EPYC 7H12 vs Phenom II X2 B55
Aggregate performance score
EPYC 7H12 outperforms Phenom II X2 B55 by a whopping 5809% based on our aggregate benchmark results.
Primary details
Comparing Phenom II X2 B55 and EPYC 7H12 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2651 | 46 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 2.02 | no data |
| Market segment | Desktop processor | Server |
| Series | no data | AMD EPYC |
| Power efficiency | 0.88 | 14.82 |
| Architecture codename | Callisto (2009−2010) | Zen 2 (2017−2020) |
| Release date | 1 October 2009 (15 years ago) | 18 September 2019 (5 years ago) |
| Launch price (MSRP) | $48 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Phenom II X2 B55 and EPYC 7H12 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) | 64 (Tetrahexaconta-Core) |
| Threads | 2 | 128 |
| Base clock speed | 3 GHz | 2.6 GHz |
| Boost clock speed | 3 GHz | 3.3 GHz |
| Multiplier | no data | 26 |
| L1 cache | 128 KB (per core) | 96K (per core) |
| L2 cache | 512 KB (per core) | 512K (per core) |
| L3 cache | 6 MB (shared) | 256 MB (shared) |
| Chip lithography | 45 nm | 7 nm, 14 nm |
| Die size | 258 mm2 | 192 mm2 |
| Number of transistors | 758 million | 4,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Phenom II X2 B55 and EPYC 7H12 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 (Multiprocessor) |
| Socket | AM3 | TR4 |
| Power consumption (TDP) | 80 Watt | 280 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X2 B55 and EPYC 7H12. 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 X2 B55 and EPYC 7H12 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X2 B55 and EPYC 7H12. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4 Eight-channel |
| Maximum memory size | no data | 4 TiB |
| Max memory channels | no data | 8 |
| Maximum memory bandwidth | no data | 204.763 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | no data |
Peripherals
Specifications and connection of peripherals supported by Phenom II X2 B55 and EPYC 7H12.
| PCIe version | 2.0 | no data |
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 | 0.77 | 45.50 |
| Recency | 1 October 2009 | 18 September 2019 |
| Physical cores | 2 | 64 |
| Threads | 2 | 128 |
| Chip lithography | 45 nm | 7 nm |
| Power consumption (TDP) | 80 Watt | 280 Watt |
Phenom II X2 B55 has 250% lower power consumption.
EPYC 7H12, on the other hand, has a 5809.1% higher aggregate performance score, an age advantage of 9 years, 3100% more physical cores and 6300% more threads, and a 542.9% more advanced lithography process.
The EPYC 7H12 is our recommended choice as it beats the Phenom II X2 B55 in performance tests.
Note that Phenom II X2 B55 is a desktop processor while EPYC 7H12 is a server/workstation one.
Should you still have questions on choice between Phenom II X2 B55 and EPYC 7H12, ask them in Comments section, and we shall answer.
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