Overclock.net › Forums › AMD › AMD CPUs › Hardware failure on prime95?
New Posts  All Forums:Forum Nav:

Hardware failure on prime95?

post #1 of 6
Thread Starter 
So, I was testing my rig last night, and left prime running for around 16 hours. The last worker (which I assume corresponds with the last core) gave:

"FATAL ERROR: Rounding was 0.5, expected less than 0.4"
"Hardware failure detected, consult stress.txt file."

Every other core ran fine, and this one seemed to do just fine for around 6 hours. Now, every time I run it, I get the fatal error within 5-6 minutes. I can't seem to figure it out. I brought everything back down to stock and it's still giving me the error. Is one of my cores dead?
post #2 of 6
A rounding error does not mean your core is "dead", but it is saying that it is spitting out incorrect data, which will yield problems in your computing environment (application crashes, OS crashes, etc.).

Which Prime95 test are you running? There are 3 types, Small FFT for max CPU stress if you're worried about the CPU. If it's possible it's your ram you can try Blend.

Have you tried bumping up your CPU Volts? Ideally at all stock you should be able to survive a prime95 load, but if you have a slightly weak core, sometimes a little voltage nudge can bring it back into line.
Also make sure to check on your core temps, heat is a CPUs worst enemy, if your cooler is mis-seated or TIM not applied properly you might be getting more heat than you expect, especially under harsh prime95 loads.

HWMonitor and CoreTemp being the usual suspects.
Edited by ocpokey - 3/1/11 at 5:35pm
Bleeding Edge
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5.0Ghz 24/7 ASUS P8P67PRO AMD 5870x2 8GB GSkill Ripjaw X 1600 @ CL8 
Hard DriveOSMonitorKeyboard
ADATA S599 64GB SSD + 2x 1TB Spinpoint (Raid 0) Windows 7 64Bit Dell 23" Razer Lycosa 
PowerCase
Seasonic X650 HAF X 
  hide details  
Reply
Bleeding Edge
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5.0Ghz 24/7 ASUS P8P67PRO AMD 5870x2 8GB GSkill Ripjaw X 1600 @ CL8 
Hard DriveOSMonitorKeyboard
ADATA S599 64GB SSD + 2x 1TB Spinpoint (Raid 0) Windows 7 64Bit Dell 23" Razer Lycosa 
PowerCase
Seasonic X650 HAF X 
  hide details  
Reply
post #3 of 6
Thread Starter 
I figured it out smile.gif

When I put everything back to stock, voltage was obviously back there too. I forgot to put the OC'd voltage in, and left it at auto. The mobo wasn't increasing voltage high enough, so that probably explains it. I increased it from where it was, and threw in a little CPU/NB voltage for good measure, and now it's running perfectly. Temps are right where I expected (HWMonitor reporting ~50C "CPU," ~36C on cores). It seems I have solved my own mystery, except I don't know what caused the first problem. I'm just going to write it up to a fluke, since I have no problems otherwise.
post #4 of 6
Computers are finnicky beasts, there are many reports of rigs running Prime95 for 6-12 hours stable then crashing in 5 minutes on loading some game. Or even running Prime fine for 6 hours, than at hour 7 reporting errors.

I tend to use Prime as a good jumping off point for stability, but I don't make the final call until the rig has been through the real world ringer of games, apps, folding, what have you. Multiple attack angle I say!
Bleeding Edge
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5.0Ghz 24/7 ASUS P8P67PRO AMD 5870x2 8GB GSkill Ripjaw X 1600 @ CL8 
Hard DriveOSMonitorKeyboard
ADATA S599 64GB SSD + 2x 1TB Spinpoint (Raid 0) Windows 7 64Bit Dell 23" Razer Lycosa 
PowerCase
Seasonic X650 HAF X 
  hide details  
Reply
Bleeding Edge
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5.0Ghz 24/7 ASUS P8P67PRO AMD 5870x2 8GB GSkill Ripjaw X 1600 @ CL8 
Hard DriveOSMonitorKeyboard
ADATA S599 64GB SSD + 2x 1TB Spinpoint (Raid 0) Windows 7 64Bit Dell 23" Razer Lycosa 
PowerCase
Seasonic X650 HAF X 
  hide details  
Reply
post #5 of 6
Thread Starter 
Quote:
Originally Posted by ocpokey;12575787 
Computers are finnicky beasts, there are many reports of rigs running Prime95 for 6-12 hours stable then crashing in 5 minutes on loading some game. Or even running Prime fine for 6 hours, than at hour 7 reporting errors.

I tend to use Prime as a good jumping off point for stability, but I don't make the final call until the rig has been through the real world ringer of games, apps, folding, what have you. Multiple attack angle I say!

Exactly why I'm just going to write it off for now. Seems stable so far in everything I've done, but I haven't done any folding yet. Haven't tried crazy multitasking either. Had some trouble with video rendering unfortunately :/
post #6 of 6
Hi, I hope this post isn't too old.
I'm getting the same error on two of my cores in my Opti 1381. With the clock at 250 (3.125 GHz), starting mprime (running linux), I get the rounding errors within seconds. at 240 (3 GHz), nothing for as long as i've had patience to let it go. At first, I thought I needed to turn down the North and South bridges, get them back to stock, but that didn't do anything.

Reading another thread, seemed like it was solved by adjusting memory speeds, but I've turned down the multiplier, which still fails, and adjusted the timing a bit with the same result. I guess I don't really know how much to tweak things yet. Current settings are 99924 at 1.6V

When I installed the memory, I ran memtest for hours without issue.

I've got the machine set to auto for voltage, mostly because I don't really know where to start. I've read a couple things: start at stock, go as high as possible then bump until it works, or crank the opti to 1.45V, but what should I do about the rest?

I'm really hoping to get to 3.5 GHz, but unless I can get past this, I don't see it happening. Thanks for your help....
mainline
(15 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 1381 Gigabyte MA790FXT-UD5P Radion 4850hd Patriot Sector 5 
Hard DriveHard DriveOptical DriveCooling
WD-640AAS caviar black OCZ Agility 3 does it really matter? Scythe Orocchi 
OSMonitorPowerCase
Ubuntu 64bit Samsung 2233 X2 Seagate 850 W Silver Certified Logisys 
  hide details  
Reply
mainline
(15 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 1381 Gigabyte MA790FXT-UD5P Radion 4850hd Patriot Sector 5 
Hard DriveHard DriveOptical DriveCooling
WD-640AAS caviar black OCZ Agility 3 does it really matter? Scythe Orocchi 
OSMonitorPowerCase
Ubuntu 64bit Samsung 2233 X2 Seagate 850 W Silver Certified Logisys 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › Hardware failure on prime95?