TESTA Yes, mostly on shallow queue random 4k operations, by up to around 40 MBps
CPU power saving states allow idle cores to sleep (C1) or partially sleep (C2...). Activating a core from a sleeping or partially sleeping state takes enough time to impact SSD performance by up to 40 MBps. The changes in performance are most noticeable on shallow queue depth random 4K operations. Even headline sequential speeds can be impacted by up to around 20 MB/s. For most users, disabling power saving states in the BIOS is not worth the slightly higher power consumption and reduced peak CPU performance that results. Peak CPU performance is reduced on Intel chips because of the way turbo boost is implemented. In order to turbo boost an active core, inactive cores are put to sleep in order to keep overall temperature down.
CPU power saving states allow idle cores to sleep (C1) or partially sleep (C2...). Activating a core from a sleeping or partially sleeping state takes enough time to impact SSD performance by up to 40 MBps. The changes in performance are most noticeable on shallow queue depth random 4K operations. Even headline sequential speeds can be impacted by up to around 20 MB/s. For most users, disabling power saving states in the BIOS is not worth the slightly higher power consumption and reduced peak CPU performance that results. Peak CPU performance is reduced on Intel chips because of the way turbo boost is implemented. In order to turbo boost an active core, inactive cores are put to sleep in order to keep overall temperature down.
2019 Hardware Rankings
 PC Score |
PC Status |
|
|---|---|---|
| 1 sec agoPowerspec Gseries | Aircraft carrier | 51% |
| 6 secs agoGigabyte GA-990FXA-UD3 R5 | Destroyer | 54% |
| 10 secs agoB450 GAMING PLUS (MS-7B86) | Nuclear submarine | 65% |
| 11 secs agoGigabyte GA-M68MT-S2 | Sail boat | 38% |
| 13 secs agoDell Precision 5510 | Surfboard | 9% |
| 15 secs agoSpectre x360 Convertible 13-... | Yacht | 53% |
| 15 secs agoGA-X570 AORUS PRO WIFI | UFO | 66% |
| 19 secs agoROG CROSSHAIR VII HERO (WI-F... | UFO | 58% |
| 19 secs agoAsus PRIME X470-PRO | Nuclear submarine | 51% |
| 21 secs agoROG RAMPAGE VI EXTREME OMEGA | Tree trunk | 50% |
| 24 secs agoLG 15Z980-R.AAS9U1 | Yacht | 57% |
| 26 secs agoAcer Predator PH315-51 | Battleship | 57% |
| 27 secs agoHP EliteBook 8760w | Yacht | 59% |
| 30 secs agoAsus TUF B350M-PLUS GAMING | Battleship | 41% |
| 31 secs agoAsus Z170 PRO GAMING | Battle cruiser | 39% |
| 38 secs agoMSI Z97-G45 GAMING (MS-7821) | Battleship | 59% |
| 40 secs agoSpectre x360 Convertible 13-... | Nuclear submarine | 56% |
| 40 secs agoAsrock Z170A-X1/3.1 | Battle cruiser | 63% |
| 41 secs agoAsus G752VS | Aircraft carrier | 61% |
| 45 secs agoAcer Aspire A715-72G | Yacht | 43% |