Topic on Glossary talk:Overclocking
This page shows the changes between two versions of a post by Mirh in the topic "Wisdom infodump" on Glossary talk:Overclocking.
You can see other versions of this post at its history page.
| Line 16: | Line 16: | ||
* [https://www.notebookcheck.net/Intel-Extreme-Tuning-Utility-XTU-Undervolting-Guide.272120.0.html XTU] and [https://www.ultrabookreview.com/31385-the-throttlestop-guide/ ThrottleStop], end. | * [https://www.notebookcheck.net/Intel-Extreme-Tuning-Utility-XTU-Undervolting-Guide.272120.0.html XTU] and [https://www.ultrabookreview.com/31385-the-throttlestop-guide/ ThrottleStop], end. | ||
| − | * Well, not so fast. The Plundervolt attack made Intel recommend vendors to enable the "Overclocking Lock" flag in the bios (which, despite the name, at least on normal locked cpus just allowed for voltage control). It [https://old.reddit.com/r/XMG_gg/comments/h0wuoh/cpu_undervolting_in_bios_setup_for_xmg_and/ wasn't] a ''hard'' requirement.. but this was just the path of least resistance for most. It's not really difficult to unlock with the usual [[Glossary talk:BIOS|bios tools]], but still. | + | * Well, not so fast. The Plundervolt attack made Intel recommend vendors to enable the "Overclocking Lock" flag in the bios (which, despite the name, at least on normal locked cpus just allowed for voltage control). It [https://old.reddit.com/r/XMG_gg/comments/h0wuoh/cpu_undervolting_in_bios_setup_for_xmg_and/ wasn't] a ''hard'' requirement.. but this was just the path of least resistance for most. It's not really difficult to unlock with the usual [[Glossary talk:BIOS|bios tools]], but still. |
| + | :* actually there's *even more* [https://old.reddit.com/r/intel/comments/10slejm/intel_blocks_undervolting_the_whole_story/ mess] to this story since alder lake | ||
| + | :* and W11, having rolled out quite the [https://old.reddit.com/r/Windows11/comments/prhdgq/undervolting_accessing_0x150_msr_is_still_not/ number] of MSR tinkering obstacles (pre-boot [https://github.com/psyq321/PowerMonkey solutions] have arisen though) | ||
* [https://old.reddit.com/r/overclocking/comments/ls3yqo/help_with_understanding_bd_prochot/ BD PROCHOT] misbehaving or [https://superuser.com/questions/1465350/how-to-determine-processor-frequency-scale-down-to-200-mhz-due-to-thermstatus/#1669682 errata] can explain "cold temperature" throttling | * [https://old.reddit.com/r/overclocking/comments/ls3yqo/help_with_understanding_bd_prochot/ BD PROCHOT] misbehaving or [https://superuser.com/questions/1465350/how-to-determine-processor-frequency-scale-down-to-200-mhz-due-to-thermstatus/#1669682 errata] can explain "cold temperature" throttling | ||
* For Turbo Boost to consider a core inactive this has to be [https://web.archive.org/web/20120131091738fw_/https://download.intel.com/design/processor/applnots/320354.pdf at least] in C3 sleep, so (at least on non-K cpus [https://gearspace.com/board/music-computers/465221-c1e-c3-c6-eist-speedstep-turbo-boost-core-parking-3.html#post6298060 normally]?) the most extreme quests for minimum latency may end up hurting maximum few-threaded performance without some planning, core pinning and manual fine-tuning of individual per-CPU-registers. | * For Turbo Boost to consider a core inactive this has to be [https://web.archive.org/web/20120131091738fw_/https://download.intel.com/design/processor/applnots/320354.pdf at least] in C3 sleep, so (at least on non-K cpus [https://gearspace.com/board/music-computers/465221-c1e-c3-c6-eist-speedstep-turbo-boost-core-parking-3.html#post6298060 normally]?) the most extreme quests for minimum latency may end up hurting maximum few-threaded performance without some planning, core pinning and manual fine-tuning of individual per-CPU-registers. | ||