Testing stability for 8 hours

[Jirachi]

Im planning to test stability for 8 hours with Aida64 with Stress CPU, Stress FPU, Stress Cache and Stress System Memory left on, as default. Is that a good way to test stability?

I have CPU Ratio Mode on Fixed mode and Voltage mode on override mode. When I check CPU-Z I see 1.2V and it stays there. Is that number always updating or is it just the number I set? I am worried that if I run this stability test for 8 hours the Vcore gets peaks like 1.37V or something.. I want it to stay at 1.2V.

 

[buildzoid]

cpu-z updates constantly however cpu-z(and almost all software) can be wrong by upto 200mv so you don't want to use it for voltage measurement. If you want accurate voltage reads you need to use a multi meter on the output caps around the cpu socket. However if you use a low llc setting cpu-z will be within 20mv of the actual voltage

 

[Jirachi]

Thanks a lot. I really still have a question: what is LLC, where to set and check it and what is the right LLC setting for it?

 

[buildzoid]

LLC stands for load line calibration and exists as a counter to voltage droop. It's found in the bios and for Asus motherboards under the digi+ menu. Without llc cpu core voltage can drop by upto 50mv. With too high llc you can get an unwanted voltage boosts by upto 100mv. Usually the optimum setting is the one labeled medium.
Oh crap I just realized haswell doesn't have any of these settings and is supposed to give perfect voltage setting. Soiif you set 1.2v in the bios you will always have 1.2v. Sorry for making you read an essay.

 

[Jirachi]

Thanks for the imformation and i really appreciate your help, thanks a ton for that. Are you sure haswell does t make use of this? Can I get some confirmation from others as well. Thanks .

 

[xorbe]

Im planning to test stability for 8 hours with Aida64 with Stress CPU, Stress FPU, Stress Cache and Stress System Memory left on, as default. Is that a good way to test stability?

That's a great start, but my last build was stable under load for hours on end, but would hang sitting idle. Something about idle to load current swing, and LLC, and vrm frequency ... my chip runs up to 5.1 under load but I can't cure the idle hang after 4.6 ... just FYI that overclocking can get tricky!

 

[steponz]

That's a great start, but my last build was stable under load for hours on end, but would hang sitting idle. Something about idle to load current swing, and LLC, and vrm frequency ... my chip runs up to 5.1 under load but I can't cure the idle hang after 4.6 ... just FYI that overclocking can get tricky!

Have you checked to make sure memory is stable.. that could cause your lockup on idle.


What chip and board are We talking about? Most asus boards have LLC even with Haswell .

Medium is usually good on air. But you should always test with a multi meter And under load.