EPYC 9655P vs Pentium D 820
Aggregate performance score
EPYC 9655P outperforms Pentium D 820 by a whopping 32158% based on our aggregate benchmark results.
Primary details
Comparing Pentium D 820 and EPYC 9655P processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3101 | 1 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 2.62 |
| Market segment | Desktop processor | Server |
| Series | Pentium D | no data |
| Power efficiency | 0.31 | 23.66 |
| Architecture codename | Smithfield (2005) | Turin (2024) |
| Release date | May 2005 (19 years ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $10,811 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Pentium D 820 and EPYC 9655P 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) | 96 |
| Threads | 2 | 192 |
| Base clock speed | 2.8 GHz | 2.6 GHz |
| Boost clock speed | 2.8 GHz | 4.5 GHz |
| Bus rate | 800 MHz | no data |
| L1 cache | 28 KB | 80 KB (per core) |
| L2 cache | 2 MB | 1 MB (per core) |
| L3 cache | 0 KB | 384 MB (shared) |
| Chip lithography | 90 nm | 4 nm |
| Die size | 206 mm2 | 12x 70.6 mm2 |
| Maximum core temperature | 64 °C | no data |
| Number of transistors | 169 million | 99,780 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| VID voltage range | 1.2V-1.4V | no data |
Compatibility
Information on Pentium D 820 and EPYC 9655P 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 | SP5 |
| Power consumption (TDP) | 95 Watt | 400 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium D 820 and EPYC 9655P. You'll probably need this information if you require some particular technology.
| 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 EPYC 9655P 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 EPYC 9655P 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 EPYC 9655P. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | N/A |
Peripherals
Specifications and connection of peripherals supported by Pentium D 820 and EPYC 9655P.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 128 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
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.
Pros & cons summary
| Performance score | 0.31 | 100.00 |
| Physical cores | 2 | 96 |
| Threads | 2 | 192 |
| Chip lithography | 90 nm | 4 nm |
| Power consumption (TDP) | 95 Watt | 400 Watt |
Pentium D 820 has 321.1% lower power consumption.
EPYC 9655P, on the other hand, has a 32158.1% higher aggregate performance score, 4700% more physical cores and 9500% more threads, and a 2150% more advanced lithography process.
The EPYC 9655P is our recommended choice as it beats the Pentium D 820 in performance tests.
Note that Pentium D 820 is a desktop processor while EPYC 9655P is a server/workstation one.
Should you still have questions on choice between Pentium D 820 and EPYC 9655P, ask them in Comments section, and we shall answer.
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