-
Competitor rules
Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
Skylake CPUs can freeze running Prime95
- Thread starter HazardO
- Start date
funny because ive seen well known overclockers call it that. I wouldn't call them noobs
Even 8pack reccomends against using it. Linus tech tips also doesn't recommend using it and classes it as a power virus.
Here's a definition of a power virus
"A power virus is a computer program that executes specific machine code in order to reach the maximum CPU power dissipation"
Does that not sound like what prime95 does?
Id take their word, as well as my own experience over users on a forum any day.
edit-
to be fair i think were all talking about two different types of stable. There is stable and prime95 stable. I know which kinda stable i care about.
Last edited:
Have never overclocked before now / with skylake... yet this person ^^ describes exactly my own observations. Perhaps matters were difference before 14nm node. But at this node and none other to refer back on, that was indeed my experience.
Well ill bow out of this discussion as it appears a lot of users on this forum seem to know more. But from my experience with overclocking i could fail on Prime 95 after a few hours but never have a single crash, hang or any errors of any sort from other torture test or even gaming and just normal use. To me this is stable just not prime95 stable. So if you prefer to use Prime95 for stability go ahead but ill never recommend using it for testing for stability.
Hell how do you even know your graphics cards are 100% stable when overclocked? Pfft Furmark?
Hell how do you even know your graphics cards are 100% stable when overclocked? Pfft Furmark?
Been overclocking since this place opened back in 1999. Prime95 has and will always be the goto app to check stability. I went through a stage of not running prime, and lost data because of it.
Also there are plenty of graphic card stress tests.
I still think it's a useful tool, but its not the prime95 of old.
Recent versions put a far higher load on CPUs than it used to. This is largely down to the use of AVX extensions and the manner in which Intel manages voltage regulation when those are called. Haswell and Skylake can call on additional voltage in those circumstances both on stock and on certain overclocked configurations. Overvolting isn't difficult to imagine if users aren't aware of all this. As such its not all that surprising to see vendors steering users away from it.
That said, on Skylake at least, prime can be used to pick up instability far quicker than other stress tests. But Prime stability needs much more voltage than say Realbench. I could put the extra voltage on, and have the piece of mind that the system is rock solid stable in all scenarios. However, the trade off is that higher voltage will be hotter and degrade the chip faster.
On the other hand, if all the data I care about is my save games, then stuff prime!
People usually think this when they don't know how to use IBT properly, which is the fault of the developer for not providing instructions (same with Linx).
Used correctly IBT usually finds instability in < 10 mins, compared to up to 24 hours for Prime95. Unfortunately you can't just choose "Standard" and click start, you have to (manually) load up as much memory as possible and check that the load (in GFLOPs) is close to peak.
https://forums.overclockers.co.uk/s...ght=ibt+memory+username_joeyjojo#post20222900
I updated on the Z170 Deluxe - did you have an OC in place and if so did you find it now needed more voltage? With the exact same settings I found suddenly the 4.6ghz/1.35v crashing (previously fine for weeks but instant post upgrade). When checking on 'auto' it was sitting at over 1.4v which is a bit odd. I've since moved back to 4.5/1.35v which seems fine so far... Might do some tinkering this weekend and see if I can get the previous performance back on track - be nice to have my 4.6 running max load in the 60 range not 70's again.
Was under the impression that IBT does not work for skylake anymore. As could not get it working. Intel's new tool is XTU now (Xtreme Tuning Utility). Which is difficult to pickup genuine instability / failures with.
Last edited:
It's not been updated since 2012 so possibly not. Linx is better maintained (Oct 2015):
http://www.xtremesystems.org/forums/showthread.php?201670-LinX-A-simple-Linpack-interface/page37
Haven't tried XTU.
No issues here. Auto always set too high voltage on my system, even on the default included BIOS. I've been using adaptive 1.3v for 4.8Ghz from the get go, without any problems.
If OCUK ran the Prime95 project we'd have discovered that every number is a Prime number.
Thanks mate, i'll have a read on adaptive and give it a shot this weekend - defo seems like these run pretty cool at those lower voltages with my cooling so worth a go. If its possible to PM your settings to me please do so
