EPYC 7643 vs Xeon E3-1280 v5

Primary details

Comparing Xeon E3-1280 v5 and EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1186	39
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.88	6.72
Market segment	Server	Server
Series	Intel Xeon E3	AMD EPYC
Power efficiency	6.26	20.14
Architecture codename	Skylake-S (2015)	Milan (2021−2023)
Release date	19 October 2015 (9 years ago)	15 March 2021 (3 years ago)
Launch price (MSRP)	$612	$4,995

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7643 has 257% better value for money than Xeon E3-1280 v5.

Detailed specifications

Xeon E3-1280 v5 and EPYC 7643 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	4 (Quad-Core)	48 (Octatetraconta-Core)
Threads	8	96
Base clock speed	3.7 GHz	2.3 GHz
Boost clock speed	4 GHz	3.6 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	37	23
L1 cache	64K (per core)	64 KB (per core)
L2 cache	256K (per core)	512 KB (per core)
L3 cache	8 MB (shared)	256 MB (shared)
Chip lithography	14 nm	7 nm+
Die size	160 mm2	8x 81 mm2
Number of transistors	1,400 million	33,200 million
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Xeon E3-1280 v5 and EPYC 7643 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 (Uniprocessor)	2
Socket	FCLGA1151	SP3
Power consumption (TDP)	80 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1280 v5 and EPYC 7643. 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	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	-
Idle States	+	no data
Thermal Monitoring	+	-

Security technologies

Xeon E3-1280 v5 and EPYC 7643 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data
Secure Key	+	no data
MPX	+	-
SGX	Yes with both Intel® SPS and Intel® ME	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1280 v5 and EPYC 7643 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 E3-1280 v5 and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4	DDR4-3200
Maximum memory size	64 GB	4 TiB
Max memory channels	2	no data
Maximum memory bandwidth	34.134 GB/s	204.795 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Graphics image quality

Maximum display resolutions supported by Xeon E3-1280 v5 and EPYC 7643 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	N/A	no data
Max resolution over eDP	N/A	no data
Max resolution over DisplayPort	N/A	no data
Max resolution over VGA	N/A	no data

Graphics API support

APIs supported by Xeon E3-1280 v5 and EPYC 7643 integrated GPUs, sometimes API versions are included.

DirectX	N/A	no data
OpenGL	N/A	no data

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1280 v5 and EPYC 7643.

PCIe version	3.0	4.0
PCI Express lanes	16	128

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	5.29	47.88
Recency	19 October 2015	15 March 2021
Physical cores	4	48
Threads	8	96
Chip lithography	14 nm	7 nm
Power consumption (TDP)	80 Watt	225 Watt

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Should you still have questions on choice between Xeon E3-1280 v5 and EPYC 7643, ask them in Comments section, and we shall answer.

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