Pentium 4 660 vs Pentium D 820
Aggregate performance score
Pentium D 820 outperforms Pentium 4 660 by a considerable 48% based on our aggregate benchmark results.
Primary details
Comparing Pentium D 820 and Pentium 4 660 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3102 | 3210 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Series | Pentium D | Pentium 4 |
| Power efficiency | 0.31 | 0.17 |
| Architecture codename | Smithfield (2005) | Prescott 2M |
| Release date | May 2005 (19 years ago) | no data |
Detailed specifications
Pentium D 820 and Pentium 4 660 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 | 2 (Dual-core) | 1 (Single-Core) |
| Threads | 2 | 1 |
| Base clock speed | 2.8 GHz | 3.6 GHz |
| Boost clock speed | 2.8 GHz | 3.6 GHz |
| Bus rate | 800 MHz | 800 MHz |
| L1 cache | 28 KB | no data |
| L2 cache | 2 MB | no data |
| L3 cache | 0 KB | 2 MB L2 Cache |
| Chip lithography | 90 nm | 90 nm |
| Die size | 206 mm2 | no data |
| Maximum core temperature | 64 °C | 71 °C |
| Number of transistors | 169 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 1.2V-1.4V | 1.2V-1.4V |
Compatibility
Information on Pentium D 820 and Pentium 4 660 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 | 2 | no data |
| Socket | PLGA775 | PLGA775,PPGA775 |
| Power consumption (TDP) | 95 Watt | 115 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium D 820 and Pentium 4 660. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | - | + |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | + |
| Idle States | + | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | - | - |
| PAE | 32 Bit | no data |
| FSB parity | - | - |
Security technologies
Pentium D 820 and Pentium 4 660 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium D 820 and Pentium 4 660 are enumerated here.
| VT-d | - | no data |
| VT-x | - | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium D 820 and Pentium 4 660. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | no data |
Pros & cons summary
| Performance score | 0.31 | 0.21 |
| Physical cores | 2 | 1 |
| Threads | 2 | 1 |
| Power consumption (TDP) | 95 Watt | 115 Watt |
Pentium D 820 has a 47.6% higher aggregate performance score, 100% more physical cores and 100% more threads, and 21.1% lower power consumption.
The Pentium D 820 is our recommended choice as it beats the Pentium 4 660 in performance tests.
Should you still have questions on choice between Pentium D 820 and Pentium 4 660, ask them in Comments section, and we shall answer.
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