Azrael5
31-07-2010, 10:48
Salve a tutti, scrivo perchè sare interessato a comprendere le dinamiche che coinvolgono gli elementi in oggetto del thread.
Questo interesse è originato sia per curiosità sia per un problema riscontrato con l'attivazione dello speedstep da bios e la corrispondente attivazione in xp:
attualmente ho attivati:
c1e enhanced
speedstep
tm control monitor
acpi 2.0.
Da quel poco che ho comnpreso leggendo i divresi articoli online riguardanti l'ACPI e le sue funzioni ho compreso che questo software sovrintende la gestione energetica dei vari dispositivi.
QUalcuno potrebbe fornire dei ragguagli in merito?
io ho letto questo articolo in cui si menziona come fattore determinante per l'attivazione o disattivazione delle funzioni C1E e SPEEDSTEP l'LLC.
A cosa servirebbe esattamente? E come determinarne l'attivazione o meno?
Grazie
Questo è il post da cui ho appreso maggiormente i fattori coinvolti nella questione:
Some people think their OC will be more stable if they disable C1E and SpeedStep. It will, but that's usually because they don't understand what these features do and how to compensate for it (it's not hard).
Both of them do similar things but under slightly different circumstances. C1E lowers the core voltage and multiplier when the CPU is halted, while SpeedStep (EIST) lowers the core voltage and multiplier when the CPU load drops below a certain level, or can turn control over to the operating system to put this function entirely under OS or even user control. The voltage change is in single steps (see the VID table in your processor datasheet) until the processor reaches the desired voltage.
Now the problem is, the motherboard is still deciding how much voltage to feed your CPU! If you've overclocked, and overvolted to compensate, then the mobo has to figure out whether the CPU should still be overvolted or not, and how much voltage to feed it at each of those steps. This results in two issues. The first issue is: Not enough voltage during one of these transitions and you have a CPU that doesn't have enough voltage and crashes. The second issue is: If you're using Loadline Calibration/Vdroop control, then the mobo won't drop the voltage at all, completely eliminating any potential power savings.
So C1E and SpeedStep are safe to use in certain overclocks, when LLC is off and you aren't running near your voltage limits. Due to the reduction in voltage when the CPU goes idle, CPU Vcore may need to be set a notch higher than otherwise to ensure that it still gets enough voltage at the lower frequency. If you have LLC on, then using C1E/SpeedStep buys you absolutely nothing and may as well be left disabled.
ps: abilitando C1E parrebbe attivarsi thermal monitor 1, con lo speedstep è altresì attivo thermal monitor 2.
Questo interesse è originato sia per curiosità sia per un problema riscontrato con l'attivazione dello speedstep da bios e la corrispondente attivazione in xp:
attualmente ho attivati:
c1e enhanced
speedstep
tm control monitor
acpi 2.0.
Da quel poco che ho comnpreso leggendo i divresi articoli online riguardanti l'ACPI e le sue funzioni ho compreso che questo software sovrintende la gestione energetica dei vari dispositivi.
QUalcuno potrebbe fornire dei ragguagli in merito?
io ho letto questo articolo in cui si menziona come fattore determinante per l'attivazione o disattivazione delle funzioni C1E e SPEEDSTEP l'LLC.
A cosa servirebbe esattamente? E come determinarne l'attivazione o meno?
Grazie
Questo è il post da cui ho appreso maggiormente i fattori coinvolti nella questione:
Some people think their OC will be more stable if they disable C1E and SpeedStep. It will, but that's usually because they don't understand what these features do and how to compensate for it (it's not hard).
Both of them do similar things but under slightly different circumstances. C1E lowers the core voltage and multiplier when the CPU is halted, while SpeedStep (EIST) lowers the core voltage and multiplier when the CPU load drops below a certain level, or can turn control over to the operating system to put this function entirely under OS or even user control. The voltage change is in single steps (see the VID table in your processor datasheet) until the processor reaches the desired voltage.
Now the problem is, the motherboard is still deciding how much voltage to feed your CPU! If you've overclocked, and overvolted to compensate, then the mobo has to figure out whether the CPU should still be overvolted or not, and how much voltage to feed it at each of those steps. This results in two issues. The first issue is: Not enough voltage during one of these transitions and you have a CPU that doesn't have enough voltage and crashes. The second issue is: If you're using Loadline Calibration/Vdroop control, then the mobo won't drop the voltage at all, completely eliminating any potential power savings.
So C1E and SpeedStep are safe to use in certain overclocks, when LLC is off and you aren't running near your voltage limits. Due to the reduction in voltage when the CPU goes idle, CPU Vcore may need to be set a notch higher than otherwise to ensure that it still gets enough voltage at the lower frequency. If you have LLC on, then using C1E/SpeedStep buys you absolutely nothing and may as well be left disabled.
ps: abilitando C1E parrebbe attivarsi thermal monitor 1, con lo speedstep è altresì attivo thermal monitor 2.