Hardware Discussion Thread

[Qaazavaca Qaanic]

I have a Lenovo Y40-80 laptop running Windows 7 x64 (downgraded).

Around a few months ago, it started randomly crashing when I pressed Print Screen. Sometimes, Firefox would crash and moments afterward the computer would hang.

EDIT: Whenever it freezes, the audio repeats the previous fraction-second forever, and the CPU heats up. I don't get any BSOD crash dumps accessible from BlueScreenView.

I can reproduce this problem by either pressing Print Screen, or running Firefox Profiler for a few minutes before pressing stop. It doesn't always crash, though (somewhat random).

Oddly enough, this problem even shows up in Safe Mode!

This issue emerged around the time I installed the Lenovo BIOS rootkit fix. I tried uninstalling Malwarebytes Anti-Exploit, which didn't help.

Also see: http://board.byuu.org/phpbb3/viewtopic.php?f=6&t=789

Reddit as usual is utterly useless: https://www.reddit.com/r/techsupport/comments/3sltr1/lenovo_y4080_laptop_crashes_on_print_screen_or/

[Garteal]

Just a heads-up to Skylake owners; there is a bug which causes Skylake builds to freeze during complex tasks. Intel has acknowledged this and is rolling out a fix for it.
Be on the look out for a new BIOS for your motherboard.

Source

[NaturalViolence]

Garteal Wrote:there is a bug which causes Skylake builds to freeze during complex tasks

*during a very very specific complex task

Fixed that for you. That article title is misleading.

If all complex workloads caused it to lock up it either would have never made it to market or it wouldn't have taken this long after launch to find the bug. Pretty much all uarch have some bugs in them but they are so difficult to find that most go unknown for months/years or are never discovered. Anything that doesn't require super rare/specific circumstances to produce an error gets found and patched during validation pretty quick before production even begins. Sometimes they are even left unpatched after discovery because they are considering too difficult to reproduce to matter.

In this particular instance you need to perform FFT with an exponent of 14,942,209 using HT and AVX1 without FMA3. Other large FFT exponents might cause it but that has been the only one found so far that has been reproducible.

[Anti-Ultimate]

Their BIOS update will disable overclocking for non K processors.

Calling it now.

[NaturalViolence]

Disable what kind of overclocking and in what way?

[Anti-Ultimate]

(01-14-2016, 03:54 AM)NaturalViolence Wrote: Disable what kind of overclocking and in what way?

You can overclock non K processors via BCLK changes. Intel doesn't officially allow it.

[NaturalViolence]

Anti-Ultimate Wrote:Intel doesn't officially allow it.

Source?

[DrHouse64]

Since several years you aren't supposed to be able to overclock non K intel processors.

[DacoTaco]

(01-14-2016, 08:56 AM)DrHouse64 Wrote: Since several years you aren't supposed to be able to overclock non K intel processors.

yet here i am... able to oc my locked cpu

not completely ofc, but its possible


so ye, i'd like to see the source on that as well

[lamedude]

http://lmgtfy.com/?q=skylake+bclk+overclocking