Podcast #456 - Radeon Vega FE, Intel SSD 545S, GTX USB, Mining Specifc Cards, and more!

Subject: General Tech | June 29, 2017 - 11:06 AM |
Tagged: video, Vega FE, thermalright, Spirit 140, Samsung, radeon, prorender, podcast, mining, mini ITX, microcode, logitech, GTX USB, gigabyte, galaxy s8+, G433, amd, AM4

PC Perspective Podcast #456 - 06/28/17

Join us for talk about Radeon Vega FE, Intel SSD 545S, GTX USB, Mining Specifc Cards, and more!

You can subscribe to us through iTunes and you can still access it directly through the RSS page HERE.

The URL for the podcast is: http://pcper.com/podcast - Share with your friends!

Hosts: Ryan Shrout, Jeremy Hellstrom, Josh Walrath, Allyn Malventano

Peanut Gallery: Alex Lustenberg, Ken Addison

Program length: 1:28:14
 
Podcast topics of discussion:
  1. Week in Review:
  2. News items of interest:
  3. Hardware/Software Picks of the Week
  4. Closing/outro

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Source:

Microcode Bug Affects Intel Skylake and Kaby Lake CPUs

Subject: Processors | June 26, 2017 - 08:53 AM |
Tagged: xeon, Skylake, processor, pentium, microcode, kaby lake, Intel, errata, cpu, Core, 7th generation, 6th generation

A microcode bug affecting Intel Skylake and Kaby Lake processors with Hyper-Threading has been discovered by Debian developers (who describe it as "broken hyper-threading"), a month after this issue was detailed by Intel in errata updates back in May. The bug can cause the system to behave 'unpredictably' in certain situations.

Intel CPUs.jpg

"Under complex micro-architectural conditions, short loops of less than 64 instructions that use AH, BH, CH or DH registers as well as their corresponding wider register (eg RAX, EAX or AX for AH) may cause unpredictable system behaviour. This can only happen when both logical processors on the same physical processor are active."

Until motherboard vendors begin to address the bug with BIOS updates the only way to prevent the possibility of this microcode error is to disable HyperThreading. From the report at The Register (source):

"The Debian advisory says affected users need to disable hyper-threading 'immediately' in their BIOS or UEFI settings, because the processors can 'dangerously misbehave when hyper-threading is enabled.' Symptoms can include 'application and system misbehaviour, data corruption, and data loss'."

The affected models are 6th and 7th-gen Intel processors with HyperThreading, which include Core CPUs as well as some Pentiums, and Xeon v5 and v6 processors.

Source: The Register