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 |
|
|---|---|---|
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| 20 secs agoHP ZBook 15 | Battle cruiser | 80% |
| 23 secs agoMSI X99S SLI PLUS (MS-7885) | UFO | 76% |
| 27 secs agoGigabyte GA-AX370-Gaming K7 | UFO | 46% |
| 31 secs agoMicrosoft Surface Book 2 | Aircraft carrier | 59% |
| 31 secs agoZ170A GAMING M7 (MS-7976) | UFO | 52% |
| 32 secs agoDell Precision M4400 | Surfboard | 33% |
| 32 secs agoAsus Strix 15 GL503GE | Nuclear submarine | 52% |
| 35 secs agoAsus P6X58D-E | Yacht | 39% |
| 37 secs agoAsrock Z370 Gaming-ITX/ac | UFO | 87% |
| 41 secs agoLenovo 20382 | Surfboard | 60% |
| 42 secs agoGigabyte GA-H67MA-USB3-B3 | Gunboat | 55% |
| 42 secs agoA320M PRO-VH PLUS (MS-7B07) | Yacht | 81% |
| 44 secs agoB450 GAMING PLUS (MS-7B86) | Battleship | 77% |
| 45 secs agoAsus PRIME B350M-A | Gunboat | 73% |
| 56 secs agoGigabyte Z390 AORUS MASTER | UFO | 66% |
| 59 secs agoAsus Z10PE-D16 WS | Battleship | 42% |
| 1 min agoToshiba Satellite L55-C | Sail boat | 63% |
| 1 min agoAsus Z270-WS | Battleship | 72% |