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 |
|
|---|---|---|
| 11 secs agoMSI H310M PRO-VDH (MS-7B29) | Tree trunk | 62% |
| 11 secs agoHP 870-108ns | Speed boat | 36% |
| 14 secs agoDell G3 3579 | Battle cruiser | 63% |
| 16 secs agoPavilion Power Laptop 15-cb0... | Destroyer | 29% |
| 20 secs agoDell OptiPlex 7050 | Gunboat | 73% |
| 28 secs agoAsus Z87-PLUS | Destroyer | 65% |
| 29 secs agoGA-X399 AORUS Gaming 7 | Battleship | 26% |
| 30 secs agoDell XPS 15 9575 | Aircraft carrier | 75% |
| 30 secs agoMSI B450-A PRO (MS-7B86) | UFO | 51% |
| 33 secs agoDell Inspiron 3543 | Sail boat | 84% |
| 38 secs agoDell OptiPlex 780 | Raft | 81% |
| 42 secs agoAsus ROG STRIX B350-F GAMING | Nuclear submarine | 63% |
| 56 secs agoGU515AA-AKB a6240.cs | Surfboard | 35% |
| 1 min agoGA-Z390 AORUS ELITE-CF | UFO | 64% |
| 1 min agoMPG X570 GAMING PLUS (MS-7C3... | Aircraft carrier | 61% |
| 1 min agoGigabyte GA-M61PME-S2P | Surfboard | 62% |
| 1 min agoB450M GAMING PLUS (MS-7B87) | Battleship | 61% |
| 1 min agoAsus PRIME B360M-A | Battleship | 56% |
| 1 min agoAsus PRIME B350M-E | Gunboat | 71% |
| 1 min agoB450M GAMING PLUS (MS-7B87) | Battleship | 53% |