What would a new motherboard offer that this one does not? This has all the settings I could want, plus the option to go SLI if I ever want to?
The only thing I can see a new motherboard doing is allowing me to use the newer i7 chips. and possibly 1/2 multiplier settings like 8.5x.
The best thing I can think of is to try and make certain the next CPU I get has an unlocked multiplier.
And get better memory higher than the 4 sticks of 800MHz (PC2 6400) I got now
The nVidia chipset boards are buggy and difficult to OC. They also run pretty hot. Intel chipset boards OC much better and are more stable overall. You won't be able to get 0.5x multis w/ that CPU; it's a property of the CPU, not the mobo. The 775 Intel boards do not have SLI, but that's also a waste IMO. Stick w/ a single card and just trade-up if you want more power. At 1366x768 you could get by w/ a card that runs a lot cooler and uses a lot less power, and is still more powerful than the old-school 8800GTX. BTW, unlocked multi chips cost ~$1,000. You can do just fine w/ regular $50-$300 chips if you invest the time to learn the quirks of your setup.
But back to your situation at hand. It's really hard for me to tell if you're doing this systematically or if you're just increasing voltages as high as you feel comfortable all around and hoping that will solve everything. It seems like the latter. More voltage is not always better! And if you just run it maxed out and get a BSOD you will have no idea where to go look for a solution.
Most likely your issue is in the NB or RAM or some combo of them.
Go back to 6x multi on CPU (we want to eliminate the CPU variable), run it w/ the RAM 1:1 and loose timings. Put all voltages back to default except RAM (set manually to it's spec) and CPU (set manually to 1.4v). Try 400FSB and run Blend. Does it fail? If so, try each setting (all of them, not just voltages!) one at a time and see if you can make it last longer. Also try GTL settings if you have them; remember more does not always equal better! Try up and down to see how things react. If it doesn't fail at 400FSB, try 420FSB. Rinse, repeat.
I know the NB runs hot on these boards, so you should check that temp while testing and let us know how hot it's getting. You might need to re-seat the NB HS to get this thing to cooperate if the NB temps are too high.
Follow my advice above and let us know if you hit a snag on your way to getting 450FSB stable (pass blend 8hrs+). AFTER that you can worry about trying 7x, 8x, and then 9x multis to get the CPU speed up where you want it. That part will be easy once you get the NB stable.
