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 |
|
|---|---|---|
| 2 secs agoGigabyte GA-H170-Gaming 3 | Battleship | 49% |
| 17 secs agoAsrock 990FX Killer | Yacht | 38% |
| 17 secs agoGigabyte GA-Z270P-D3-CF | Gunboat | 45% |
| 18 secs agoAcer Aspire V3-371 | Sail boat | 70% |
| 29 secs agoMSI Z170A PC MATE (MS-7971) | Gunboat | 24% |
| 33 secs agoAsrock Z390 Phantom Gaming 4 | Aircraft carrier | 63% |
| 40 secs agoLenovo 80XG | Jet ski | 42% |
| 43 secs agoAsus CROSSHAIR VI HERO | UFO | 45% |
| 49 secs agoAlienware Aurora R7 | Aircraft carrier | 64% |
| 49 secs agoGigabyte B450 AORUS M | Battleship | 67% |
| 50 secs agoAcer Spin SP513-52N | Yacht | 64% |
| 54 secs agoAsus ROG STRIX Z390-E GAMING | UFO | 74% |
| 56 secs agoGigabyte GA-B75M-D3H | Gunboat | 53% |
| 1 min agoGigabyte GA-MA770-UD3 | Surfboard | 11% |
| 1 min agoGigabyte Z370 HD3 | Aircraft carrier | 52% |
| 1 min agoMSI B150 PC MATE (MS-7971) | Battle cruiser | 58% |
| 1 min agoLenovo 80XL | Sail boat | 52% |
| 1 min agoAsrock AB350 Pro4 | UFO | 67% |
| 1 min agoGigabyte Z390 AORUS MASTER | UFO | 88% |
| 1 min agoAsus PRIME A320M-K | Battleship | 73% |