CPU clock speed: base, boost, all-core, and how much GHz matters in games
Clock speed is the number of cycles a CPU core executes per second, in gigahertz; the base clock is guaranteed under full load, the boost/turbo clock is the peak one or two cores reach, and the all-core boost is the sustained speed with every core busy. For games the single-core boost matters most, but only together with IPC — modern desktop CPUs run 5.0–5.7 GHz in games, laptops 4.0–5.0 GHz.
GHz · base clock · boost clock · turbo · all-core clock · frequency
Key figures
From the FPSHQ database, as of Oct 15, 2026
The clock terms
Modern CPUs boost opportunistically within power (PPT/PL2), current and temperature limits — see throttling; the advertised boost is reached only with adequate cooling.
| Term | Meaning | Example (Ryzen 7 9800X3D / i7-14700K) |
|---|---|---|
| Base clock | guaranteed under sustained all-core load at TDP | 4.7 GHz / 3.4 GHz |
| Max boost | peak on the best core, briefly | 5.2 GHz / 5.6 GHz |
| All-core boost | typical with all cores loaded; depends on cooling and power limit | ~5.0 GHz / ~5.3 GHz |
| Gaming clock | what the main threads actually run at | usually near max boost |
| E-core clock (Intel) | lower than P-cores | — / 4.3 GHz |
How much FPS per GHz
In CPU-bound games FPS scales roughly 60–80 % as fast as clock speed within the same chip: +10 % clock ≈ +6–8 % FPS, because memory latency does not shrink with core clock. That is why memory tuning and cache matter as much as frequency, and why Intel's 6 GHz 14900KS does not beat a 5.2 GHz 9800X3D. Across generations, compare benchmarks — the FPSHQ CPU catalog lists base/boost clocks next to the measured gaming index.
Laptops: the same chip at 45 W runs 20–30 % lower sustained clocks than at 100 W; game clocks depend on the laptop's power mode and cooling.
Practical notes
Core count and clock trade off within a power budget: fewer cores at higher clocks suit games; many cores at lower clocks suit rendering.
- Enable XMP/EXPO: memory speed affects CPU-bound FPS as much as a few hundred MHz of core clock
- Check that the CPU actually boosts (HWiNFO "effective clock"); poor cooling or BIOS power limits lower it
- Overclocking adds 3–5 % at best on modern chips — PBO/undervolting are the efficient routes
- Old high-GHz CPUs (FX-9590 5 GHz) are slow because of low IPC
On your PC
Enter your GPU (and CPU) — we calculate the effect of "Clock speed" with the unified FPSHQ model using Cyberpunk 2077 as the example.
Save your PC in the account · Detect hardware with the app · Unified FPSHQ model estimate, not a measurement.
Where to use this on FPSHQ
Forum discussions
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What is Clock speed?
Clock speed is the number of cycles a CPU core executes per second, in gigahertz; the base clock is guaranteed under full load, the boost/turbo clock is the peak one or two cores reach, and the all-core boost is the sustained speed with every core busy. For games the single-core boost matters most, but only together with IPC — modern desktop CPUs run 5.0–5.7 GHz in games, laptops 4.0–5.0 GHz.
- most common socket
- LGA1700 · 63
- CPUs with 3D V-Cache
- 12
- median L3 since 2023
- 32 MB
- median L3 in 2015–2017
- 9 MB
FAQ
Is 5 GHz good for gaming?
Does base clock matter?
Why does my CPU not reach its boost clock?
How much FPS does +500 MHz give?
Sources
- Intel: CPU clock speed and gaming (2024)
- AMD: Precision Boost (2024)
FPSHQ Team · methodology · methodology · Updated
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