Phenom II X4 955 (125W) vs Athlon 64 FX-55
Primary details
Comparing Athlon 64 FX-55 and Phenom II X4 955 (125W) processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Architecture codename | Clawhammer (2001−2005) | Deneb (2009−2011) |
| Release date | 10 October 2004 (19 years ago) | 1 April 2009 (15 years ago) |
| Launch price (MSRP) | $180 | no data |
Detailed specifications
Athlon 64 FX-55 and Phenom II X4 955 (125W) 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 | 1 (Single-Core) | 4 (Quad-Core) |
| Threads | 1 | 4 |
| Base clock speed | 2.6 GHz | 3.2 GHz |
| Boost clock speed | 2.6 GHz | 3.2 GHz |
| L1 cache | 128 KB | 128 KB (per core) |
| L2 cache | 1 MB | 512 KB (per core) |
| L3 cache | 0 KB | 6 MB (shared) |
| Chip lithography | 130 nm | 45 nm |
| Die size | 193 mm2 | 258 mm2 |
| Maximum case temperature (TCase) | 63 °C | no data |
| Number of transistors | 105 million | 758 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Athlon 64 FX-55 and Phenom II X4 955 (125W) 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 | 939 | AM3 |
| Power consumption (TDP) | 104 Watt | 125 Watt |
Virtualization technologies
Virtual machine speed-up technologies supported by Athlon 64 FX-55 and Phenom II X4 955 (125W) are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon 64 FX-55 and Phenom II X4 955 (125W). Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1 Depends on motherboard | DDR3 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | On certain motherboards (Chipset feature) |
Peripherals
Specifications and connection of peripherals supported by Athlon 64 FX-55 and Phenom II X4 955 (125W).
| PCIe version | no data | 2.0 |
Pros & cons summary
| Recency | 10 October 2004 | 1 April 2009 |
| Physical cores | 1 | 4 |
| Threads | 1 | 4 |
| Chip lithography | 130 nm | 45 nm |
| Power consumption (TDP) | 104 Watt | 125 Watt |
Athlon 64 FX-55 has 20.2% lower power consumption.
Phenom II X4 955 (125W), on the other hand, has an age advantage of 4 years, 300% more physical cores and 300% more threads, and a 188.9% more advanced lithography process.
We couldn't decide between Athlon 64 FX-55 and Phenom II X4 955 (125W). We've got no test results to judge.
Should you still have questions on choice between Athlon 64 FX-55 and Phenom II X4 955 (125W), 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.
