Athlon X4 840: specs and benchmarks
Aggregate performance score
Athlon X4 840 provides poor benchmark performance at 2.09% of a leader's which is a 96-core EPYC 9655P.
Summary
AMD started Athlon X4 840 sales on August 2014. This is a Kaveri architecture desktop processor primarily aimed at office systems. It has 4 cores and 4 threads, and is based on 28 nm manufacturing technology, with a max turbo frequency of 3800 MHz and an unlocked multiplier.
Compatibility-wise, this is Socket FM2+ processor with a TDP of 65 watt and a maximum temperature of 72 °C. It supports DDR3 memory.
Primary details
Athlon X4 840 processor market type (desktop or notebook), architecture, sales start time and pricing.
| Place in the ranking | 1874 | |
| Place by popularity | not in top-100 | |
| Market segment | Desktop processor | |
| Series | 4x Athlon | |
| Power efficiency | 3.04 | of 100.00 (Core Ultra 7 164U) |
| Architecture codename | Kaveri (2014−2015) | |
| Release date | August 2014 (10 years ago) |
Detailed specifications
Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.
| Physical cores | 4 (Quad-Core) | |
| Threads | 4 | |
| Base clock speed | 3.1 GHz | of 4.7 GHz (FX-9590) |
| Boost clock speed | 3.8 GHz | of 6.2 GHz (Core i9-14900KS) |
| L1 cache | 256K | of 80 KB (EPYC 9965) |
| L2 cache | 4 MB | of 2 MB (Xeon 6980P) |
| Chip lithography | 28 nm | of 3 nm (Apple M3 Max 16-Core) |
| Die size | 245 mm2 | |
| Maximum case temperature (TCase) | 72 °C | of 105 °C (Core i7-5950HQ) |
| Number of transistors | 2,411 million | of 135,240 million (EPYC 9684X) |
| 64 bit support | + | |
| Windows 11 compatibility | - | |
| Unlocked multiplier | + |
Compatibility
Information on Athlon X4 840 compatibility with other computer components and devices: 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 | of 8 (Opteron 842) |
| Socket | Socket FM2+ | |
| Power consumption (TDP) | 65 watt | of 3100 ‑ 4500 (Ryzen 7 7435H) |
Technologies and extensions
Technological capabilities and additional instructions supported by Athlon X4 840. You'll probably need this information if you require some particular technology.
| AES-NI | + | |
| FMA | + | |
| AVX | + |
Virtualization technologies
Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.
| AMD-V | + |
Memory specs
Types, maximum amount and channel number of RAM supported by Athlon X4 840's memory controller. Depending on the motherboard, higher memory frequency may be supported.
| Supported memory types | DDR3 |
Peripherals
Specifications and connection types of supported peripherals.
| PCIe version | 3.0 | of 5.0 (Core i9-12900K) |
| PCI Express lanes | 16 | of 128 (EPYC 7551P) |
Benchmark performance
Single-core and multi-core benchmark results of Athlon X4 840. Overall benchmark performance 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.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Send your test results of Athlon X4 840.
Intel equivalent
According to our data, the closest Intel alternative to Athlon X4 840 is Core i3-4130, which is nearly equal in speed and lower by 4 positions in our ranking.
Here are some closest Intel rivals to Athlon X4 840:
Similar processors
Here is our recommendation of several processors that are more or less close in performance to the one reviewed.
Recommended GPUs
People consider these graphics cards to be good for Athlon X4 840, according to our PC configuration statistics.
These are the fastest graphics cards for Athlon X4 840 in our user configuration statistics. There is a total of 8751 configurations using Athlon X4 840 in our database.
