Xeon E-2478 vs Phi 7255

Primary details

Comparing Xeon Phi 7255 and Xeon E-2478 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	314
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	82.64
Market segment	Server	Server
Power efficiency	no data	22.22
Architecture codename	no data	Raptor Lake-S (2023−2024)
Release date	1 October 2017 (7 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	no data	$568

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon Phi 7255 and Xeon E-2478 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	68 (Octahexaconta-Core)	8 (Octa-Core)
Threads	68	16
Base clock speed	1.1 GHz	2.8 GHz
Boost clock speed	1.2 GHz	5.2 GHz
Bus rate	no data	16 GT/s
L1 cache	no data	80 KB (per core)
L2 cache	no data	2 MB (per core)
L3 cache	34 MB L2 Cache	24 MB (shared)
Chip lithography	14 nm	Intel 7 nm
Die size	no data	257 mm2
Maximum core temperature	82 °C	100 °C
64 bit support	+	+
Windows 11 compatibility	-	no data
VID voltage range	0.550-1.2V	no data

Compatibility

Information on Xeon Phi 7255 and Xeon E-2478 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	1
Socket	no data	FCLGA1700
Power consumption (TDP)	215 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon Phi 7255 and Xeon E-2478. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX-512	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	-	+
Enhanced SpeedStep (EIST)	no data	+
Turbo Boost Technology	2.0	2
Hyper-Threading Technology	no data	+
Idle States	+	+
Thermal Monitoring	+	+
Turbo Boost Max 3.0	no data	+

Security technologies

Xeon Phi 7255 and Xeon E-2478 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+
Secure Key	no data	+
SGX	-	no data
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon Phi 7255 and Xeon E-2478 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon Phi 7255 and Xeon E-2478. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2400	DDR5-4800
Maximum memory size	384 GB	128 GB
Max memory channels	6	2
Maximum memory bandwidth	115.2 GB/s	no data
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Xeon Phi 7255 and Xeon E-2478.

PCIe version	3.0	5
PCI Express lanes	36	16

Pros & cons summary

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Recency	1 October 2017	14 December 2023
Physical cores	68	8
Threads	68	16
Power consumption (TDP)	215 Watt	80 Watt

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Should you still have questions on choice between Xeon Phi 7255 and Xeon E-2478, ask them in Comments section, and we shall answer.

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