EPYC 9255 vs i5-8420
Primary details
Comparing Core i5-8420 and EPYC 9255 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 | Desktop processor | Server |
| Series | Intel Core i5 | no data |
| Architecture codename | Coffee Lake (2017−2019) | Turin (2024) |
| Release date | 1 September 2018 (6 years ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $2,495 |
Detailed specifications
Core i5-8420 and EPYC 9255 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 | 6 (Hexa-Core) | 24 (Tetracosa-Core) |
| Threads | 6 | 48 |
| Base clock speed | 2.9 GHz | 3.25 GHz |
| Boost clock speed | 4.1 GHz | 4.8 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | no data |
| L1 cache | 64K (per core) | 80 KB (per core) |
| L2 cache | 256K (per core) | 1 MB (per core) |
| L3 cache | 9 MB (shared) | 128 MB (shared) |
| Chip lithography | 14 nm | 4 nm |
| Die size | 126 mm2 | 4x 70.6 mm2 |
| Maximum case temperature (TCase) | 72 °C | no data |
| Number of transistors | no data | 33,260 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Core i5-8420 and EPYC 9255 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 (Uniprocessor) | 2 |
| Socket | 1151 | SP5 |
| Power consumption (TDP) | 65 Watt | 200 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i5-8420 and EPYC 9255. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i5-8420 and EPYC 9255 are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i5-8420 and EPYC 9255. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Dual-channel | DDR5 |
| Maximum memory size | 64 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 42.671 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel UHD Graphics 630 | N/A |
Peripherals
Specifications and connection of peripherals supported by Core i5-8420 and EPYC 9255.
| PCIe version | 3.0 | 5.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Recency | 1 September 2018 | 10 October 2024 |
| Physical cores | 6 | 24 |
| Threads | 6 | 48 |
| Chip lithography | 14 nm | 4 nm |
| Power consumption (TDP) | 65 Watt | 200 Watt |
i5-8420 has 207.7% lower power consumption.
EPYC 9255, on the other hand, has an age advantage of 6 years, 300% more physical cores and 700% more threads, and a 250% more advanced lithography process.
We couldn't decide between Core i5-8420 and EPYC 9255. We've got no test results to judge.
Note that Core i5-8420 is a desktop processor while EPYC 9255 is a server/workstation one.
Should you still have questions on choice between Core i5-8420 and EPYC 9255, ask them in Comments section, and we shall answer.
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