Sempron 145 vs Athlon II X4 638
Primary details
Comparing Athlon II X4 638 and Sempron 145 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2189 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 2.06 | no data |
| Architecture codename | Llano (2011−2012) | Sargas (2009−2011) |
| Release date | 6 February 2012 (12 years ago) | 1 September 2010 (14 years ago) |
| Launch price (MSRP) | no data | $95 |
Detailed specifications
Athlon II X4 638 and Sempron 145 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 | 2.7 GHz | 2.8 GHz |
| Boost clock speed | 2.7 GHz | 2.8 GHz |
| L1 cache | 128 KB (per core) | 128 KB (per core) |
| L2 cache | 1 MB (per core) | 1 MB (per core) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 32 nm | 45 nm |
| Die size | 228 mm2 | 117 mm2 |
| Number of transistors | 1,178 million | 234 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Athlon II X4 638 and Sempron 145 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 | FM1 | AM3 |
| Power consumption (TDP) | 65 Watt | 45 Watt |
Virtualization technologies
Virtual machine speed-up technologies supported by Athlon II X4 638 and Sempron 145 are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon II X4 638 and Sempron 145. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
Peripherals
Specifications and connection of peripherals supported by Athlon II X4 638 and Sempron 145.
| PCIe version | no data | 2.0 |
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.
Pros & cons summary
| Recency | 6 February 2012 | 1 September 2010 |
| Physical cores | 4 | 1 |
| Threads | 4 | 1 |
| Chip lithography | 32 nm | 45 nm |
| Power consumption (TDP) | 65 Watt | 45 Watt |
Athlon II X4 638 has an age advantage of 1 year, 300% more physical cores and 300% more threads, and a 40.6% more advanced lithography process.
Sempron 145, on the other hand, has 44.4% lower power consumption.
We couldn't decide between Athlon II X4 638 and Sempron 145. We've got no test results to judge.
Should you still have questions on choice between Athlon II X4 638 and Sempron 145, ask them in Comments section, and we shall answer.
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