EPYC 9255 vs Xeon 6766E
Primary details
Comparing Xeon 6766E 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 | Server | Server |
| Architecture codename | Sierra Forest (2024) | Turin (2024) |
| Release date | 3 June 2024 (less than a year ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | $10,257 | $2,495 |
Detailed specifications
Xeon 6766E 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 | 144 | 24 (Tetracosa-Core) |
| Threads | 144 | 48 |
| Base clock speed | 1.9 GHz | 3.25 GHz |
| Boost clock speed | 2.7 GHz | 4.8 GHz |
| L1 cache | 96 KB (per core) | 80 KB (per core) |
| L2 cache | 4 MB (per module) | 1 MB (per core) |
| L3 cache | 108 MB (shared) | 128 MB (shared) |
| Chip lithography | 5 nm | 4 nm |
| Die size | no data | 4x 70.6 mm2 |
| Maximum case temperature (TCase) | 84 °C | no data |
| Number of transistors | no data | 33,260 million |
| 64 bit support | + | + |
Compatibility
Information on Xeon 6766E 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 | 2 | 2 |
| Socket | 4710 | SP5 |
| Power consumption (TDP) | 250 Watt | 200 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon 6766E and EPYC 9255. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | no data |
| TSX | + | - |
| Precision Boost 2 | no data | + |
Security technologies
Xeon 6766E and EPYC 9255 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon 6766E 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 Xeon 6766E and EPYC 9255. 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 | N/A | N/A |
Peripherals
Specifications and connection of peripherals supported by Xeon 6766E and EPYC 9255.
| PCIe version | 5.0 | 5.0 |
| PCI Express lanes | 88 | 128 |
Pros & cons summary
| Recency | 3 June 2024 | 10 October 2024 |
| Physical cores | 144 | 24 |
| Threads | 144 | 48 |
| Chip lithography | 5 nm | 4 nm |
| Power consumption (TDP) | 250 Watt | 200 Watt |
Xeon 6766E has 500% more physical cores and 200% more threads.
EPYC 9255, on the other hand, has an age advantage of 4 months, a 25% more advanced lithography process, and 25% lower power consumption.
We couldn't decide between Xeon 6766E and EPYC 9255. We've got no test results to judge.
Should you still have questions on choice between Xeon 6766E and EPYC 9255, ask them in Comments section, and we shall answer.
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