Pentium 4 HT 640 vs Phenom II X3 P820
Primary details
Comparing Phenom II X3 P820 and Pentium 4 HT 640 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2738 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | 3x AMD Phenom II | no data |
| Power efficiency | 2.49 | no data |
| Architecture codename | Champlain (2010−2011) | Prescott (2001−2005) |
| Release date | 12 May 2010 (14 years ago) | February 2005 (19 years ago) |
Detailed specifications
Phenom II X3 P820 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 | 3 (Tri-Core) | 1 (Single-Core) |
| Threads | 3 | 2 |
| Boost clock speed | 1.8 GHz | 3.2 GHz |
| Bus rate | 3600 MHz | no data |
| L1 cache | 384 KB | 28 KB |
| L2 cache | 1.5 MB | 2 MB |
| L3 cache | no data | 0 KB |
| Chip lithography | 45 nm | 90 nm |
| Die size | no data | 109 mm2 |
| Number of transistors | no data | 169 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Phenom II X3 P820 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 | no data | 1 |
| Socket | S1 | 775 |
| Power consumption (TDP) | 25 Watt | 84 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X3 P820 and Pentium 4 HT 640. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Virtualization, AMD64, Advanced Virus Protection, SSE(1,2,3,4a) | no data |
| VirusProtect | + | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Phenom II X3 P820 and Pentium 4 HT 640 are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X3 P820 and Pentium 4 HT 640. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR1, DDR2, DDR3 |
Pros & cons summary
| Physical cores | 3 | 1 |
| Threads | 3 | 2 |
| Chip lithography | 45 nm | 90 nm |
| Power consumption (TDP) | 25 Watt | 84 Watt |
Phenom II X3 P820 has 200% more physical cores and 50% more threads, a 100% more advanced lithography process, and 236% lower power consumption.
We couldn't decide between Phenom II X3 P820 and Pentium 4 HT 640. We've got no test results to judge.
Be aware that Phenom II X3 P820 is a notebook processor while Pentium 4 HT 640 is a desktop one.
Should you still have questions on choice between Phenom II X3 P820 and Pentium 4 HT 640, ask them in Comments section, and we shall answer.
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