Phenom II X4 P940 vs Athlon X4 840
Primary details
Comparing Athlon X4 840 and Phenom II X4 P940 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1890 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | 4x Athlon | 4x AMD Phenom II |
| Power efficiency | 3.04 | no data |
| Architecture codename | Kaveri (2014−2015) | Champlain (2010−2011) |
| Release date | August 2014 (10 years ago) | 4 October 2010 (14 years ago) |
Detailed specifications
Athlon X4 840 and Phenom II X4 P940 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 | 3.1 GHz | no data |
| Boost clock speed | 3.8 GHz | 1.7 GHz |
| Bus rate | no data | 3600 MHz |
| L1 cache | 256K | 512 KB |
| L2 cache | 4 MB | 2 MB |
| Chip lithography | 28 nm | 45 nm |
| Die size | 245 mm2 | no data |
| Maximum case temperature (TCase) | 72 °C | no data |
| Number of transistors | 2,411 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Athlon X4 840 and Phenom II X4 P940 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 | no data |
| Socket | Socket FM2+ | S1 (S1g4) |
| Power consumption (TDP) | 65 watt | 25 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Athlon X4 840 and Phenom II X4 P940. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | MMX, 3DNow, SSE (1,2,3,4A), AMD64, Enhanced Virus Protection, Virtualization, HyperTransport 3.0 |
| AES-NI | + | - |
| FMA | + | - |
| AVX | + | - |
| VirusProtect | - | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Athlon X4 840 and Phenom II X4 P940 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon X4 840 and Phenom II X4 P940. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
Peripherals
Specifications and connection of peripherals supported by Athlon X4 840 and Phenom II X4 P940.
| PCIe version | 3.0 | no data |
| PCI Express lanes | 16 | no data |
Pros & cons summary
| Recency | on August 2014 | 4 October 2010 |
| Chip lithography | 28 nm | 45 nm |
| Power consumption (TDP) | 65 Watt | 25 Watt |
Athlon X4 840 has an age advantage of 3 years, and a 60.7% more advanced lithography process.
Phenom II X4 P940, on the other hand, has 160% lower power consumption.
We couldn't decide between Athlon X4 840 and Phenom II X4 P940. We've got no test results to judge.
Note that Athlon X4 840 is a desktop processor while Phenom II X4 P940 is a notebook one.
Should you still have questions on choice between Athlon X4 840 and Phenom II X4 P940, 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.
