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Question about X3 455

post #1 of 4
Thread Starter 
Hi! I m new here and to overclocking...
I was trying to overclock an AMD X3 455 on a gigabyte MA78GPM-DS2H (latest bios). I have been mainly playing around with the cpu fsb and voltages where necessary, but staying within reasonable bounds. I managed to get a stable linpack benchmark result for fsb: 249, resulting to nice 4.1 ghz, but I had to underclock my memory, using a x4 multiplier, instead of 5.33.

After I got my processor where I could and stable I tried to overclock the memory. I set the multiplier to 5.33 restarted and got a black screen... no POST or anything else. Several restart attempts but no luck, so I reset the CMOS. That got me up and running again, but there is no way I can get back to overclocking I was. Even fsb: 240 seems to be unstable now, resulting in a blue screen of death.

If I don't overclock, linpack and other tests seem fine. Windows memtest seems to be fine as well (overclocked or not). My question is whether I have damaged something and how can I spot what that might be?

The X3 455 is new, but the mobo has been running an older phenom overclocked (about 20% up) for about a year but on really healthy temperatures. I m running vista, with 8 gbs of ddr2 memory. Its kingston hyper-x @ 1066.

P.S. I tried more aggressive voltages after the incident, but that neither got me stable nor kept me on low temperatures (exceeded 70 under linpack), so I abbandonned that quite fast.

edit: The blue screen of death error code is: 0x00000124
Edited by tyran - 3/17/11 at 4:32am
post #2 of 4
did any of your MB temps spike...or could you feel excess heat coming from any of the sinks.
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post #3 of 4
OK well, some AM2+ chips could not run 1066 mode with more than 4 sticks.

If you didnt have the AM3 x3 455 i would have said it was that!

HAve you tried running the RAM at 2.2V not 1.8V as this is what the Kington needs to run 1066 speeds?
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post #4 of 4
Thread Starter 
Thanks for your replies. Regarding temps, I didn't observe anything extreme, but as the problem appeared right after BIOS, I didn't have any measurements, but I presume it was well within specs, as it wasn't under load.

Raising the voltage and setting my RAM to a x5.33 multiplier (that would bring it higher than 1066 given the CPU fsb), was what made the issue to appear (though I doubt caused it!). Right now I run my RAM at 2.025V to have my computer run smoothly (hours of linpack) at an fsb of 235, or roughly 3.9 ghz. Before keeping it up to 245 was piece of cake, now anything above 235 results in a blue screen.

Cheers

PS. Just checked my CPU temp... they are rising to nothing I ve seen before! Under linpack load before it wouldn't get over 65-70 now its above 80!!! Can any kind of damage explain this??? Can the thermal paste evaporate or something? Its only a couple of days on (its tuniq). If I let it cool down it returns to its normal state (each core at around 20-24 degress and the CPU at around 30-34 - the 80+ refers to the that)
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