EPYC 7643 vs Phenom II X4 B95
Aggregate performance score
EPYC 7643 outperforms Phenom II X4 B95 by a whopping 3048% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2513 | 81 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 2.60 | 4.60 |
| Market segment | Desktop processor | Server |
| Series | no data | AMD EPYC |
| Power efficiency | 0.62 | 8.17 |
| Designer | AMD | AMD |
| Manufacturer | GlobalFoundries | TSMC |
| Architecture codename | Deneb (2009−2011) | Milan (2021−2023) |
| Release date | 1 October 2009 (16 years ago) | 15 March 2021 (5 years ago) |
| Launch price (MSRP) | $80 | $4,995 |
Cost-effectiveness evaluation
Performance per price, higher is better.
EPYC 7643 has 77% better value for money than Phenom II X4 B95.
Performance to price scatter graph
Currently popular graphics cards are shown for comparison.
Detailed specifications
Basic parameters of Phenom II X4 B95 and EPYC 7643: 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) | 48 (Octatetraconta-Core) |
| Threads | 4 | 96 |
| Base clock speed | 3 GHz | 2.3 GHz |
| Boost clock speed | 3 GHz | 3.6 GHz |
| Multiplier | no data | 23 |
| L1 cache | 128 KB (per core) | 64 KB (per core) |
| L2 cache | 512 KB (per core) | 512 KB (per core) |
| L3 cache | 6 MB (shared) | 256 MB (shared) |
| Chip lithography | 45 nm | 7 nm+ |
| Die size | 258 mm2 | 8x 81 mm2 |
| Number of transistors | 758 million | 33,200 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
Compatibility
Information on Phenom II X4 B95 and EPYC 7643 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 | AM3 | SP3 |
| Power consumption (TDP) | 95 Watt | 225 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X4 B95 and EPYC 7643. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Phenom II X4 B95 and EPYC 7643 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X4 B95 and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4-3200 |
| Maximum memory size | no data | 4 TiB |
| Maximum memory bandwidth | no data | 204.795 GB/s |
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 B95 and EPYC 7643.
| PCIe version | 2.0 | 4.0 |
| PCI Express lanes | no data | 128 |
Synthetic benchmarks
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.
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. Other than that, Passmark measures multi-core performance.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Pros & cons summary
| Performance score | 1.40 | 44.07 |
| Recency | 1 October 2009 | 15 March 2021 |
| Physical cores | 4 | 48 |
| Threads | 4 | 96 |
| Chip lithography | 45 nm | 7 nm |
| Power consumption (TDP) | 95 Watt | 225 Watt |
Phenom II X4 B95 has 137% lower power consumption.
EPYC 7643, on the other hand, has a 3048% higher aggregate performance score, an age advantage of 11 years, 1100% more physical cores and 2300% more threads, and a 543% more advanced lithography process.
The AMD EPYC 7643 is our recommended choice as it beats the AMD Phenom II X4 B95 in performance tests.
Note that Phenom II X4 B95 is a desktop processor while EPYC 7643 is a server/workstation one.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
