Athlon II X4 740 vs Athlon II X4 651
Aggregate performance score
Athlon II X4 651 outperforms Athlon II X4 740 by a substantial 34% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1932 | 2166 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Series | no data | Athlon |
| Power efficiency | 2.14 | no data |
| Designer | AMD | AMD |
| Architecture codename | Llano (2011−2012) | Piledriver |
| Release date | 14 November 2011 (13 years ago) | 1 October 2012 (12 years ago) |
| Launch price (MSRP) | no data | $71 |
Detailed specifications
Athlon II X4 651 and Athlon II X4 740 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) | 4 (Quad-Core) |
| Threads | 4 | 4 |
| Base clock speed | 3 GHz | 3.2 GHz |
| Boost clock speed | 3 GHz | 3.7 GHz |
| L1 cache | 128 KB (per core) | 192 KB |
| L2 cache | 1 MB (per core) | 4 MB |
| L3 cache | 0 KB | no data |
| Chip lithography | 32 nm | 32 nm |
| Die size | 228 mm2 | no data |
| Number of transistors | 1,178 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Athlon II X4 651 and Athlon II X4 740 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 | Socket FM2 |
| Power consumption (TDP) | 100 Watt | 65 watt |
Virtualization technologies
Virtual machine speed-up technologies supported by Athlon II X4 651 and Athlon II X4 740 are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon II X4 651 and Athlon II X4 740. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | 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.
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. Other than that, Passmark measures multi-core performance.
Pros & cons summary
| Performance score | 2.23 | 1.67 |
| Power consumption (TDP) | 100 Watt | 65 Watt |
Athlon II X4 651 has a 33.5% higher aggregate performance score.
Athlon II X4 740, on the other hand, has 53.8% lower power consumption.
The AMD Athlon II X4 651 is our recommended choice as it beats the AMD Athlon II X4 740 in performance tests.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
