i had a pair of TCCDs, but i have never tried with those kind of timings before.
the tightest ive ever gone is around 2.3-3-4. and even that needed an increment in voltage.
well, this is scouflys' area, and he should know how to guide u thru this, but in anycase, do u think its the bios of the board? or do u think there is too little vdimm?