Phenom II X6 1055T (95W) vs EPYC 7551
Aggregate performance score
EPYC 7551 outperforms Phenom II X6 1055T (95W) by a whopping 423% based on our aggregate benchmark results.
Primary details
Comparing EPYC 7551 and Phenom II X6 1055T (95W) processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 399 | 1609 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.26 | no data |
| Market segment | Server | Desktop processor |
| Series | AMD EPYC | no data |
| Power efficiency | 8.59 | 3.11 |
| Architecture codename | Naples (2017−2018) | Thuban (2010) |
| Release date | 20 June 2017 (7 years ago) | 1 May 2010 (14 years ago) |
| Launch price (MSRP) | $3,400 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
EPYC 7551 and Phenom II X6 1055T (95W) 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 | 32 (Dotriaconta-Core) | 6 (Hexa-Core) |
| Threads | 64 | 6 |
| Base clock speed | 2 GHz | 2.8 GHz |
| Boost clock speed | 2 GHz | 3.3 GHz |
| Multiplier | 20 | no data |
| L1 cache | 3 MB | 128 KB (per core) |
| L2 cache | 16 MB | 512 KB (per core) |
| L3 cache | 64 MB (shared) | 6 MB (shared) |
| Chip lithography | 14 nm | 45 nm |
| Die size | 213 mm2 | 346 mm2 |
| Number of transistors | 19200 Million | 904 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on EPYC 7551 and Phenom II X6 1055T (95W) 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 (Multiprocessor) | 1 |
| Socket | TR4 | AM3 |
| Power consumption (TDP) | 180 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 7551 and Phenom II X6 1055T (95W). You'll probably need this information if you require some particular technology.
| AES-NI | + | - |
| AVX | + | - |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 7551 and Phenom II X6 1055T (95W) are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 7551 and Phenom II X6 1055T (95W). Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Eight-channel | DDR3 |
| Maximum memory size | 2 TiB | no data |
| Max memory channels | 8 | no data |
| Maximum memory bandwidth | 170.671 GB/s | no data |
| ECC memory support | + | - |
Peripherals
Specifications and connection of peripherals supported by EPYC 7551 and Phenom II X6 1055T (95W).
| PCIe version | 3.0 | 2.0 |
| PCI Express lanes | 128 | 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 | 16.96 | 3.24 |
| Recency | 20 June 2017 | 1 May 2010 |
| Physical cores | 32 | 6 |
| Threads | 64 | 6 |
| Chip lithography | 14 nm | 45 nm |
| Power consumption (TDP) | 180 Watt | 95 Watt |
EPYC 7551 has a 423.5% higher aggregate performance score, an age advantage of 7 years, 433.3% more physical cores and 966.7% more threads, and a 221.4% more advanced lithography process.
Phenom II X6 1055T (95W), on the other hand, has 89.5% lower power consumption.
The EPYC 7551 is our recommended choice as it beats the Phenom II X6 1055T (95W) in performance tests.
Be aware that EPYC 7551 is a server/workstation processor while Phenom II X6 1055T (95W) is a desktop one.
Should you still have questions on choice between EPYC 7551 and Phenom II X6 1055T (95W), ask them in Comments section, and we shall answer.
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