Xeon E5645 vs E5-2683 v4

Primary details

Comparing Xeon E5-2683 v4 and Xeon E5645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	712	1618
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.76	1.38
Market segment	Server	Server
Series	Intel Xeon E5	no data
Power efficiency	8.68	3.76
Architecture codename	Broadwell (2015−2019)	Westmere-EP (2010−2011)
Release date	20 June 2016 (8 years ago)	16 March 2010 (14 years ago)
Launch price (MSRP)	$1,846	$294

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E5-2683 v4 has 100% better value for money than Xeon E5645.

Detailed specifications

Xeon E5-2683 v4 and Xeon E5645 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)	6 (Hexa-Core)
Threads	32	12
Base clock speed	2.1 GHz	2.4 GHz
Boost clock speed	3 GHz	2.67 GHz
Bus type	QPI	no data
Bus rate	2 × 9.6 GT/s	no data
Multiplier	21	no data
L1 cache	no data	64 KB (per core)
L2 cache	4 MB	256 KB (per core)
L3 cache	40 MB	12 MB (shared)
Chip lithography	14 nm	32 nm
Die size	456.12 mm2	239 mm2
Maximum core temperature	84 °C	76 °C
Number of transistors	7200 Million	1,170 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-2683 v4 and Xeon E5645 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	FCLGA2011	FCLGA1366,LGA1366
Power consumption (TDP)	120 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2683 v4 and Xeon E5645. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® SSE4.2
AES-NI	+	+
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	1.0
Hyper-Threading Technology	+	+
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	-
Flex Memory Access	-	no data
Demand Based Switching	+	+
PAE	46 Bit	40 Bit

Security technologies

Xeon E5-2683 v4 and Xeon E5645 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2683 v4 and Xeon E5645 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2683 v4 and Xeon E5645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866, DDR4-2133, DDR4-2400	DDR3
Maximum memory size	1.5 TB	288 GB
Max memory channels	4	3
Maximum memory bandwidth	76.8 GB/s	32 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2683 v4 and Xeon E5645.

PCIe version	3.0	2.0
PCI Express lanes	40	no data

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	11.00	3.18
Recency	20 June 2016	16 March 2010
Physical cores	16	6
Threads	32	12
Chip lithography	14 nm	32 nm
Power consumption (TDP)	120 Watt	80 Watt

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Should you still have questions on choice between Xeon E5-2683 v4 and Xeon E5645, ask them in Comments section, and we shall answer.

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