GA-880GA-UD3H board v2.1 overclocking with ddr3 1333

[doodle]

as title says I cant get this motherboard past 274 fsb with memory devider 4.00 to run at 1100 or over.I allso use amd thuban 1055T x6 (125w) and ddr3 1333 value ram Iknow thats all Icould get at the time.
So my question is is this a limitation when using that devider.
tanks for any help.
forgot to say that I have had this cpu running at 4.2 with just over 1.4volts.but on a ddr2 motherboard.

[Manicdan]

did you lower the NB and HT speeds?

274 bus is 2740mhz on the NB and HT, which both might not like being that high

[doodle]

yes I drop them down, tried x8 x7 x6 x5 still would not boot and with bios resetting to defaults.

[Manicdan]

ok, i would try to drop the bus by a few mhz and do some stability test for a good hour before bumping it up, and the just go 1mhz at a time to see when instability kicks in.

do you set the timings yourself, or let it automatically do that?

[doodle]

well thats what I meen its fine at 274fsb ,but the moment I put it to 275 fsb it will reset to bios defualts after two long beeps
Iset memory timings manually as at auto the timings go to 6-6-615

[doodle]

to get past 275 I just found that if i put Bank cycle time(TRC) in bios to 26 clocks or lower ,is this normal

[dinos22]

interesting, how much past it have you gone? what was the auto value given?

[doodle]

auto 20 clocks and if i set it to 24 can get to boot at 277 but no higher

well disabled channel interleaving and i now get higher no by much (280)

[BeepBeep2]

Hey guys, guess what?

My rev 1 board does the exact same thing.

200-270 HTT - Stable

270+ - Loses stability

274 HTT, in windows, AMD Overdrive. Mouse starts jumping all over the screen.

Set 275. Nothing changes. Same mouse jumping everywhich way on it's own.

Set 276. Screen goes black, followed by a nice "Out Of Range" message on my monitor, and a nice long beep from the board.

*RESET* BIOS is corrupt, automatically recovers itself from the backup bios, proceeds into loading bios F1.

@doodle

Disabling channel interleaving brings quite a loss in performance...

[doodle]

well its the only thing that lets me go past 275 currently at 280 fsb and running fine at the moment will have to stress test and see
bank interleave:enabled
channel interleaving:disabled