Pentium 4 HT 640 vs Athlon 64 FX-55
Primary details
Comparing Athlon 64 FX-55 and Pentium 4 HT 640 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3211 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 0.23 | no data |
| Architecture codename | Clawhammer (2001−2005) | Prescott (2001−2005) |
| Release date | 10 October 2004 (20 years ago) | February 2005 (20 years ago) |
| Launch price (MSRP) | $180 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Athlon 64 FX-55 and Pentium 4 HT 640 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) | 1 (Single-Core) |
| Threads | 1 | 2 |
| Base clock speed | 2.6 GHz | no data |
| Boost clock speed | 2.6 GHz | 3.2 GHz |
| L1 cache | 128 KB | 28 KB |
| L2 cache | 1 MB | 2 MB |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 130 nm | 90 nm |
| Die size | 193 mm2 | 109 mm2 |
| Maximum case temperature (TCase) | 63 °C | no data |
| Number of transistors | 105 million | 169 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Athlon 64 FX-55 and Pentium 4 HT 640 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 | 775 |
| Power consumption (TDP) | 104 Watt | 84 Watt |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon 64 FX-55 and Pentium 4 HT 640. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1 Depends on motherboard | DDR1, DDR2, DDR3 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | no data |
Pros & cons summary
| Threads | 1 | 2 |
| Chip lithography | 130 nm | 90 nm |
| Power consumption (TDP) | 104 Watt | 84 Watt |
Pentium 4 HT 640 has 100% more threads, a 44.4% more advanced lithography process, and 23.8% lower power consumption.
We couldn't decide between Athlon 64 FX-55 and Pentium 4 HT 640. We've got no test results to judge.
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