[SpongeJohn]

Originariamente inviato da ninja750

quindi secondo te intel e amd sono dei perditempo a implementare tutte ste menate sui risparmi energetici da anni come core parking adesso speedstep prima e tutte le altre sfumature nel mezzo?

Ma non è che Zen non abbia risparmia energetici, ha tutte le funzioni di cui parli.

Solo che la gestione di questi è così veloce che non viene rilevata correttamente dai software di monitoraggio, che quando va bene hanno un polling rate di 1 secondo (molti partono da 2 secondi). Mentre i core su Zen2 cambiano da sleep a boost massimo diverse volte per secondo, inseguendo il concetto di "race-to-sleep"

Originariamente inviato da Sintara

Fai come ti pare, amd è da ryzen 1000 che dice sempre la solita cosa, che ai risparmi energetici ci pensa la cpu stessa, infatti nel profilo amd Ryzen balanced il livello minimo del processore è impostato al 99%, ci sarà un motivo o quelli di amd non ci capiscono niente? Ma tanto è tempo sprecato visto che tra due ore ci sarà un altro che dice che amd ha il problema delle frequenze sparate a palla, peccato.

E tu linka questo:

https://community.amd.com/servlet/Ji...iled_Brief.pdf

Da notare che alcune delle correzioni agli ultimi driver le hanno fatte non perchè c'è un reale problema di frequenze/voltaggi, ma per "calmare" le polemiche di chi non aveva mai usato un ryzen prima. Devo dire però che non hanno risolto.

Segnalo in particolare pagina 3:

WHAT TO EXPECT FROM YOUR PROCESSOR

Users of 3rd Gen AMD Ryzen™ Processors should expect the following behaviors from their processor after this plan is in place:
1. If a processor core is actively running a low-demand workload, you will see the chip running at approximately 99% of base clock and core voltage up to 1.2V. A properly functioning monitoring tool should always show values clustered around here, unless...

2. If a processor core is truly running no workload, the processor core will be placed into the “Core C6” (CC6) power-gated sleep state. Presently, AMD Ryzen Master is the only tool that can show this CC6 state (Figure 3 below). This state may be opportunistically engaged hundreds of times per second. Voltages in this condition might be as low as 0.200V, and clockspeeds down to
0MHz/Sleep are also possible.

a. Sidenote: It is also possible for all cores to be in CC6. If this happens, the processor can selectively shut down uncore components and enter an even deeper state called Package C6 (PC6).

3. Unless a monitoring tool is capable of probing and reporting CC6 sleep state, the tool may simply report out the last voltage and clockspeed that was observed before the processor went to sleep. This may give the illusion that the CPU is “stuck,” which can be interesting if the CPU jumped from high boost to sleep.

a. Sidenote: Probing the deeper PC6 state wakes the processor and ruins the powersavings. A processor in PC6 will not update your tool(s) until cores are awake.

4. Boost voltages up to ~1.5V should be expected if the processor is truly under some sort of load. We understand that this is quite different from what you may have experienced with other processors, but it is normal behavior for an AMD Ryzen CPU.

5. Frequency boost can and will happen on the desktop. Voltage is required to support boost. OS background tasks, and tasks that appear trivial (e.g. websites heavy with Javascript), can be more demanding than you think. Even an idle desktop may have substantial background tasks.

6. If you measure power at the wall (e.g. Kill-A-Watt device), there should be a small difference between the Windows Balanced and updated AMD Ryzen Balanced power plans. When running the new AMD Ryzen Balanced plan you should expect power usage to be around ±5W versus the Windows Balanced plan. Meanwhile, the unique changes to our plan are better suited to
exploiting the performance capabilities of 3rd Gen Ryzen™.

7. We know some enthusiasts have been using the Balanced power plan that ships with Windows10 as a temporary workaround for the frequency/voltage behaviors described in this blog. This
workaround is no longer required.

8. As temperature is a function of voltage and frequency, desktop processor temperatures should incrementally decline with the new plan. This is because the processor will spend less time reaching for an unneeded boosted voltage and frequency target. But it goes without saying: any processor will see transient temperature spikes if boost was applied to handle some sort of
workload (a browser with tons of tabs, for example).

9. And on a myth-busting note: users should not try to set a maximum processor state of 99% in a custom power plan. This disables boost by locking the processor to the base clock.

Se serve traduco.