Ryzen 9 5900XT vs Phenom X4 9550
Aggregate performance score
Ryzen 9 5900XT outperforms Phenom X4 9550 by a whopping 2542% 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 | 2665 | 237 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 71.83 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 0.42 | 10.10 |
| Designer | AMD | AMD |
| Manufacturer | no data | TSMC |
| Architecture codename | Agena (2007−2008) | Vermeer (2020−2025) |
| Release date | March 2008 (17 years ago) | 31 July 2024 (1 year ago) |
| Launch price (MSRP) | no data | $349 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Detailed specifications
Phenom X4 9550 and Ryzen 9 5900XT 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) | 16 (Hexadeca-Core) |
| Threads | 4 | 32 |
| Base clock speed | no data | 3.3 GHz |
| Boost clock speed | 2.2 GHz | 4.8 GHz |
| L1 cache | 128 KB (per core) | 64 KB (per core) |
| L2 cache | 512 KB (per core) | 512 KB (per core) |
| L3 cache | 2 MB (shared) | 64 MB |
| Chip lithography | 65 nm | 7 nm |
| Die size | 285 mm2 | 2x 74 mm2 |
| Number of transistors | 450 million | 8,300 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Phenom X4 9550 and Ryzen 9 5900XT 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+ | AM4 |
| Power consumption (TDP) | 95 Watt | 105 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom X4 9550 and Ryzen 9 5900XT. 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 X4 9550 and Ryzen 9 5900XT are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom X4 9550 and Ryzen 9 5900XT. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR4 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | N/A |
Peripherals
Specifications and connection of peripherals supported by Phenom X4 9550 and Ryzen 9 5900XT.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 20 |
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.
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.
Pros & cons summary
| Performance score | 0.95 | 25.10 |
| Physical cores | 4 | 16 |
| Threads | 4 | 32 |
| Chip lithography | 65 nm | 7 nm |
| Power consumption (TDP) | 95 Watt | 105 Watt |
Phenom X4 9550 has 10.5% lower power consumption.
Ryzen 9 5900XT, on the other hand, has a 2542.1% higher aggregate performance score, 300% more physical cores and 700% more threads, and a 828.6% more advanced lithography process.
The AMD Ryzen 9 5900XT is our recommended choice as it beats the AMD Phenom X4 9550 in performance tests.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
