Ryzen 9 3900XT vs EPYC 9455P
Aggregate performance score
EPYC 9455P outperforms Ryzen 9 3900XT by a whopping 260% 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 | 23 | 399 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 11.73 | 21.42 |
| Market segment | Server | Desktop processor |
| Series | no data | AMD Ryzen 9 |
| Power efficiency | 9.40 | 7.46 |
| Designer | AMD | AMD |
| Manufacturer | TSMC | TSMC |
| Architecture codename | Turin (2024) | Matisse 2 (2020) |
| Release date | 10 October 2024 (1 year ago) | 7 July 2020 (5 years ago) |
| Launch price (MSRP) | $4,819 | $499 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Ryzen 9 3900XT has 83% better value for money than EPYC 9455P.
Performance to price scatter graph
Currently popular graphics cards are shown for comparison.
Detailed specifications
Basic parameters of EPYC 9455P and Ryzen 9 3900XT: 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 | 48 (Octatetraconta-Core) | 12 (Dodeca-Core) |
| Threads | 96 | 24 |
| Base clock speed | 3.15 GHz | 3.8 GHz |
| Boost clock speed | 4.4 GHz | 4.7 GHz |
| L1 cache | 80 KB (per core) | 96K (per core) |
| L2 cache | 1 MB (per core) | 512K (per core) |
| L3 cache | 256 MB (shared) | 64 MB |
| Chip lithography | 4 nm | 7 nm, 12 nm |
| Die size | 8x 70.6 mm2 | 74 mm2 |
| Maximum case temperature (TCase) | no data | 95 °C |
| Number of transistors | 66,520 million | 3,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | + |
| Unlocked multiplier | - | + |
Compatibility
Information on EPYC 9455P and Ryzen 9 3900XT 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 | SP5 | AM4 |
| Power consumption (TDP) | 300 Watt | 105 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 9455P and Ryzen 9 3900XT. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| Precision Boost 2 | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 9455P and Ryzen 9 3900XT are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 9455P and Ryzen 9 3900XT. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR4-3200 |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 51.196 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | - |
Peripherals
Specifications and connection of peripherals supported by EPYC 9455P and Ryzen 9 3900XT.
| PCIe version | 5.0 | 4.0 |
| PCI Express lanes | 128 | no data |
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.
Pros & cons summary
| Performance score | 66.80 | 18.57 |
| Recency | 10 October 2024 | 7 July 2020 |
| Physical cores | 48 | 12 |
| Threads | 96 | 24 |
| Chip lithography | 4 nm | 7 nm |
| Power consumption (TDP) | 300 Watt | 105 Watt |
EPYC 9455P has a 260% higher aggregate performance score, an age advantage of 4 years, 300% more physical cores and 300% more threads, and a 75% more advanced lithography process.
Ryzen 9 3900XT, on the other hand, has 186% lower power consumption.
The AMD EPYC 9455P is our recommended choice as it beats the AMD Ryzen 9 3900XT in performance tests.
Be aware that EPYC 9455P is a server/workstation processor while Ryzen 9 3900XT is a desktop one.
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