Core i7-1255U vs Athlon 64 FX-55
Primary details
Comparing Athlon 64 FX-55 and Core i7-1255U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | not rated | 805 |
| Place by popularity | not in top-100 | 88 |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Alder Lake-M |
| Architecture codename | Clawhammer (2001−2005) | Alder Lake-U (2022) |
| Release date | 10 October 2004 (19 years ago) | 23 February 2022 (2 years ago) |
| Launch price (MSRP) | $180 | no data |
| Current price | $65 (0.4x MSRP) | no data |
Detailed specifications
Athlon 64 FX-55 and Core i7-1255U 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) | 10 (Deca-Core) |
| Threads | 1 | 12 |
| Base clock speed | 2.6 GHz | 1.7 GHz |
| Boost clock speed | 2.6 GHz | 4.7 GHz |
| L1 cache | 128 KB | 80K (per core) |
| L2 cache | 1 MB | 1.25 MB (per core) |
| L3 cache | 0 KB | 12 MB (shared) |
| Chip lithography | 130 nm | Intel 7 nm |
| Die size | 193 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 63 °C | no data |
| Number of transistors | 105 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | Yes | No |
Compatibility
Information on Athlon 64 FX-55 and Core i7-1255U 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 | FCBGA1744 |
| Power consumption (TDP) | 104 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Athlon 64 FX-55 and Core i7-1255U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | no data | + |
| FMA | no data | + |
| AVX | no data | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | no data | + |
| Hyper-Threading Technology | no data | + |
| TSX | no data | + |
| Thermal Monitoring | no data | + |
| Flex Memory Access | no data | + |
| Status | no data | Launched |
Security technologies
Athlon 64 FX-55 and Core i7-1255U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Athlon 64 FX-55 and Core i7-1255U are enumerated here.
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon 64 FX-55 and Core i7-1255U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1 Depends on motherboard | DDR4, DDR5 |
| Maximum memory size | no data | 64 GB |
| Max memory channels | no data | 2 |
| ECC memory support | no data | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | Intel® Iris® Xe Graphics eligible |
| Quick Sync Video | no data | + |
| Graphics max frequency | no data | 1.25 GHz |
| Execution Units | no data | 96 |
Graphics interfaces
Available interfaces and connections of Athlon 64 FX-55 and Core i7-1255U integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Athlon 64 FX-55 and Core i7-1255U integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 4096 x 2304 @ 60Hz |
| Max resolution over eDP | no data | 4096 x 2304 @ 120Hz |
| Max resolution over DisplayPort | no data | 7680 x 4320 @ 60Hz |
Graphics API support
APIs supported by Athlon 64 FX-55 and Core i7-1255U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12.1 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Athlon 64 FX-55 and Core i7-1255U.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 20 |
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.
Benchmark coverage: 68%
Core i7-1255U outperforms Athlon 64 FX-55 by 3302% in Passmark.
Pros & cons summary
| Recency | 10 October 2004 | 23 February 2022 |
| Physical cores | 1 | 10 |
| Threads | 1 | 12 |
| Power consumption (TDP) | 104 Watt | 15 Watt |
We couldn't decide between Athlon 64 FX-55 and Core i7-1255U. We've got no test results to judge.
Note that Athlon 64 FX-55 is a desktop processor while Core i7-1255U is a notebook one.
Should you still have questions on choice between Athlon 64 FX-55 and Core i7-1255U, ask them in Comments section, and we shall answer.
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