I noted with DQ6 and Corsair dominator 8500 c5 that you can not change certain timings of DRAM in bios or you will have a faulty post with any value reset to default auto.

If you leave these timings to auto, the MB boots, if you set any value different from auto,even relaxed one, MB hangs.

I am rather sure I can not change the three timings after the classical 5-5-5-15 (first four timings) and the last three of BIOS list.

I can change only from auto the first 4 timings and the 8th.

I use BIOS F4