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 |
|
|---|---|---|
| 3 secs agoMSI B85M-E45 (MS-7817) | Tree trunk | 1% |
| 15 secs agoAsus P8H67 | Yacht | 59% |
| 37 secs agoMSI MS-16J5 | Battle cruiser | 68% |
| 38 secs agoToshiba dynabook B25/33BB | Raft | 68% |
| 56 secs agoTUF Gaming FX505GE_FX505GE | Gunboat | 63% |
| 57 secs agoDell Latitude E6330 | Sail boat | 74% |
| 58 secs agoAsus H81M-D PLUS | Gunboat | 71% |
| 1 min agoAsrock B450 Pro4 | Battle cruiser | 27% |
| 1 min agoAsrock AB350 Pro4 | Yacht | 27% |
| 1 min agoECS H61H2-M2 | Jet ski | 73% |
| 1 min agoROG MAXIMUS XI HERO (WI-FI) | UFO | 59% |
| 1 min agoSATELLITE PRO NB10-A-12Q | Surfboard | 41% |
| 1 min agoHP ProBook 470 G5 | Gunboat | 47% |
| 1 min agoECS G41T-M7 | Raft | 51% |
| 1 min agoHP EliteBook 8740w | Raft | 28% |
| 1 min agoAsrock Z77 Pro4 | Yacht | 24% |
| 1 min agoAsus K53SV | Jet ski | 35% |
| 1 min agoAsus ROG STRIX Z370-E GAMING | Nuclear submarine | 46% |
| 1 min agoAsrock Z87 Extreme3 | Battleship | 68% |
| 1 min agoHP h8-1360t | Gunboat | 34% |