Xeon E5-2666 V3 vs Gold 6142

Primary details

Comparing Xeon Gold 6142 and Xeon E5-2666 V3 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	427	866
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	4.25	no data
Market segment	Server	Server
Series	Intel Xeon Gold	no data
Power efficiency	9.96	6.23
Architecture codename	Skylake (server) (2017−2018)	Haswell-EP (2014−2015)
Release date	25 April 2017 (7 years ago)	13 November 2014 (10 years ago)
Launch price (MSRP)	$2,946	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon Gold 6142 and Xeon E5-2666 V3 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	16 (Hexadeca-Core)	10 (Deca-Core)
Threads	32	20
Base clock speed	2.6 GHz	2.9 GHz
Boost clock speed	3.7 GHz	3.5 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	26	no data
L1 cache	1 MB	64K (per core)
L2 cache	16 MB	256K (per core)
L3 cache	22 MB	25 MB (shared)
Chip lithography	14 nm	22 nm
Die size	no data	356 mm2
Maximum core temperature	85 °C	no data
Number of transistors	no data	2,600 million
64 bit support	+	+
Windows 11 compatibility	+	no data

Compatibility

Information on Xeon Gold 6142 and Xeon E5-2666 V3 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	4 (Multiprocessor)	2
Socket	FCLGA3647	2011-3
Power consumption (TDP)	150 Watt	135 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon Gold 6142 and Xeon E5-2666 V3. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512	no data
AES-NI	+	+
AVX	+	+
vPro	+	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	+
Turbo Boost Max 3.0	-	no data

Security technologies

Xeon Gold 6142 and Xeon E5-2666 V3 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon Gold 6142 and Xeon E5-2666 V3 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon Gold 6142 and Xeon E5-2666 V3. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR3, DDR4 2133 MHz Quad-channel
Maximum memory size	768 GB	no data
Max memory channels	6	no data
Maximum memory bandwidth	128.001 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Xeon Gold 6142 and Xeon E5-2666 V3.

PCIe version	3.0	3.0
PCI Express lanes	48	40

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	15.87	8.93
Recency	25 April 2017	13 November 2014
Physical cores	16	10
Threads	32	20
Chip lithography	14 nm	22 nm
Power consumption (TDP)	150 Watt	135 Watt

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Should you still have questions on choice between Xeon Gold 6142 and Xeon E5-2666 V3, ask them in Comments section, and we shall answer.

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