EPYC 9255 vs Xeon E-2478

Primary details

Comparing Xeon E-2478 and EPYC 9255 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	320	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	82.67	no data
Market segment	Server	Server
Power efficiency	22.22	no data
Architecture codename	Raptor Lake-S (2023−2024)	Turin (2024)
Release date	14 December 2023 (1 year ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$568	$2,495

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E-2478 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	8 (Octa-Core)	24 (Tetracosa-Core)
Performance-cores	8	no data
Threads	16	48
Base clock speed	2.8 GHz	3.25 GHz
Boost clock speed	5.2 GHz	4.8 GHz
Bus rate	16 GT/s	no data
L1 cache	80 KB (per core)	80 KB (per core)
L2 cache	2 MB (per core)	1 MB (per core)
L3 cache	24 MB (shared)	128 MB (shared)
Chip lithography	Intel 7 nm	4 nm
Die size	257 mm2	4x 70.6 mm2
Maximum core temperature	100 °C	no data
Number of transistors	no data	33,260 million
64 bit support	+	+

Compatibility

Information on Xeon E-2478 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	2
Socket	FCLGA1700	SP5
Power consumption (TDP)	80 Watt	200 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E-2478 and EPYC 9255. 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	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Turbo Boost Max 3.0	+	no data
Precision Boost 2	no data	+

Security technologies

Xeon E-2478 and EPYC 9255 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 Xeon E-2478 and EPYC 9255 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 Xeon E-2478 and EPYC 9255. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5-4800	DDR5
Maximum memory size	128 GB	no data
Max memory channels	2	no data
ECC memory support	+	-

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 E-2478 and EPYC 9255.

PCIe version	5	5.0
PCI Express lanes	16	128

Pros & cons summary

---

Recency	14 December 2023	10 October 2024
Physical cores	8	24
Threads	16	48
Power consumption (TDP)	80 Watt	200 Watt

---

Should you still have questions on choice between Xeon E-2478 and EPYC 9255, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---