EPYC 9654 vs Pentium III 1266S
Primary details
Comparing Pentium III 1266S and EPYC 9654 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 5 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 1.30 |
| Market segment | Desktop processor | Server |
| Series | no data | AMD EPYC |
| Power efficiency | no data | 19.42 |
| Architecture codename | Tualatin (2000−2002) | Genoa (2022−2023) |
| Release date | July 2001 (23 years ago) | 10 November 2022 (1 year ago) |
| Launch price (MSRP) | no data | $11,805 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Pentium III 1266S and EPYC 9654 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 | 1 (Single-Core) | 96 |
| Threads | 1 | 192 |
| Base clock speed | no data | 2.4 GHz |
| Boost clock speed | 1.27 GHz | 3.7 GHz |
| Multiplier | no data | 24 |
| L1 cache | 8 KB | 64K (per core) |
| L2 cache | 512 KB | 1 MB (per core) |
| L3 cache | 0 KB | 384 MB (shared) |
| Chip lithography | 130 nm | 5 nm, 6 nm |
| Die size | 80 mm2 | 12x 72 mm2 |
| Maximum case temperature (TCase) | 69 °C | no data |
| Number of transistors | 44 million | 78,840 million |
| 64 bit support | - | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Pentium III 1266S and EPYC 9654 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 | 1 | 2 |
| Socket | 370 | SP5 |
| Power consumption (TDP) | 30 Watt | 360 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium III 1266S and EPYC 9654. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium III 1266S and EPYC 9654 are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium III 1266S and EPYC 9654. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5-4800 |
| Maximum memory size | no data | 6 TiB |
| Maximum memory bandwidth | no data | 460.8 GB/s |
Peripherals
Specifications and connection of peripherals supported by Pentium III 1266S and EPYC 9654.
| 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.
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
| Physical cores | 1 | 96 |
| Threads | 1 | 192 |
| Chip lithography | 130 nm | 5 nm |
| Power consumption (TDP) | 30 Watt | 360 Watt |
Pentium III 1266S has 1100% lower power consumption.
EPYC 9654, on the other hand, has 9500% more physical cores and 19100% more threads, and a 2500% more advanced lithography process.
We couldn't decide between Pentium III 1266S and EPYC 9654. We've got no test results to judge.
Note that Pentium III 1266S is a desktop processor while EPYC 9654 is a server/workstation one.
Should you still have questions on choice between Pentium III 1266S and EPYC 9654, ask them in Comments section, and we shall answer.
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