EPYC 9355 vs Ryzen 9 7840HX
Primary details
Comparing Ryzen 9 7840HX and EPYC 9355 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Server |
| Series | AMD Dragon Range (Zen 4, Ryzen 7045) | no data |
| Architecture codename | Dragon Range-HX (Zen 4) (2023−2024) | Turin (2024) |
| Release date | 17 January 2024 (less than a year ago) | 10 October 2024 (recently) |
| Launch price (MSRP) | no data | $3,694 |
Detailed specifications
Ryzen 9 7840HX and EPYC 9355 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) | 32 (Dotriaconta-Core) |
| Threads | 24 | 64 |
| Base clock speed | 2.9 GHz | 3.55 GHz |
| Boost clock speed | 5.1 GHz | 4.4 GHz |
| L1 cache | 768 KB | 80 KB (per core) |
| L2 cache | 12 MB | 1 MB (per core) |
| L3 cache | 64 MB | 256 MB (shared) |
| Chip lithography | 5 nm | 4 nm |
| Die size | no data | 8x 70.6 mm2 |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | 9900 Million | 66,520 million |
| 64 bit support | + | + |
Compatibility
Information on Ryzen 9 7840HX and EPYC 9355 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 | no data | 2 |
| Socket | FL1 | SP5 |
| Power consumption (TDP) | 55 Watt | 280 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 7840HX and EPYC 9355. You'll probably need this information if you require some particular technology.
| Instruction set extensions | MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME | no data |
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 7840HX and EPYC 9355 are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7840HX and EPYC 9355. 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 610M | N/A |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 7840HX and EPYC 9355.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Recency | 17 January 2024 | 10 October 2024 |
| Physical cores | 12 | 32 |
| Threads | 24 | 64 |
| Chip lithography | 5 nm | 4 nm |
| Power consumption (TDP) | 55 Watt | 280 Watt |
Ryzen 9 7840HX has 409.1% lower power consumption.
EPYC 9355, on the other hand, has an age advantage of 8 months, 166.7% more physical cores and 166.7% more threads, and a 25% more advanced lithography process.
We couldn't decide between Ryzen 9 7840HX and EPYC 9355. We've got no test results to judge.
Be aware that Ryzen 9 7840HX is a notebook processor while EPYC 9355 is a server/workstation one.
Should you still have questions on choice between Ryzen 9 7840HX and EPYC 9355, ask them in Comments section, and we shall answer.
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