EPYC 9555P vs Phenom II X4 940 BE
Primary details
Comparing Phenom II X4 940 BE and EPYC 9555P processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Server |
| Architecture codename | Deneb (2009−2011) | Turin (2024) |
| Release date | 8 January 2009 (15 years ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | $275 | $7,983 |
Detailed specifications
Phenom II X4 940 BE and EPYC 9555P 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 | 4 (Quad-Core) | 64 (Tetrahexaconta-Core) |
| Threads | 4 | 128 |
| Base clock speed | 3 GHz | 3.2 GHz |
| Boost clock speed | 3 GHz | 4.4 GHz |
| L1 cache | 128 KB (per core) | 80 KB (per core) |
| L2 cache | 512 KB (per core) | 1 MB (per core) |
| L3 cache | 6 MB (shared) | 256 MB (shared) |
| Chip lithography | 45 nm | 4 nm |
| Die size | 258 mm2 | 8x 70.6 mm2 |
| Number of transistors | 758 million | 66,520 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | + | - |
Compatibility
Information on Phenom II X4 940 BE and EPYC 9555P 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 | 1 |
| Socket | AM2+ | SP5 |
| Power consumption (TDP) | 125 Watt | 360 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X4 940 BE and EPYC 9555P. 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 Phenom II X4 940 BE and EPYC 9555P are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X4 940 BE and EPYC 9555P. 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 | On certain motherboards (Chipset feature) | N/A |
Peripherals
Specifications and connection of peripherals supported by Phenom II X4 940 BE and EPYC 9555P.
| PCIe version | 2.0 | 5.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Recency | 8 January 2009 | 10 October 2024 |
| Physical cores | 4 | 64 |
| Threads | 4 | 128 |
| Chip lithography | 45 nm | 4 nm |
| Power consumption (TDP) | 125 Watt | 360 Watt |
Phenom II X4 940 BE has 188% lower power consumption.
EPYC 9555P, on the other hand, has an age advantage of 15 years, 1500% more physical cores and 3100% more threads, and a 1025% more advanced lithography process.
We couldn't decide between Phenom II X4 940 BE and EPYC 9555P. We've got no test results to judge.
Note that Phenom II X4 940 BE is a desktop processor while EPYC 9555P is a server/workstation one.
Should you still have questions on choice between Phenom II X4 940 BE and EPYC 9555P, ask them in Comments section, and we shall answer.
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