Xeon L5638 vs E5-2640

Primary details

Comparing Xeon E5-2640 and Xeon L5638 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1427	1790
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.66	1.73
Market segment	Server	Server
Power efficiency	3.94	3.68
Architecture codename	Sandy Bridge-EP (2012)	Westmere-EP (2010−2011)
Release date	6 March 2012 (12 years ago)	16 March 2010 (14 years ago)
Launch price (MSRP)	$162	$90

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E5-2640 has 112% better value for money than Xeon L5638.

Detailed specifications

Xeon E5-2640 and Xeon L5638 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)	6 (Hexa-Core)
Threads	12	12
Base clock speed	2.5 GHz	2 GHz
Boost clock speed	3 GHz	2.4 GHz
Bus rate	7.2 GT/s	no data
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	15360 KB (shared)	12 MB (shared)
Chip lithography	32 nm	32 nm
Die size	435 mm2	239 mm2
Maximum core temperature	73 °C	85 °C
Number of transistors	2,270 million	1,170 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-2640 and Xeon L5638 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	FCLGA1366,LGA1366
Power consumption (TDP)	95 Watt	60 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2640 and Xeon L5638. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX	no data
AES-NI	+	+
AVX	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	1.0
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	+	-
Flex Memory Access	-	no data
Demand Based Switching	+	no data

Security technologies

Xeon E5-2640 and Xeon L5638 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 E5-2640 and Xeon L5638 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2640 and Xeon L5638. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	384 GB	no data
Max memory channels	4	no data
Maximum memory bandwidth	42.6 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2640 and Xeon L5638.

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	3.96	2.33
Recency	6 March 2012	16 March 2010
Power consumption (TDP)	95 Watt	60 Watt

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Should you still have questions on choice between Xeon E5-2640 and Xeon L5638, ask them in Comments section, and we shall answer.

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