768k Skylake Problem/Bug - Page 39

chalsall · 2016-01-19, 13:17

Quote:

Originally Posted by pegnose

Is it a problem to cut the internet connection while Prime95 is doing the hard work?

You should let the client contact the server every few days, but other than that it's fine to not have an Internet connection. Note that the communications only consume a hundred bytes or so; nominally once a day.

pegnose · 2016-01-19, 14:16

Quote:

Originally Posted by chalsall

You should let the client contact the server every few days, but other than that it's fine to not have an Internet connection. Note that the communications only consume a hundred bytes or so; nominally once a day.

Ok, thx! The traffic is totally ok, I just tend to switch of my wifi router on going to work.

ralleh · 2016-01-19, 15:47

Nick Shih posted a 2.02 BIOS for the Z170 OC Formula today. The new BIOS contains the newer Microcode 74.

Too bad it's not told what's the difference between 6A and 74, as 6A already fixed the 768k problem.

pegnose · 2016-01-19, 16:02

Quote:

Originally Posted by ralleh

Nick Shih posted a 2.02 BIOS for the Z170 OC Formula today. The new BIOS contains the newer Microcode 74.

Too bad it's not told what's the difference between 6A and 74, as 6A already fixed the 768k problem.

Hopefully memory compatibility and power management issues. Many people out there are going bonkers because of randomly freezing machines (particularly idle state).

Uncwilly · 2016-01-19, 22:44

Can someone with MersenneWiki privileges please edit the stub on the bug?
http://mersennewiki.org/index.php/Skylake_Bug

Phil MjX · 2016-01-19, 23:40

I have received today a beta bios from MSI, I'll give it a try and keep you informed.
But before I'd like to do some benchmarks with prime95 to see if it has performance impact.

ixfd64 · 2016-01-20, 00:09

Probably a stupid question as I haven't had the time to read through the thread yet, but does the bug affect LL results, or does it simply cause computers to freeze? If it's the former case, should we prioritize double-checking on results returned by Skylake machines?

VBCurtis · 2016-01-20, 00:15

Quote:

Originally Posted by ixfd64

Probably a stupid question as I haven't had the time to read through the thread yet, but does the bug affect LL results, or does it simply cause computers to freeze? If it's the former case, should we prioritize double-checking on results returned by Skylake machines?

Yes, we should double-check all skylake results run at 768k FFT size. Luckily, I did that in the time it took me to write this sentence, so we're good.

Madpoo · 2016-01-20, 01:45

Quote:

Originally Posted by VBCurtis

Yes, we should double-check all skylake results run at 768k FFT size. Luckily, I did that in the time it took me to write this sentence, so we're good.

LOL...

The good (?) news is that even if it affects other FFT sizes (which seemed like a possibility, maybe remote), it seemed to trigger round-off errors.

Regardless, they'll be double-checked eventually.

pegnose · 2016-01-20, 08:19

Quote:

Originally Posted by ixfd64

Probably a stupid question as I haven't had the time to read through the thread yet, but does the bug affect LL results, or does it simply cause computers to freeze?

The (sadly) misleading thing in the news (web article headlines explicitly stating this) is that while it might lead to computers freezing (who knows; although there are so many Skylake problems out there with memory, power management etc. that actually! freeze PCs), I learned here (and by testing) that Prime95 (at least 27.x) will just drop workers.

Unfortunately, by now many people with Skylakes freezing believe that the 768k bug accounts for their problems. And the first already are disappointed learning that a bios update with the new micro code isn't helping their PCs.

I am also curious. I had solved memory issues for my machine until I finally could run memtest85 and Prime95 for whole days without a freeze and idle states wouldn't bother me as well (as opposed to other people). At that point I decided it would be worth to finally resync my software raid (which usually takes ~1d too).

And what can I say? MY PC FROZE!!! I am so p***ed off, excuse my french.

Ok, I had Prime95 running during that on all 8 cores, but that shouldn't be an issue for a 1.5k Euro machine. Seriously not.

henryzz · 2016-01-20, 10:04

Quote:

Originally Posted by Madpoo

LOL...

The good (?) news is that even if it affects other FFT sizes (which seemed like a possibility, maybe remote), it seemed to trigger round-off errors.

Regardless, they'll be double-checked eventually.

The majority of Skylake systems will probably be using v28 as well which means FMA avoiding this bug.

2016-01-19, 15:47	#421
ralleh Dec 2015 6₁₆ Posts	Nick Shih posted a 2.02 BIOS for the Z170 OC Formula today. The new BIOS contains the newer Microcode 74. Too bad it's not told what's the difference between 6A and 74, as 6A already fixed the 768k problem. Last fiddled with by ralleh on 2016-01-19 at 15:48

2016-01-20, 00:09	#425
ixfd64 Bemusing Prompter "Danny" Dec 2002 California 100101011110₂ Posts	Probably a stupid question as I haven't had the time to read through the thread yet, but does the bug affect LL results, or does it simply cause computers to freeze? If it's the former case, should we prioritize double-checking on results returned by Skylake machines? Last fiddled with by ixfd64 on 2016-01-20 at 00:09

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2016-01-19, 22:44	#423
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 2·7·19·37 Posts	Can someone with MersenneWiki privileges please edit the stub on the bug? http://mersennewiki.org/index.php/Skylake_Bug

2016-01-19, 23:40	#424
Phil MjX Sep 2004 5×37 Posts	I have received today a beta bios from MSI, I'll give it a try and keep you informed. But before I'd like to do some benchmarks with prime95 to see if it has performance impact.