I've got the same motherboard, and it's perfectly OK to overclock on it; Biostar even encourages its use in such applications. But I'm using a 1035T with the FSB at 256 and still using the Turbo Core feature, and it's 100 percent Prime stable for 24 hours, at 1.28v, up to 1.39 under load. I've seen cores turbo up to speeds of near 4 GHz with no issues. Seeing as how a 1045T is presumably a little better quality CPU...
One thing I might suggest, and I know this is going to sound weird, is that I changed the memory configuration to a lower speed and the system became unstable. So I switched it back to default (DDR-1333), and just ran the memory overclocked, with a slight vdimm boost for stability (although I'm not sure this RAM even needs it). My 1333 RAM runs at 1707 MHz with no problems.
There is no way you should be having to disable two cores and jolt 1.58v into any Thuban to get it to run 800 MHz over stock. In fact, you should never run a Thuban on more than about 1.45v at all.
If your RAM is up to running overclocked, try changing that setting back to default and see if that helps you.








