Overclock.net › Forums › Intel › Intel CPUs › 12+hour prime. Is it really necessary?
New Posts  All Forums:Forum Nav:

12+hour prime. Is it really necessary? - Page 2

post #11 of 63
jezz there is a thing as over stress testing no more then 12hrs because i beleave that it cant be good for the CPU to max it out for long periods of time think of driving ur car as fast as u can for a long time its not the best thing to do. now a few hours of prime95 should be enough
post #12 of 63
delete
Edited by Riou - 8/19/11 at 3:44am
post #13 of 63
Quote:
Originally Posted by kieran13 View Post
jezz there is a thing as over stress testing no more then 12hrs because i beleave that it cant be good for the CPU to max it out for long periods of time think of driving ur car as fast as u can for a long time its not the best thing to do. now a few hours of prime95 should be enough
It depends upon on how you use your computer. Some of us run tasks that can take days to finish. Some of us here run distributed computing projects like Folding@Home or BOINC for weeks and months.

You can never be 100 percent certain a computer is stable. However it is good practice to identify and instabilities early on before it becomes a lingering problem.

Car companies like BMW, Porsche and Toyota redline their engines for hours to test the stability before they ship them out for cars.
post #14 of 63
I think the best initial advice is to get over the idea of 100% stability and just take it to the level you NEED. Some people really obsess over it and no amount of stress testing is completely thorough.

Now obviously with the question posed for this thread you are not worried about 100% stability. Is it necessary I don't really know for sure, but if you can do it I think its a reasonably good idea. My friend does it for 6-8 hours and that's worked for him. I would say if you can afford the risk involved with a possible BSOD then do 6 hours of blend and just see it out from there. If you crash after that during normal use, bump voltage 0.01 and you should be fine there on out.

I like Prime, I feel like it does a good job finding instability quickly like the blend test or the 1344K & 1792K FFTs. I personally run Prime for 12h because that's what I've been doing for the Sandy Stable club.... it might be overkill but running it overnight is not really that hard.
    
CPUMotherboardGraphicsRAM
i5-2500K [24/7: 4.9ghz 1.47v] ASRock P67 Extreme 4 (B3) EVGA Geforce 570 [890/2200 1.1v] G.Skill Ripjaws 2x4GB 1600Mhz 
Hard DriveMonitorPowerCase
WD Caviar Black 1TB HP f2105 1680x1050 Corsair TX750 V2 (backup Antec BP550W) Antec 902 
Mouse
Logitech G500 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5-2500K [24/7: 4.9ghz 1.47v] ASRock P67 Extreme 4 (B3) EVGA Geforce 570 [890/2200 1.1v] G.Skill Ripjaws 2x4GB 1600Mhz 
Hard DriveMonitorPowerCase
WD Caviar Black 1TB HP f2105 1680x1050 Corsair TX750 V2 (backup Antec BP550W) Antec 902 
Mouse
Logitech G500 
  hide details  
Reply
post #15 of 63
It really just depends on what you will be doing with your computer. Just surfing the web, playing the occasional game, and encoding the occasional video? 12 hrs or less is fine. Folding or doing other comparatively long, demanding tasks on your CPU? At LEAST 12 hrs.
    
CPUMotherboardGraphicsRAM
i7 920 D0 @ 4.0 1.2v Rampage II Extreme 7970 12gb 1600mhz @ 7-7-7-21 
Hard DriveOptical DriveCoolingOS
Corsair 128gb SSD 2xSeagate 7200.12 RAID 0 2x... BD-RW Prolimatech Megahalems Windows 7 Ultimate 
MonitorKeyboardPowerCase
1920x1080 48" Samsung TV ione Scorpius M10 Enermax Evo 1250w Custom 
Mouse
Logitech G9 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 920 D0 @ 4.0 1.2v Rampage II Extreme 7970 12gb 1600mhz @ 7-7-7-21 
Hard DriveOptical DriveCoolingOS
Corsair 128gb SSD 2xSeagate 7200.12 RAID 0 2x... BD-RW Prolimatech Megahalems Windows 7 Ultimate 
MonitorKeyboardPowerCase
1920x1080 48" Samsung TV ione Scorpius M10 Enermax Evo 1250w Custom 
Mouse
Logitech G9 
  hide details  
Reply
post #16 of 63
I tend to agree with the minimum 12-hour limit. The idea is that while this stress test is normally physically unrealistic, doing it over a sufficient period of time will expose issues with a system that are generally transient in nature and would not normally appear systematically. The mere fact that such instabilities become exposed is the clue that something must be done to render the computer more stable, or if left unstable, the user is aware of the potential for crashes/lockups/etc.

For a gaming computer? Perhaps 100% stability isn't truly mission-critical. But suppose you're folding and the work unit calculation's wrong because of a transient. If it's not cross-checked, your computer just submitted an incorrect protein shape to the folding server.

Another example is my number-crunching machine - it's not overclocked at all, and everything in the system is run at stock, because the system has to make reliable calculations so I can trust the results I'm getting.

In those kinds of cases true stability means the difference between confidence in your computer, and lack of it resulting in writing off a lot of work.
4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Corsair Hydro H60 Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Corsair Hydro H60 Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
post #17 of 63
12 hours of prime95 isn't even sufficient considering how crappy of a stress test prime is. Use linpack (OCCT linpack, IBT, LinX) and memtest86 if you want true stability instead of just a crappy overclock you can put in your sig.
    
CPUMotherboardGraphicsRAM
i5-760 @ 3.91 1.4v/1.3v BIOSTAR T5 XE CFX-SLI GTX 460 SLi 850/1900 1.1v 8gb DDR3 @ 1860 
OSMonitorCase
Windows 7 Pro 1920x1080 HAF 912 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5-760 @ 3.91 1.4v/1.3v BIOSTAR T5 XE CFX-SLI GTX 460 SLi 850/1900 1.1v 8gb DDR3 @ 1860 
OSMonitorCase
Windows 7 Pro 1920x1080 HAF 912 
  hide details  
Reply
post #18 of 63
Necessary? Is it necessary for me to drink my own urine? No! But I do it anyway, cause it's sterile and I like the taste.
Dead Ryzen
(12 items)
 
Penguin Box
(9 items)
 
 
CPUMotherboardGraphicsRAM
AMD RYZEN 7 1800X  MSI B350M MORTAR ARCTIC AMD Radeon Vega Frontier Edition G.SKILL TridentZ Series 32GB DDR4 3200 (2 x 16G... 
Hard DriveHard DriveCoolingMonitor
SAMSUNG SSD 950 PRO 512GB Crucial MX300 2TB Noctua NH-U12S  BenQ XL2730Z - 27” 2560x1440 
KeyboardPowerCaseMouse
Das Keyboard 4 Professional Soft Tactile (MX Br... Seasonic X-850(SS-850KM3 Active PFC F3) Fractal Design Define Mini C BenQ ZOWIE EC1-A 
CPUMotherboardGraphicsRAM
Intel Core i7-2600K @4.6 GHz P8Z68-V AMD Radeon RX 480 (ref. design) Mushkin Enhanced Stealth 8GB (2 x 4GB) (PC3 17000) 
Hard DriveCoolingOSPower
SanDisk Extreme PRO 480GB Noctua NH-U12 S Arch Linux Seasonic SS-520FL 520W 
Case
Corsair Vengeance Series C70 
  hide details  
Reply
Dead Ryzen
(12 items)
 
Penguin Box
(9 items)
 
 
CPUMotherboardGraphicsRAM
AMD RYZEN 7 1800X  MSI B350M MORTAR ARCTIC AMD Radeon Vega Frontier Edition G.SKILL TridentZ Series 32GB DDR4 3200 (2 x 16G... 
Hard DriveHard DriveCoolingMonitor
SAMSUNG SSD 950 PRO 512GB Crucial MX300 2TB Noctua NH-U12S  BenQ XL2730Z - 27” 2560x1440 
KeyboardPowerCaseMouse
Das Keyboard 4 Professional Soft Tactile (MX Br... Seasonic X-850(SS-850KM3 Active PFC F3) Fractal Design Define Mini C BenQ ZOWIE EC1-A 
CPUMotherboardGraphicsRAM
Intel Core i7-2600K @4.6 GHz P8Z68-V AMD Radeon RX 480 (ref. design) Mushkin Enhanced Stealth 8GB (2 x 4GB) (PC3 17000) 
Hard DriveCoolingOSPower
SanDisk Extreme PRO 480GB Noctua NH-U12 S Arch Linux Seasonic SS-520FL 520W 
Case
Corsair Vengeance Series C70 
  hide details  
Reply
post #19 of 63
Quote:
Originally Posted by MinitroN View Post
12 hours of prime95 isn't even sufficient considering how crappy of a stress test prime is. Use linpack (OCCT linpack, IBT, LinX) and memtest86 if you want true stability instead of just a crappy overclock you can put in your sig.
Explain the computers that are 200 pass IBT stable but BSOD within 10 minutes of prime95.
post #20 of 63
Quote:
Originally Posted by Riou View Post
Explain the computers that are 200 pass IBT stable but BSOD within 10 minutes of prime95.
They didn't do memtest86 or were doing it wrong.

Could you please provide one case where this happened. I'm sure you can search these forums if they existed.

In any case, there are many cases of 12+ hours or prime95 that are unstable in linpack within 20 minutes. Refer to my previous link.
    
CPUMotherboardGraphicsRAM
i5-760 @ 3.91 1.4v/1.3v BIOSTAR T5 XE CFX-SLI GTX 460 SLi 850/1900 1.1v 8gb DDR3 @ 1860 
OSMonitorCase
Windows 7 Pro 1920x1080 HAF 912 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5-760 @ 3.91 1.4v/1.3v BIOSTAR T5 XE CFX-SLI GTX 460 SLi 850/1900 1.1v 8gb DDR3 @ 1860 
OSMonitorCase
Windows 7 Pro 1920x1080 HAF 912 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › 12+hour prime. Is it really necessary?