6x1GB @DDR3-1688Mhz 8-8-8-24 1T at 1.815v bios (DMM measured 1.820v real)
Bumped Bclk to 211 and reduced
vdimm from 1.830v bios to 1.815v bios (DMM = 1.820v real) for DDR3-1688Mhz 8-8-8-24 1T.
Slightly faster 32M Pi times than 3x1GB D9GTR at same main timings even though below 6x1GB was done with considerably looser subtimings for tRFC, tWTP, tRRD and tFAW in bios. Will try tighter timings later.
Everest SPD and bandwidth
LinX 10 passes 
Best I can do keeping voltages the same
@879Mhz 8-8-8-24 1T at 1.815v bios (1.820v real) 