If your board only goes down to 1.2875 --ouch. time for a new board.
You gave it your best shot. If you haven't already sold your E6320, slap it on that board and Craigslist it to pay for a new one.
Not a lot of 775 DDR2 boards for overclocking left on the market. Here's one possibility if you can find it, though:
ASUS P5Q Pro Turbo
I'd look for an Intel P45 chipset mainboard. Gigabyte, ASUS, and MSI are all brands I'd consider. Brands I avoid (no disrespect to those who own them) are ECS/EliteGroup, Asrock, and Foxconn. At this point, I wouldn't get DFI either, because they're shutting down their consumer mainboard business, so support is very hit-or-miss.
Your second option is to sell the RAM too, and get DDR3. This would allow you a couple of other options, like the very good Gigabyte GA EP45T-USB3P and it would set you up for easier upgrades down the road.
Gigabyte GA EP45T-USB3PEdited by LoneWolf15 - 6/12/10 at 5:54am