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.
2018 Hardware Rankings
 PC Score |
PC Status |
|
|---|---|---|
| 13 secs agoAlienware Aurora R7 | UFO | 48% |
| 14 secs agoLenovo 4236WHW | Raft | 32% |
| 20 secs agoSABERTOOTH Z97 MARK 2/USB 3.... | UFO | 96% |
| 31 secs agoAsus ROG STRIX X299-E GAMING | UFO | 66% |
| 36 secs agoAsus PRIME B350M-K | Tree trunk | 47% |
| 49 secs agoLenovo 20152 | Raft | 14% |
| 51 secs agoAcer Aspire A515-51G | Gunboat | 36% |
| 1 min agoLenovo 2354A14 | Jet ski | 54% |
| 1 min agoLenovo 20236 | Tree trunk | 84% |
| 1 min agoLenovo HuronRiver Platform | Raft | 58% |
| 1 min agoAsus UX32VD | Sail boat | 25% |
| 1 min agoGigabyte GA-B85-HD3 | Battleship | 54% |
| 1 min agoDell Latitude E5440 | Jet ski | 84% |
| 1 min agoAsus PRIME B350-PLUS | Yacht | 12% |
| 2 mins agoGigabyte H370M D3H | UFO | 52% |
| 2 mins agoToshiba QOSMIO X870 | Yacht | 70% |
| 2 mins agoAsus PRIME H310M-D | Yacht | 48% |
| 2 mins agoAsus PRIME Z370-A | Battleship | 58% |
| 2 mins agoGigabyte Z370P D3 | Battleship | 62% |
| 2 mins agoAsrock N68C-GS4 FX | Raft | 27% |