EPYC 9255 vs Xeon E5-2643 v3

Primary details

Comparing Xeon E5-2643 v3 and EPYC 9255 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1036	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Server	Server
Power efficiency	4.61	no data
Architecture codename	Haswell-EP (2014−2015)	Turin (2024)
Release date	8 September 2014 (10 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	no data	$2,495

Detailed specifications

Xeon E5-2643 v3 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	12	48
Base clock speed	3.4 GHz	3.25 GHz
Boost clock speed	3.7 GHz	4.8 GHz
Bus rate	9.6 GT/s	no data
L1 cache	64K (per core)	80 KB (per core)
L2 cache	256K (per core)	1 MB (per core)
L3 cache	20 MB (shared)	128 MB (shared)
Chip lithography	22 nm	4 nm
Die size	356 mm2	4x 70.6 mm2
Maximum core temperature	77 °C	no data
Number of transistors	2,600 million	33,260 million
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Xeon E5-2643 v3 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	FCLGA2011	SP5
Power consumption (TDP)	135 Watt	200 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2643 v3 and EPYC 9255. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	no data
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Flex Memory Access	-	no data
Demand Based Switching	+	no data
PAE	46 Bit	no data
Precision Boost 2	no data	+

Security technologies

Xeon E5-2643 v3 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 E5-2643 v3 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 E5-2643 v3 and EPYC 9255. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866, DDR4-2133	DDR5
Maximum memory size	768 GB	no data
Max memory channels	4	no data
Maximum memory bandwidth	68 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 E5-2643 v3 and EPYC 9255.

PCIe version	3.0	5.0
PCI Express lanes	40	128

Pros & cons summary

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Recency	8 September 2014	10 October 2024
Physical cores	6	24
Threads	12	48
Chip lithography	22 nm	4 nm
Power consumption (TDP)	135 Watt	200 Watt

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