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M3a770de oc ?

post #1 of 3
Thread Starter 
mb: m3a770de w/ bios v1.70
cpu: amd3 1055t 2.8ghz
ram: gskill 4 x 2gb ddr3 1600mhz
psu: rosewill 1000w
cpu cooler: scythe katana3

the motherboard has a dummy oc feature which i've tried getting it up to 3.5ghz. it's stable with normal windows/gaming tasks but unstable when running intelburntest (5 passes on standard). i've since tweaked cpu, nb, voltages on cpu and nb and ram freq with cpu still running at 3.5ghz.

cpu fsb/freq: 14x250 (3500mhz)
cpu voltage: 1.4225
nb: x9 2250mhz
nb voltage: 1.225
ram: 1333mhz

it passes the test with intelburntest with 5 passes on standard. however, it'll bsod on the last pass (5 total) on very high. i've had it running for several days with these settings on windows/gaming and no issues. it runs smooth but i'm just not sure if i should be concerned that it won't fully finish 5 passes on very high with intelburntest. i'm also not sure if up'ing the cpu voltage will result in better stability as it's already at a high voltage level. as i run intelburntest the cpu voltage is typically higher than what i've set it at in bios (reaching 1.5v+ during burn test). i use hwmonitor and cpu temps are between 50c to 60c.

does anyone have this motherboard/cpu combo and have successfully stabilized their oc at 3.5ghz or 3.6ghz and at what settings? should i worry about my current 3.5ghz settings as it's stable with windows/gaming and passed 5 on standard with intelburntest?
post #2 of 3
Quote:
i'm also not sure if up'ing the cpu voltage will result in better stability as it's already at a high voltage level. as i run intelburntest the cpu voltage is typically higher than what i've set it at in bios (reaching 1.5v+ during burn test). i use hwmonitor and cpu temps are between 50c to 60c.
The voltage instability may be due to the lower-count 4+1 power phase, it is not able to 'clean up' the power as effectively and provide as stable a voltage.

As such I don't recommend overclocking this 1055T on a board with low-end 4+1 power phase design, most especially if your voltage is hitting 1.5V; it's really not optimal and often unsafe. A Phenom II x6 is very heavy on the VRM system and many instances of overclocking x6 on a 4+1 (even on quality 4+1 phase but only sometimes) have resulted in a VRM blowing or otherwise failing. You should be fine at stock speed but without another mobo I would avoid pushing much further.
post #3 of 3
Thread Starter 
thanks for the explanation!

i guess i shouldn't have expected too much from a budget asrock mb ($60). i'm surprised i can get it to 3.5ghz with doing my normal everyday tasks on it. with spending several hours with the settings, the cpu/mb combo doesn't like high cpu nb and ht frequencies (10x and above) when pushing the cpu clock. i did try 3.7ghz and lowering nb/ht to 6x and it still choked during intelburntest. i'm happy with 3.5ghz for now.

thanks again!
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