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 |
|
|---|---|---|
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| 3 secs agoLenovo 0301GVG | Sail boat | 40% |
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| 21 secs agoAsus MAXIMUS VI FORMULA | Aircraft carrier | 59% |
| 22 secs agoAsrock H61M-DGS | Tree trunk | 67% |
| 23 secs agoAsus H81M-K | Destroyer | 60% |
| 28 secs agoGigabyte GA-AERO 15WV8 | Nuclear submarine | 55% |
| 31 secs agoX470 GAMING PRO CARBON (MS-7... | UFO | 32% |
| 34 secs agoAsus PRIME B360M-A | Battle cruiser | 50% |
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| 35 secs agoMicrosoft Surface Pro | Battleship | 95% |
| 38 secs agoGigabyte Z370 Aorus Gaming 7 | UFO | 91% |
| 40 secs agoGigabyte GA-AX370-Gaming 5 | UFO | 47% |
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