Xeon 6766E vs EPYC 7551

Primary details

Comparing EPYC 7551 and Xeon 6766E processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	437	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.26	no data
Market segment	Server	Server
Series	AMD EPYC	no data
Architecture codename	Naples (2017−2018)	Sierra Forest (2024)
Release date	20 June 2017 (7 years ago)	3 June 2024 (less than a year ago)
Launch price (MSRP)	$3,400	$10,257

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7551 and Xeon 6766E 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	32 (Dotriaconta-Core)	144
Threads	64	144
Base clock speed	2 GHz	1.9 GHz
Boost clock speed	2 GHz	2.7 GHz
Multiplier	20	no data
L1 cache	3 MB	96 KB (per core)
L2 cache	16 MB	4 MB (per module)
L3 cache	64 MB (shared)	108 MB (shared)
Chip lithography	14 nm	5 nm
Die size	213 mm2	no data
Maximum case temperature (TCase)	no data	84 °C
Number of transistors	19200 Million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	+	-

Compatibility

Information on EPYC 7551 and Xeon 6766E 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 (Multiprocessor)	2
Socket	TR4	4710
Power consumption (TDP)	180 Watt	250 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7551 and Xeon 6766E. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	no data	+
TSX	-	+

Security technologies

EPYC 7551 and Xeon 6766E technologies aimed at improving security, for example, by protecting against hacks.

TXT

no data

+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7551 and Xeon 6766E 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 EPYC 7551 and Xeon 6766E. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR5
Maximum memory size	2 TiB	no data
Max memory channels	8	no data
Maximum memory bandwidth	170.671 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 EPYC 7551 and Xeon 6766E.

PCIe version	3.0	5.0
PCI Express lanes	128	88

Pros & cons summary

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Recency	20 June 2017	3 June 2024
Physical cores	32	144
Threads	64	144
Chip lithography	14 nm	5 nm
Power consumption (TDP)	180 Watt	250 Watt

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