EPYC 9255 vs Phenom II X3 P820
Primary details
Comparing Phenom II X3 P820 and EPYC 9255 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2756 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Server |
| Series | 3x AMD Phenom II | no data |
| Power efficiency | 2.50 | no data |
| Architecture codename | Champlain (2010−2011) | Turin (2024) |
| Release date | 12 May 2010 (14 years ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $2,495 |
Detailed specifications
Phenom II X3 P820 and EPYC 9255 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) | 24 (Tetracosa-Core) |
| Threads | 3 | 48 |
| Base clock speed | no data | 3.25 GHz |
| Boost clock speed | 1.8 GHz | 4.8 GHz |
| Bus rate | 3600 MHz | no data |
| L1 cache | 384 KB | 80 KB (per core) |
| L2 cache | 1.5 MB | 1 MB (per core) |
| L3 cache | no data | 128 MB (shared) |
| Chip lithography | 45 nm | 4 nm |
| Die size | no data | 4x 70.6 mm2 |
| Number of transistors | no data | 33,260 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Phenom II X3 P820 and EPYC 9255 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 | 2 |
| Socket | S1 | SP5 |
| Power consumption (TDP) | 25 Watt | 200 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X3 P820 and EPYC 9255. 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 |
| AES-NI | - | + |
| AVX | - | + |
| VirusProtect | + | - |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Phenom II X3 P820 and EPYC 9255 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X3 P820 and EPYC 9255. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | 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 Phenom II X3 P820 and EPYC 9255.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Recency | 12 May 2010 | 10 October 2024 |
| Physical cores | 3 | 24 |
| Threads | 3 | 48 |
| Chip lithography | 45 nm | 4 nm |
| Power consumption (TDP) | 25 Watt | 200 Watt |
Phenom II X3 P820 has 700% lower power consumption.
EPYC 9255, on the other hand, has an age advantage of 14 years, 700% more physical cores and 1500% more threads, and a 1025% more advanced lithography process.
We couldn't decide between Phenom II X3 P820 and EPYC 9255. We've got no test results to judge.
Be aware that Phenom II X3 P820 is a notebook processor while EPYC 9255 is a server/workstation one.
Should you still have questions on choice between Phenom II X3 P820 and EPYC 9255, ask them in Comments section, and we shall answer.
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