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P95 Rounding error, Core 4 quits on 1045T

post #1 of 11
Thread Starter 
So I'm playing around with the clocks on my 1045T, I can get it perfectly stable at around 3876mhz, but after about 20 mins running P95 Small FFT's, Core 05 will just quit, and when I look, it says there is a rounding error.

FATAL ERROR: Rounding was 0.5, expected less than 0.4

What exactly does this mean? I tried upping my voltage, but I'm not sure if I want to go more than 1.35v. Any advice? Thanks!
post #2 of 11

It means that your system isn't stable. I don't know AMD overclocking, but I know that this means that you have to keep working towards stabilizing your system. So, it's not perfectly stable at all. It's far from it because 20 minutes until a failure in Prime95 is pretty bad.

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(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #3 of 11
Quote:
Originally Posted by KillThePancake View Post

So I'm playing around with the clocks on my 1045T, I can get it perfectly stable at around 3876mhz, but after about 20 mins running P95 Small FFT's, Core 05 will just quit, and when I look, it says there is a rounding error.

FATAL ERROR: Rounding was 0.5, expected less than 0.4

What exactly does this mean? I tried upping my voltage, but I'm not sure if I want to go more than 1.35v. Any advice? Thanks!

Try upping the cpu-NB voltage a notch, and same with your dram voltage.
    
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post #4 of 11
Thread Starter 
So just bump up the voltages on the NB and memory slightly?
post #5 of 11
Quote:
Originally Posted by KillThePancake View Post

So just bump up the voltages on the NB and memory slightly?

 

If that's how it's done, then I would say Yeah. I only know Intel overclocking.

It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #6 of 11
Thread Starter 
Alright, I'll try it out in a bit
post #7 of 11
In my experience, cores dropping with rounding errors is usually memory. Try lowering your memory frequency to rule it out.
post #8 of 11
Thread Starter 
Okay, I'll try that out. Everytime I up the base clock, the RAM clock goes up as well. Just bumped my NB to 1.4250 and my RAM to 1.5v, and now I get this:


FATAL ERROR: Final result was 43494927, expected: A48AC5E3.

Core 5 still drops at 3790mhz and 1.3500 vcore.
post #9 of 11
Thread Starter 
Well I dropped the ram speed below 1333mhz where is thuban draws the line and the core still drops about 15 minutes in
post #10 of 11
Just curious, hows your temps? At work, we had some AMD chips dropping cores after a certain temp, but they were also APUs..
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