EPYC 9555 vs Ryzen 9 9900X
Aggregate performance score
EPYC 9555 outperforms Ryzen 9 9900X by a whopping 143% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 9900X and EPYC 9555 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 113 | 6 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 67.08 | 3.05 |
| Market segment | Desktop processor | Server |
| Power efficiency | 27.18 | 22.02 |
| Architecture codename | Granite Ridge (2024−2025) | Turin (2024) |
| Release date | 15 August 2024 (less than a year ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | $499 | $9,826 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Ryzen 9 9900X has 2099% better value for money than EPYC 9555.
Detailed specifications
Ryzen 9 9900X and EPYC 9555 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 | 12 (Dodeca-Core) | 64 (Tetrahexaconta-Core) |
| Threads | 24 | 128 |
| Base clock speed | 4.4 GHz | 3.2 GHz |
| Boost clock speed | 5.6 GHz | 4.4 GHz |
| L1 cache | 80 KB (per core) | 80 KB (per core) |
| L2 cache | 1 MB (per core) | 1 MB (per core) |
| L3 cache | 64 MB (shared) | 256 MB (shared) |
| Chip lithography | 4 nm | 4 nm |
| Die size | 2x 70.6 mm2 | 8x 70.6 mm2 |
| Maximum core temperature | 95 °C | no data |
| Number of transistors | 16,630 million | 66,520 million |
| 64 bit support | + | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 9900X and EPYC 9555 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 | AM5 | SP5 |
| Power consumption (TDP) | 120 Watt | 360 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 9900X and EPYC 9555. You'll probably need this information if you require some particular technology.
| Instruction set extensions | SMT, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A | no data |
| AES-NI | + | + |
| AVX | + | + |
| Precision Boost 2 | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 9900X and EPYC 9555 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 9900X and EPYC 9555. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon Graphics | N/A |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 9900X and EPYC 9555.
| PCIe version | 5.0 | 5.0 |
| PCI Express lanes | 24 | 128 |
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 | 34.22 | 83.20 |
| Recency | 15 August 2024 | 10 October 2024 |
| Physical cores | 12 | 64 |
| Threads | 24 | 128 |
| Power consumption (TDP) | 120 Watt | 360 Watt |
Ryzen 9 9900X has 200% lower power consumption.
EPYC 9555, on the other hand, has a 143.1% higher aggregate performance score, an age advantage of 1 month, and 433.3% more physical cores and 433.3% more threads.
The EPYC 9555 is our recommended choice as it beats the Ryzen 9 9900X in performance tests.
Note that Ryzen 9 9900X is a desktop processor while EPYC 9555 is a server/workstation one.
Should you still have questions on choice between Ryzen 9 9900X and EPYC 9555, ask them in Comments section, and we shall answer.
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