Topic on Glossary talk:Central Processing Unit (CPU)

This page shows the changes between two versions of a post by Mirh in the topic "AMD hidden shenanigans" on Glossary talk:Central Processing Unit (CPU). You can see other versions of this post at its history page.

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 * Possibly every architecture before Ryzen [https://www.overclock.net/forum/10-amd-cpus/1499562-undervolting-editing-p-states-piledriver-using-amd-mrstweaker-mini-guide.html could hit] the TDP ceiling before even reaching the maximum frequencies <small><strike>(unclear whether this couldn't just be specific to some motherboards and/or workload though)</strike></small>
-** this is probably just [https://www.tomshardware.com/reviews/fx-8150-zambezi-bulldozer-990fx,3043-8.html Turbo Core] (whatever its [https://www.guru3d.com/articles-pages/amd-fx-8320e-processor-review,3.html versioning]) being dynamically adjusted according to the current load. It can be fooled then, and some OEMs may actually be doing this from the firmware ([https://forum.ixbt.com/topic.cgi?id=9:68421 ''Turbo CPB''] and [https://fcenter.ru/online/hardarticles/motherboards/37219-Gigabyte_G1_Sniper_A88X_plata_Socket_FM2_igrovoj_serii_G1_Killer#05 ''Turbo Performance Boost Ratio''] being some likely names?). Or at least I can't explain why else the same CPU getting [https://overclockers.ru/lab/show/77524_3/obzor-i-testirovanie-processora-amd-athlon-x4-845-v-ispolnenii-socket-fm2-znakomstvo-i-njuansy-razgona downclocked] for clear [http://oc.jagatreview.com/2016/03/hands-on-review-overclocking-athlon-x4-845-carrizo-murah-tanpa-igp/4/ TDP reasons] would be reported elsewhere [https://www.reddit.com/r/Amd/comments/bcsppb/athlon_x4_845_sustained_allcore_turbo_and_is_it/ happily running] dozens of watts above the official limit.
+:* ok this is probably just [https://www.tomshardware.com/reviews/fx-8150-zambezi-bulldozer-990fx,3043-8.html Turbo Core] (whatever its [https://www.guru3d.com/articles-pages/amd-fx-8320e-processor-review,3.html versioning]) being dynamically adjusted according to the current load. It can be fooled then, and some OEMs may actually be doing this from the firmware ([https://forum.ixbt.com/topic.cgi?id=9:68421 ''Turbo CPB''] and [https://fcenter.ru/online/hardarticles/motherboards/37219-Gigabyte_G1_Sniper_A88X_plata_Socket_FM2_igrovoj_serii_G1_Killer#05 ''Turbo Performance Boost Ratio''] being some likely names?). Or at least I can't explain why else the same CPU getting [https://overclockers.ru/lab/show/77524_3/obzor-i-testirovanie-processora-amd-athlon-x4-845-v-ispolnenii-socket-fm2-znakomstvo-i-njuansy-razgona downclocked] for clear [http://oc.jagatreview.com/2016/03/hands-on-review-overclocking-athlon-x4-845-carrizo-murah-tanpa-igp/4/ TDP reasons] would be reported elsewhere [https://www.reddit.com/r/Amd/comments/bcsppb/athlon_x4_845_sustained_allcore_turbo_and_is_it/ happily running] dozens of watts above the official limit.
-* Steamroller CPUs [https://www.overclock.net/forum/10-amd-cpus/1588994-disabling-igpu-usage-induced-cpu-throttling-geapm-steamroller-apus.html are throttled] when their iGPU is in use <small>(which seems a pretty common scenario for every "low budget gamer", but of course you would have to first be CPU-limited to even hope for an improvement)</small>. [https://www.overclock.net/forum/10-amd-cpus/1460028-amd-kaveri-a10-7850k-overclock-guide-125.html Alternatively] if a modded BIOS isn't available, editing p-states and disabling [https://community.hwbot.org/topic/83268-the-official-asrock-fm2-a10-oc-competition-thread/page/2/#comment-258042 APM] should be enough.
+* Steamroller CPUs [https://www.tomshardware.com/reviews/amd-a10-7890k-gaming-performance-benchmark,4491-2.html are throttled] when their iGPU is in use <small>(which is not as bad as it sounds [https://www.overclock.net/forum/10-amd-cpus/1555615-amd-kaveri-refresh-a10-7870k-apu-arrives-9.html usually], even in games it should be hard to be CPU-limited without a dedicated graphics card after all, but it is not impossible)</small>. If a [https://www.overclock.net/forum/10-amd-cpus/1588994-disabling-igpu-usage-induced-cpu-throttling-geapm-steamroller-apus.html modded BIOS] isn't available, editing [https://www.overclock.net/forum/10-amd-cpus/1460028-amd-kaveri-a10-7850k-overclock-guide-125.html p-states] and disabling [https://community.hwbot.org/topic/83268-the-official-asrock-fm2-a10-oc-competition-thread/page/2/#comment-258042 APM] should be enough.
-* funnily enough, this [https://setiathome.berkeley.edu/forum_thread.php?id=73431 didn't seem] to happen at least on the oldest bobcat apus, and it was somewhat holding down GPU performance
+:* this is unlike [https://bjorn3d.com/2012/10/amd-virgo-platform-2nd-generation-apu/ Trinity] being able to sustain even turbo on both simultaneously (though with its [https://bjorn3d.com/2013/06/amd-richland-june-5-2013-1201am-edt-nda/ idiot balls]), Llano just barely knowing how to turbo [https://www.anandtech.com/show/4444/amd-llano-notebook-review-a-series-fusion-apu-a8-3500m/4 its CPU], Jaguar [https://www.tomshardware.com/reviews/kabini-a4-5000-review,3518-3.html somehow] regressing with just [https://web.archive.org/web/20140508165702/http://techreport.com:80/review/26377/a-first-look-at-amd-mullins-mobile-apu/ one CPU] out of stone age (Puma came back with the very interesting concept of [https://hwbot.org/news/10740_amds_beema_and_mullins_architecture_stapm_lower_power_nothing_for_enthusiasts_but_ivr_in_2015/ frequency sensitivity] though) and Bobcat being a ([https://setiathome.berkeley.edu/forum_thread.php?id=73431 very]) [https://www.nordichardware.se/nyheter/amd-updates-brazos-with-turbo-core-and-3d.html mixed bag].
 And I could swear I knew more, but time was hard on my memory.
 <small>p.s. Ryzen is so [https://www.gamersnexus.net/guides/3491-explaining-precision-boost-overdrive-benchmarks-auto-oc complex] and [https://www.techpowerup.com/review/1usmus-power-plan-for-amd-ryzen-new-developments/ wide] that you'd need a manual just to understand the stock situation.</small>