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New Skylake 6700k computer - Prime95 issue

post #1 of 4
Thread Starter 
Dear all

Last Monday I received my new gaming pc from the Netherlands (I live in Luxembourg) and I tried Prime95 (64bit) Blend test (with the default 8 workers), to see if everything was stable.

However after 2 hours one of the workers stopped with the following message: "FATAL ERROR: Rounding was 7.756809404e+013, expected less than 0.4"

The other 7 workers went on fine for another 10 hours when I stopped them myself.

Less than 5 hours later I runned another 14 hour+ Prime95 Blend session. This time with the front door of the Define R5 case open. No errors at all!

I also runned a stresstest for my SSD and the HCI memtest for 500% using 8 threats to max out the CPU as well. No errors either.

How is this possible? Was there just a small error with the test or with another software interfering? Or wasn't there enough air in the case? The R5 has small intake holes on the sides of the door which I assumed was enough although this might not have been the case for the 2x140mm fromt fans (in addition to the one in the bottom) during the stress test.

Also, if I would run 2 more 14+ hour Prime95 blend tests and a Memtest86 and this wouldn't return any issues, would it be safe to assume there is nothing wrong or it was just a minor heating issue?

My specs:
Intel Skylake 6700k @stock 4GHZ
Mugen-4 PCGH tower cooler (with 2x120 fan)
Corsair DDR4 LPX 2666 16GB (4x4GB)
Msi Z170A gaming M5
Msi GTX 980 ti Gaming 6G
Samsung 850 Pro 256
Case: Fractal Define R5 with 3 intake (2x front and 1 bottom) and 1 outtake fans (back)
Corsair RM750i 750W 80 plus gold
Windows 10 PRO 64bit

Nothing is overclocked.

Thanks a million!!
post #2 of 4
It's not the first skylake i see failing the P95 at stock. Something tells me it might be an issue with P95. Did you monitor the temps during the test?
Masterrace again
(10 items)
 
  
CPUMotherboardGraphicsRAM
6700K Asrock Z170 Extreme4 XFX R9 390 8Gb 8Gb Kingston HyperX 
Hard DriveHard DriveCoolingOS
Crucial MX200 M.2 250Gb Western digital blue 1Tb Noctua NH-U12S Windows 10 
PowerAudio
Aerocool Templarius Imperator 750W Asus Xonar DX 
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Masterrace again
(10 items)
 
  
CPUMotherboardGraphicsRAM
6700K Asrock Z170 Extreme4 XFX R9 390 8Gb 8Gb Kingston HyperX 
Hard DriveHard DriveCoolingOS
Crucial MX200 M.2 250Gb Western digital blue 1Tb Noctua NH-U12S Windows 10 
PowerAudio
Aerocool Templarius Imperator 750W Asus Xonar DX 
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post #3 of 4
I'd try Aida 64.
Hot n Bothered
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5 4690k Asus Sabertooth Z97 MkII 2 EVGA GTX 980 FTW PNY 
RAMHard DriveHard DriveOptical Drive
Kingston 2x Kingston v300 120gb RAID 0 WD Blue ASUS 
CoolingOSMonitorPower
Cooler Master 212 Evo Windows 7 HP w2408h NZXT HALE82 V2 
CaseOther
Corsair 450D I have pretty lights.  
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Hot n Bothered
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5 4690k Asus Sabertooth Z97 MkII 2 EVGA GTX 980 FTW PNY 
RAMHard DriveHard DriveOptical Drive
Kingston 2x Kingston v300 120gb RAID 0 WD Blue ASUS 
CoolingOSMonitorPower
Cooler Master 212 Evo Windows 7 HP w2408h NZXT HALE82 V2 
CaseOther
Corsair 450D I have pretty lights.  
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post #4 of 4
Thread Starter 
Thanks for the replies. Runned another instance of Prime95 for 12 hours and again no issues. Will run Memtest86 this evening and then Aida64 to finish. In regards to Memtest86, is it possible to run all 13 tests in 1 run for all 4x4Gb I have? Since HCI memtest gave no errors Its just a double check so no need to have this done stick by stick for now
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