Ryzen 7 7800X3D vs Pentium D 820
Primary details
Comparing Pentium D 820 and Ryzen 7 7800X3D processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 242 |
| Place by popularity | not in top-100 | 15 |
| Cost-effectiveness evaluation | no data | 38.03 |
| Market segment | Desktop processor | Desktop processor |
| Series | Pentium D | no data |
| Power efficiency | no data | 17.02 |
| Architecture codename | Smithfield (2005) | Raphael (Zen4) (2022−2023) |
| Release date | May 2005 (19 years ago) | 4 January 2023 (1 year ago) |
| Launch price (MSRP) | no data | $449 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Pentium D 820 and Ryzen 7 7800X3D 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) | 8 (Octa-Core) |
| Threads | 2 | 16 |
| Base clock speed | 2.8 GHz | 4.4 GHz |
| Boost clock speed | 2.8 GHz | 5 GHz |
| Bus rate | 800 MHz | 162 MHz |
| L1 cache | 28 KB | 64K (per core) |
| L2 cache | 2 MB | 1 MB (per core) |
| L3 cache | 0 KB | 96 MB (shared) |
| Chip lithography | 90 nm | 5 nm |
| Die size | 206 mm2 | 71 mm2 |
| Maximum core temperature | 64 °C | 89 °C |
| Maximum case temperature (TCase) | no data | 61 °C |
| Number of transistors | 169 million | 6,570 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | - | + |
| VID voltage range | 1.2V-1.4V | no data |
Compatibility
Information on Pentium D 820 and Ryzen 7 7800X3D 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 | 1 |
| Socket | PLGA775 | AM5 |
| Power consumption (TDP) | 95 Watt | 120 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium D 820 and Ryzen 7 7800X3D. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | 86x MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, AVX512, BMI1, BMI2, F16C, FMA3, AMD64, EVP, AMD-V, SMAP, SMEP, SMT SHA, XFR2, Precision Boost 2 |
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | - | no data |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | no data |
| Idle States | + | no data |
| Demand Based Switching | - | no data |
| PAE | 32 Bit | no data |
| FSB parity | - | no data |
| Precision Boost 2 | no data | + |
Security technologies
Pentium D 820 and Ryzen 7 7800X3D technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium D 820 and Ryzen 7 7800X3D are enumerated here.
| AMD-V | - | + |
| VT-d | - | no data |
| VT-x | - | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium D 820 and Ryzen 7 7800X3D. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR5-5200 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | AMD Radeon Graphics (Ryzen 7000) |
Peripherals
Specifications and connection of peripherals supported by Pentium D 820 and Ryzen 7 7800X3D.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 24 |
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.
3DMark06 CPU
3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.
Pros & cons summary
| Physical cores | 2 | 8 |
| Threads | 2 | 16 |
| Chip lithography | 90 nm | 5 nm |
| Power consumption (TDP) | 95 Watt | 120 Watt |
Pentium D 820 has 26.3% lower power consumption.
Ryzen 7 7800X3D, on the other hand, has 300% more physical cores and 700% more threads, and a 1700% more advanced lithography process.
We couldn't decide between Pentium D 820 and Ryzen 7 7800X3D. We've got no test results to judge.
Should you still have questions on choice between Pentium D 820 and Ryzen 7 7800X3D, ask them in Comments section, and we shall answer.
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