EPYC 9355 vs i7-1255U
Primary details
Comparing Core i7-1255U and EPYC 9355 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 875 | not rated |
| Place by popularity | 45 | not in top-100 |
| Market segment | Laptop | Server |
| Series | Intel Alder Lake-M | no data |
| Power efficiency | 53.92 | no data |
| Architecture codename | Alder Lake-U (2022) | Turin (2024) |
| Release date | 23 February 2022 (2 years ago) | 10 October 2024 (recently) |
| Launch price (MSRP) | no data | $3,694 |
Detailed specifications
Core i7-1255U 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 | 10 (Deca-Core) | 32 (Dotriaconta-Core) |
| Threads | 12 | 64 |
| Base clock speed | 1.7 GHz | 3.55 GHz |
| Boost clock speed | 4.7 GHz | 4.4 GHz |
| L1 cache | 80K (per core) | 80 KB (per core) |
| L2 cache | 1.25 MB (per core) | 1 MB (per core) |
| L3 cache | 12 MB (shared) | 256 MB (shared) |
| Chip lithography | Intel 7 nm | 4 nm |
| Die size | no data | 8x 70.6 mm2 |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | no data | 66,520 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
Compatibility
Information on Core i7-1255U 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 | 1 | 2 |
| Socket | FCBGA1744 | SP5 |
| Power consumption (TDP) | 15 Watt | 280 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-1255U and EPYC 9355. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | no data |
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Speed Shift | + | no data |
| Hyper-Threading Technology | + | no data |
| TSX | + | - |
| Thermal Monitoring | + | - |
| Flex Memory Access | + | no data |
| Precision Boost 2 | no data | + |
| Deep Learning Boost | + | - |
Security technologies
Core i7-1255U and EPYC 9355 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
| Secure Key | + | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-1255U and EPYC 9355 are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-1255U and EPYC 9355. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4, DDR5 | DDR5 |
| Maximum memory size | 64 GB | no data |
| Max memory channels | 2 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel® Iris® Xe Graphics eligible | N/A |
| Quick Sync Video | + | - |
| Graphics max frequency | 1.25 GHz | no data |
| Execution Units | 96 | no data |
Graphics interfaces
Available interfaces and connections of Core i7-1255U and EPYC 9355 integrated GPUs.
| Number of displays supported | 4 | no data |
Graphics image quality
Maximum display resolutions supported by Core i7-1255U and EPYC 9355 integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | 4096 x 2304 @ 60Hz | no data |
| Max resolution over eDP | 4096 x 2304 @ 120Hz | no data |
| Max resolution over DisplayPort | 7680 x 4320 @ 60Hz | no data |
Graphics API support
APIs supported by Core i7-1255U and EPYC 9355 integrated GPUs, sometimes API versions are included.
| DirectX | 12.1 | no data |
| OpenGL | 4.6 | no data |
Peripherals
Specifications and connection of peripherals supported by Core i7-1255U and EPYC 9355.
| PCIe version | 4.0 | 5.0 |
| PCI Express lanes | 20 | 128 |
Pros & cons summary
| Recency | 23 February 2022 | 10 October 2024 |
| Physical cores | 10 | 32 |
| Threads | 12 | 64 |
| Power consumption (TDP) | 15 Watt | 280 Watt |
i7-1255U has 1766.7% lower power consumption.
EPYC 9355, on the other hand, has an age advantage of 2 years, and 220% more physical cores and 433.3% more threads.
We couldn't decide between Core i7-1255U and EPYC 9355. We've got no test results to judge.
Be aware that Core i7-1255U is a notebook processor while EPYC 9355 is a server/workstation one.
Should you still have questions on choice between Core i7-1255U and EPYC 9355, ask them in Comments section, and we shall answer.
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