Overclocking: Fatal Error (Rounding)

dr. sarf

dr. sarf

dr. sarf

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Been overclocking my AMD 6000+, been stable up until 3.2Ghz.
Running Prime 95 and after a few short seconds I get the error:

FATAL ERROR: Rounding was 0.4921875, expected less than 0.4
Hardware failure detected, consult stress.txt file.

Heres CPU-Z

screendump.jpg


If anyone can tell me how this can be overcome? The PC seems otherwise stable, just wont go through the stress test. Thanks
 
Stable how? I windows? You tried gamin? If Prime 95 dies after a few seconds then IMO either your CPU or RAM (does 95 do RAM?) certainly isn't stable.
 
Yeah just in windows, not tried it in gaming! :rolleyes:
I'll try it with a bit more voltage, if I dont reply, I've killed the PC lol
 
It's not stable then as a desktop environment won't stress the CPU or RAM. What is your vcore set to in BIOS? I know sometimes CPU-Z can report a different number.
 
Hi yes, it is different to CPUZ. Core in bios is now set to 1.40v, upped from 1.35 and 1.375. At 1.4v, it is still unstable at 3.212Ghz.
Bit nervous of increasing voltage any further. Is that definately the problem? And how far can you safely push the voltage?
Cheers Guys.
 
weescott said:
Thats a memory error. Maybe your ram is too tight or pushed too far. Up the ram voltage or slacken timings.
Click to expand...

Not necessarily, have seen that error a lot on vcore starved cpus and starved chipsets, could be heat too. a lot of the time its memory with that kind of rounding error but not 100%.
 
If it's a big hassle to achieve an extra 200MHz and as you don't know much about overclocking you're probably better to just leave it running at it's defaults. A 200MHz increase shouldn't really require any tweaks except perhaps a vcore increase which you've tried or perhaps running the memory on a divider in case it can't go much higher than stock speeds.

Does Prime95 fail when running the system at it's defaults?
 
Hi guys. The temperature is fine, idling at about 36dg and and about 48dg under load. Tried the voltage increase by a few increments but was stull unstable. Yeah I only know some basic overclocking stuff, but why does changing cpu fsb & voltage affect what my ram is doing?
I'm running Crucial Ballistix tracer, surely that should be able to cope with any tweaking?

Cheers
 
sd4.jpg


OK, got it running stable in Prime at 3.212Ghz.
Upped core voltage from 1.35v to 1.375v
Upped Ram voltage by 0.25v

Will run Prime for few hours and then try and increase again? Been going 10 mins now without error, whereas before it showed an error after 3-4 seconds.

edit: same error after 17mins :(
 
Last edited:
In my previous experience you should run 5-5-5-15 timings until you find max CPU and Mem speed, then try tightening them to 4-4-4-12 maybe lower and then finally 1T.

Quicker timings on RAM generally means you have to decrease the RAM speed and vise versa.
 
There should be a section in your BIOS somewhere that allows you to change memory timings. Looking at your CPU-Z screenshot they are almost certainly set at defaults atm which means that the BIOS will put them at what it thinks it's best, which usually means that it will put stupid timings on which RAM can't run at when overclocked.

Have a look in your BIOS (they are all different, post what board you have and I'm sure someone with the same board could tell you) and see if you can find it.
 
Thanks for that MilanoChris. Yeah I had a good poke around in Bios and my M.I.T (Motherboard Intelligent Tweaker) but cant find it. I have the Gigabyte GA-M57SLI-S4 mobo.
Cheers
 
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