Celeron M 420 vs M 520
Primary Details
Comparing Celeron M 520 and Celeron M 420 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Celeron M | Celeron M |
| Architecture codename | Merom (2006−2008) | Yonah (2005−2006) |
| Release date | no data | no data |
| Current price | $140 | $145 |
Detailed Specifications
Celeron M 520 and Celeron M 420 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 1 (Single-Core) | 1 (Single-Core) |
| Threads | 1 | 1 |
| Base clock speed | 1.6 GHz | 1.6 GHz |
| Boost clock speed | 1.6 GHz | 1.6 GHz |
| Bus support | 533 MHz | 533 MHz |
| L3 cache | 1 MB L2 Cache | 1 MB L2 KB |
| Chip lithography | 65 nm | 65 nm |
| Maximum core temperature | 100 °C | 100 °C |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
| VID voltage range | 0.95V-1.3V | 1.0V-1.3V |
Compatibility
Information on Celeron M 520 and Celeron M 420 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Socket | PPGA478 | PPGA478 |
| Power consumption (TDP) | 30 Watt | 27 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Celeron M 520 and Celeron M 420. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | - | - |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | - | - |
| Demand Based Switching | - | - |
| FSB parity | - | - |
| Status | Discontinued | Discontinued |
Security technologies
Celeron M 520 and Celeron M 420 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Celeron M 520 and Celeron M 420 are enumerated here.
| VT-x | - | - |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Benchmark coverage: 68%
M 520 outperforms M 420 by 72% in Passmark.
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