Celeron 420 vs Athlon II X4 635
Aggregate performance score
Athlon II X4 635 outperforms Celeron 420 by a whopping 840% based on our aggregate benchmark results.
Primary details
Comparing Athlon II X4 635 and Celeron 420 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2223 | 3324 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 2.86 | no data |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 1.40 | 0.41 |
| Architecture codename | Propus (2009−2011) | Conroe-L (2007−2008) |
| Release date | 25 January 2010 (14 years ago) | June 2007 (17 years ago) |
| Launch price (MSRP) | $70 | $23 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Athlon II X4 635 and Celeron 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 | 4 (Quad-Core) | 1 (Single-Core) |
| Threads | 4 | 1 |
| Base clock speed | 2.9 GHz | 1.6 GHz |
| Boost clock speed | 2.9 GHz | 1.6 GHz |
| L1 cache | 128 KB (per core) | 64 KB |
| L2 cache | 512 KB (per core) | 512 KB |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 45 nm | 65 nm |
| Die size | 169 mm2 | 77 mm2 |
| Maximum case temperature (TCase) | no data | 60 °C |
| Number of transistors | 300 million | 105 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | no data | 1V-1.3375V |
Compatibility
Information on Athlon II X4 635 and Celeron 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.
| Number of CPUs in a configuration | 1 | 1 |
| Socket | AM3 | LGA775 |
| Power consumption (TDP) | 95 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Athlon II X4 635 and Celeron 420. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | no data | - |
| Turbo Boost Technology | no data | - |
| Hyper-Threading Technology | no data | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | no data | - |
| FSB parity | no data | - |
Security technologies
Athlon II X4 635 and Celeron 420 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | - |
| EDB | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Athlon II X4 635 and Celeron 420 are enumerated here.
| VT-d | no data | - |
| VT-x | no data | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon II X4 635 and Celeron 420. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR1, DDR2, DDR3 |
Peripherals
Specifications and connection of peripherals supported by Athlon II X4 635 and Celeron 420.
| PCIe version | 2.0 | no data |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
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.
Pros & cons summary
| Performance score | 1.41 | 0.15 |
| Physical cores | 4 | 1 |
| Threads | 4 | 1 |
| Chip lithography | 45 nm | 65 nm |
| Power consumption (TDP) | 95 Watt | 35 Watt |
Athlon II X4 635 has a 840% higher aggregate performance score, 300% more physical cores and 300% more threads, and a 44.4% more advanced lithography process.
Celeron 420, on the other hand, has 171.4% lower power consumption.
The Athlon II X4 635 is our recommended choice as it beats the Celeron 420 in performance tests.
Should you still have questions on choice between Athlon II X4 635 and Celeron 420, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
