Pentium 4 HT 651 vs Athlon 64 FX-51
Primary details
Comparing Athlon 64 FX-51 and Pentium 4 HT 651 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 | SledgeHammer (2003−2004) | Cedar Mill (2006) |
| Release date | September 2003 (20 years ago) | January 2006 (18 years ago) |
| Current price | $30 | $95 |
Detailed specifications
Athlon 64 FX-51 and Pentium 4 HT 651 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 |
| Boost clock speed | 2.2 GHz | 3.4 GHz |
| L1 cache | 128 KB | 28 KB |
| L2 cache | 1 MB | 2 MB |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 130 nm | 65 nm |
| Die size | 193 mm2 | 81 mm2 |
| Number of transistors | 105 million | 188 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
Compatibility
Information on Athlon 64 FX-51 and Pentium 4 HT 651 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 | 940 | 775 |
| Power consumption (TDP) | 89 Watt | 86 Watt |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon 64 FX-51 and Pentium 4 HT 651. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR1, DDR2, DDR3 |
Pros & cons summary
| Threads | 1 | 2 |
| Chip lithography | 130 nm | 65 nm |
| Power consumption (TDP) | 89 Watt | 86 Watt |
We couldn't decide between Athlon 64 FX-51 and Pentium 4 HT 651. We've got no test results to judge.
Should you still have questions on choice between Athlon 64 FX-51 and Pentium 4 HT 651, ask them in Comments section, and we shall answer.
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