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Stress test i5 3750K - total newbie

post #1 of 9
Thread Starter 
Have had my new build up and running for a few days. Running well and seems stable. System specs are in signature. Very little in the way of programs loaded yet.

I'm totally new to stress testing so I've been doing a lot of reading about the subject. I might attempt to do a modest (4.0 - 4.2 Ghz) of my new 3570K (also a first for me) and understand that stress testing is critical to a successful OC. I have downloaded Prime95, Intel Burn Test and OCCT. From what I understand IBT might be the best 1st test for me to run as it is very easy to stop if there are any heat problems. I read in one guide that a IBT stress test should never exceed the TCase of the CPU which in the case of the 3570K is 67.4 C and should normally run about 20 (C) higher than idle temps. Is this correct? I will probably be using HWinfo64 to monitor heat. This guide also recommended running the Standard, High and Very High tests 20 times. Does this sound right or should I run any additional tests and if so for how many times?

Assuming I pass IBT tests I would probably run Prime95 as this seems to be a more system wide test program. Would appreciate any tips or guide recommendations on properly running Prime95.

I've had some initial concerns that one of my cores seems to be running about 8 - 12 degrees (depending on which monitoring program I'm using) warmer than the other 3 cores. Overall temps of the CPU seem fine, about 32 - 35 C with no load and ambient air around 75 F. From what I've found out this is not unusual but my only frame of reference is my Q6600 (Dell system) in which all 4 core temps were withing 2 - 3 degrees of each other. I have also seen some posts of 3570K core temps that were much closer together than mine. Below is a screenshot showing the core temps as tested today (click to enlarge).

My apologies if I've posted this in the incorrect forum but could not seem to find one dedicated to stress testing. TIA for any assistance.

post #2 of 9
Go into Control Panel, Programs, Uninstall a program, uninstall IntelBurnTest.

The only stress test you'll need is Prime95 v27.7. Set it to custom and put in all your available ram. Stress test for no less than 24 hours to find maximally stable overclock and monitor temperatures with AIDA64, Real Temp, or Core Temp. I have NEVER had an overclock fail me yet after passing 24+ hours on custom (blend) mode with 90%+ allocated available ram. NEVER.
post #3 of 9
Use IBT. It provides a quicker check of stability than Prime95, and it generates a lot of heat to stress your cooling. You can follow up with Prime95 if you want, but if your system isn't stable IBT will normally find it a lot quicker than waiting for Prime95 every time you change something.

As for temps, you want to keep them (as read by CoreTemp or RealTemp) in the 70s if you can, but low 80s is really no problem with Ivy. Don't worry about Tcase, as that is not a temperature you can see and is only used by the people that design coolers. You want the actual die temp (which CoreTempa nd RealTemp provide).
post #4 of 9
Thread Starter 
Quote:
Originally Posted by Bruennis View Post

Go into Control Panel, Programs, Uninstall a program, uninstall IntelBurnTest.

The only stress test you'll need is Prime95 v27.7. Set it to custom and put in all your available ram. Stress test for no less than 24 hours to find maximally stable overclock and monitor temperatures with AIDA64, Real Temp, or Core Temp. I have NEVER had an overclock fail me yet after passing 24+ hours on custom (blend) mode with 90%+ allocated available ram. NEVER.
I've downloaded but not installed any of the stress programs I mentioned. In regards to Prime95, the available RAM would be the what is shown in Windows Task Manager>Performance Tab, not the total installed RAM, correct? Also, forgive my ignorance on this but I optimized Win 7 settings for use on my SSD and one of the things I did was set my page file for 1 GB instead of the 8 or so normal when running on a HDD. Would that be an issue when running Prime95 with your recommendations?

As stated, absolutely new to this and so many things to consider. headscratch.gif

Windows Task Manager
post #5 of 9
Thread Starter 
Quote:
Originally Posted by Forceman View Post

Use IBT. It provides a quicker check of stability than Prime95, and it generates a lot of heat to stress your cooling. You can follow up with Prime95 if you want, but if your system isn't stable IBT will normally find it a lot quicker than waiting for Prime95 every time you change something.

As for temps, you want to keep them (as read by CoreTemp or RealTemp) in the 70s if you can, but low 80s is really no problem with Ivy. Don't worry about Tcase, as that is not a temperature you can see and is only used by the people that design coolers. You want the actual die temp (which CoreTempa nd RealTemp provide).
Ah, difference of opinion right away! In regards to monitoring temps should I watch the temperature on the one core which seems to be running 8 - 10 degrees warmer than the others and use that as the "safe" number? In other words stop or end the test if that temp climbs into the 80s?

Let me see if I understand this concept. Spend a lot of money on a new 3570K and then try to kill it. kookoo.gif

All kidding aside it is a bit scary for a total newbie to this process but I know I will have to figure it out if I want to ever do any OCing at all. First time I've had the itch to do it. Just don't want to screw up!
post #6 of 9
2 runs of hyper-pi 32m should expose any weaknesses..and doesn't heat up all crazy.
http://www.virgilioborges.com.br/hyperpi/hyper_pi_0.99b.zip
 
Thuban Powah!
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Thuban Powah!
(14 items)
 
 
CPUMotherboardGraphicsRAM
Xeon X5650 Asus P6X58D-E Sapphire HD 7950 G.Skill Trident-X 2600 CL10 
Hard DriveCoolingPowerCase
Samsung 840 pro Bong cooler / RASA waterblock Rosewill Capstone Gold 750 None 
MouseMouse PadAudio
cheap! Newegg box panel ibeats with onboard. 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T w/2 cores locked @ 4.2+ M4a89GTD-Pro XFX Radeon HD 5870 8gb Samsung ddr3 1600 11-11-11-28@ 8-8-8-24 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility2 40gb WD Blue 500GB Lite-On RASA waterblock 
OSMonitorKeyboardPower
Windows & Linux Samsung 1080p 2 ms Dell Thermaltake TR2-800 
CaseMouse
Cooler Master Elite 330 (was) cheap 
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post #7 of 9
A lot of times that temp difference shrinks under load (so it'll be 10C at idle, but only 3 or 4C at load). I'd watch the high one, but if just that one went to say 85C while the rest were 80C I would think that was acceptable. Hopefully, though, you'll stay down in the 70s.
post #8 of 9
Thread Starter 
Quote:
Originally Posted by Forceman View Post

A lot of times that temp difference shrinks under load (so it'll be 10C at idle, but only 3 or 4C at load). I'd watch the high one, but if just that one went to say 85C while the rest were 80C I would think that was acceptable. Hopefully, though, you'll stay down in the 70s.
Thanks for the info. Should I run all the tests available, like Standard, High, Very High, etc. and if so how many passes?
post #9 of 9
Quote:
Originally Posted by Hicountryrider View Post

Thanks for the info. Should I run all the tests available, like Standard, High, Very High, etc. and if so how many passes?

The higer settings use more memory, and so are more stressful, so I'd run at least Very High (can't remember all the options). 10 passes at very high is a good start - if it can pass that then I'd call it initially stable and move on to some other testing.
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