Mikes10 Â Â 10 #1 Posted January 3, 2018 The nature if the problem has not been revealed but, M$ and Linux coders are working on a fix. Â So when the updates are released ensure you get them installed! Â https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/ Share this post Link to post Share on other sites Share this content via...
Ghozer   112 #2 Posted January 3, 2018 It's to do with the way that hyper threading works, in it's prediction of what part of 'code' you might need to execute next, so it pre-fetches and processes bits ahead 'just incase' - but in this process, it doesn't go through any sort of security checks on the code to see if it's valid or indeed part of the program it's actually executing, due to the way it bypasses the kernel or something..  this is quite a simplified explanation, but it's quite a major bug, but will only affect a handful of home users, as it's generally only under heavy workloads, and only in certain circumstances (certain instruction execution sets etc) Share this post Link to post Share on other sites Share this content via...
gamezone07 Â Â 23 #3 Posted January 3, 2018 So not games then, phew, Â second hand intel processors will take a hit though. Share this post Link to post Share on other sites Share this content via...
altus   540 #4 Posted January 3, 2018 So not games then, phew, Too early to say - wait for benchmarks with a patched version of Windows. Share this post Link to post Share on other sites Share this content via...
Cyclone   10 #5 Posted January 4, 2018 The early benchmarks are showing 10 - 30% drop in performance as it the fix is to entirely swap out a block of kernel memory to a different virtual memory space, which is apparently very costly and will take place whenever kernel mode is accessed (which is really quite often). Share this post Link to post Share on other sites Share this content via...
Ghozer   112 #6 Posted January 4, 2018 And its not just Intel Chips, there are two similar though slightly different bugs, one only affects Ibtel, whike the other can also affect ARM and AMD also..  So some phones may also be at risk. Share this post Link to post Share on other sites Share this content via...
Cyclone   10 #7 Posted January 4, 2018 I saw a statement from AMD saying that it didn't affect them, but the national (none tech) news is reporting that it does... Share this post Link to post Share on other sites Share this content via...
altus   540 #8 Posted January 4, 2018 I saw a statement from AMD saying that it didn't affect them, but the national (none tech) news is reporting that it does... There are actually three vulnerabilities and the one reported yesterday, the one that can cause big slow downs, doesn't affect AMD processors.  The Register has a good summary of the vulnerabilities and what's affected. Share this post Link to post Share on other sites Share this content via...
Ghozer   112 #9 Posted January 4, 2018 There are actually three vulnerabilities and the one reported yesterday, the one that can cause big slow downs, doesn't affect AMD processors. The Register has a good summary of the vulnerabilities and what's affected.   3? What's the other?  Theres Meltdown, and Spectre... Meltdown seems to be Intel only, while Spectre is Intel, ARM and AMD... Share this post Link to post Share on other sites Share this content via...
altus   540 #10 Posted January 4, 2018 3? What's the other? Theres Meltdown, and Spectre... Meltdown seems to be Intel only, while Spectre is Intel, ARM and AMD...  Spectre covers two of the vulnerabilities. Share this post Link to post Share on other sites Share this content via...
Ghozer   112 #11 Posted January 4, 2018 (edited) Spectre covers two of the vulnerabilities.  Its also the hardest to fix.. best I have found so far about this....  http://uk.businessinsider.com/intel-chip-bug-meltdown-and-spectre-explained-2018-1?r=US&IR=T  It also seems that Spectre is the worst of them.. Edited January 4, 2018 by Ghozer Share this post Link to post Share on other sites Share this content via...
swarfendor437 Â Â 14 #12 Posted January 4, 2018 (edited) Hi Ghozer, Had a look at that link you posted and wondered when a James Bond link would arise, hence my sardonic posting on the matter here: Â http://zoringroup.com/forum/viewtopic.php?f=4&t=13616&p=59549#p59549 Â Edited January 4, 2018 by swarfendor43 Share this post Link to post Share on other sites Share this content via...