AMD Epyc 7551 vs AMD Phenom II X4 955
VS
AMD Epyc 7551
AMD Phenom II X4 955
Key Differences
Performance
Features
General info
Memory
Benchmarks
AMD Epyc 7551
AMD Phenom II X4 955
Key Differences
|
AMD Epyc 7551 | AMD Phenom II X4 955 |
|---|---|---|
| Cores | 32 | 4 |
| CPU Threads | 64 | 4 |
| Base Clock Speed | 2GHz | 3.2GHz |
| Turbo Clock Speed | 3GHz | Not Known |
| TDP (THERMAL DESIGN POINT) | 180W | 125W |
| Has integrated graphics |  No
|
No
|
| Performance per watt | Not Known | 49.0 |
Performance
|
AMD Epyc 7551 | AMD Phenom II X4 955 |
|---|---|---|
| CPU Speed & Cores | 32 x 2GHz | 4 x 3.2GHz |
| Number of CPU Threads | 64 | 4 |
| L2 Cache Size | 16MB | 2MB |
| L3 Cache Size | 64MB | 6MB |
| Turbo Boost Frequency | 3GHz | Not Known |
| L1 Cache Size | 3072KB | 512KB |
| L2 Core | 0.5MB/core | 0.5MB/core |
| L3 Core | 2MB/core | 1.5MB/core |
| Does it have an unlocked multiplier | No
|
 Yes
|
| Uses ARM big.LITTLE tech | No
|
No
|
| Uses ARM HMP | No
|
No
|
| Clock Multiplier | Not Known | 16 |
Features
|
AMD Epyc 7551 | AMD Phenom II X4 955 |
|---|---|---|
| Has AES Support | Yes
|
No
|
| Supported SSE Version | 4.2 | 4 |
| Has AVX Support | Yes
|
No
|
| Has MMX Tech Support | Yes
|
Yes
|
| Has F16C Support | Yes
|
No
|
| Has NX Processor Bit Support | Yes
|
Yes
|
| Has FMA3 Instructions Support | Yes
|
No
|
| Supports CPU Throttling | No
|
Yes
|
| Supports ARM TrustZone Tech | No
|
No
|
| Has FMA4 Instructions Support | No
|
No
|
| Has Multithreading Tech Support | No
|
No
|
General info
|
AMD Epyc 7551 | AMD Phenom II X4 955 |
|---|---|---|
| Has 64-bit Support | No Data Found | No Data Found |
| Semiconductor Size | 14nm | 45nm |
| TDP (Thermal Design Point) | 180W | 125W |
| PCI Express Version | 3 | 2 |
| Transistor Count | 19200 million | 758 million |
| Does it have Integrated Graphics | No
|
No
|
| Supports Power Optimized L2 Cache | No
|
No
|
Memory
|
AMD Epyc 7551 | AMD Phenom II X4 955 |
|---|---|---|
| RAM Memory Speed | 2666MHz | 1333MHz |
| Max Memory Bandwidth | 341GB/s | 21.3GB/s |
| Max Memory Channels | 8 | 2 |
| Supported Memory Size | 2000GB | Not Known |
| ECC (Error-Correcting Code) Memory Support | Yes
|
No
|
| DDR Type Memory Version | 4 | Not Known |
Benchmarks
|
AMD Epyc 7551 | AMD Phenom II X4 955 |
|---|---|---|
| PassMark Score | 19606 | 4023 |
| PassMark Score (Single Thread) | 1660 | 1121 |
| PassMark Score (Overclocked) | Not Known | 4754 |
| CPU Performance (Per Watt) | Not Known | 49.0 |
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