDR] to [1,334], and set MEM [DDR] to 667. Here, you're running your high-end Crucials way below spec in bus speed, but it's a 1:1 ratio with the processor frequency [333.5 CPU and 333.5 memory, or 4 x 333.5 = 1,334 and 2 x 333.5 = 667 -- with "QDR" = 2 x "DDR"]
At this point, leave the Overclocking menu alone, although you may want to explore it. But the Multiplier should be defaulted to 9, and the Memory Timing should show "Auto" for everything.
Go to "Over Voltage" and (carefully) set the VCore voltage to either 1.31875V or 1.32500V. This should be in excess of what the G0 will need, but it's still at well below the maximum spec -- you have about 0.05V wiggle-room before the setting yields "load" readings that will exceed 1.35V.
I recommend setting the Memory Voltage to 2.0V initially -- and you wouldn't hurt by starting at 2.1V. The Crucials recommended maximum is 2.2V, and that's about three notches above 2.1. Of course, you could leave the memory at "Auto" because the latencies and command-rate are still set to "auto," so the default should probably work.
In the other menus, set all "Spread Spectrum" to disabled, set "Vanderpool" to disabled, set SpeedStep, Thermal Control to disabled, Enhanced C1 to disabled -- leave the other settings in that menu alone. The remainder under "Advanced" is up to you -- you'll want to set Primary Display Adapter to "PCI_E" -- Plug-n-Play for Win XP should probably be "Yes". If you have another audio card, disable "HD Audio."
The other voltages -- you can try them at "Auto," but it won't hurt to bump up 1.2V_HT to 1.30 -- probably the same for NB core and CPU_VTT. At this initial 3.0 Ghz setting, I leave the Southbridge set to "Auto".
With these settings, if the system doesn't even post, you know you want to go back to BIOS 1301. If it posts and runs MEMTEST86+, but shows errors, you might want to fix or bump up the memory voltage. If it boots to Windows, and PRIME95 errors occur, or if it freezes requiring a Reset, -- BIOS version 1301 is probably needed.
If you get into a "lockup" and can't get the system to boot into BIOS again, follow the procedure for enabling and using the CLR_CMOS button. Then on anothr computer or with this one at all "Auto" settings -- download the v.1301 BIOS if you need to and prepare a floppy.
EZ FLASH is on the "Tools" menu.
Once you have a stable setting at 3.0 GHz, 1:1, 1,334 / 667, several hours running PRIME95 BLEND test, you can experiment with the other divider ratios, or you can try for 3.15 Ghz 1:1, 1,400 /700 . . . . . Excelsior! Once you have the voltage requirements for any or all of several 1:1 over-clocks, you can see what happens with 4:5 (or other ratios) to push your memory closer to their full spec. You can also run them under spec and start trimming down the latencies. Those modules should have default values identical to the Tracer DDR2-800's -- so you should be able to run them even tighter (like me) between DDR2-800 and DDR2-875 with timings 4,3,4,9 (800 Mhz) and loosened to 4,4,4,10 above maybe 820. I'd say the possibility of tighter timings with speeds at 900 or above is also promising, but I recommend voltage settings at 2.175 or lower. You can ask around -- running them at 2.2 or higher is risky.
I'd see what you can do with multiplier 9 first. We've tried several lower multipliers on this board, but I'm inclined to stick with the stock value. YOU CAN test the limits of your memory subsystem first by dropping the multiplier all the way and running up the FSB, but since there is likely a BIOS issue here regarding your choice of processors, best to try the 3.0 GHz clocking first with these or similar settings -- get that out of the way.