Xeon L5520 vs L5640

Primary details

Comparing Xeon L5640 and Xeon L5520 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1546	2057
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.26	4.98
Market segment	Server	Server
Architecture codename	Westmere-EP (2010−2011)	Gainestown (2009−2010)
Release date	16 March 2010 (14 years ago)	March 2009 (15 years ago)
Launch price (MSRP)	$200	$100
Current price	$777 (3.9x MSRP)	$37 (0.4x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon L5520 has 1815% better value for money than Xeon L5640.

Detailed specifications

Xeon L5640 and Xeon L5520 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)	4 (Quad-Core)
Threads	12	8
Base clock speed	2.26 GHz	2.26 GHz
Boost clock speed	2.8 GHz	2.48 GHz
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	12 MB (shared)	8 MB (shared)
Chip lithography	32 nm	45 nm
Die size	239 mm2	263 mm2
Maximum core temperature	69 °C	70 °C
Number of transistors	1,170 million	731 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Xeon L5640 and Xeon L5520 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	FCLGA1366,LGA1366	FCLGA1366
Power consumption (TDP)	60 Watt	60 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon L5640 and Xeon L5520. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
AES-NI	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	1.0
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	-	no data
Demand Based Switching	+	+
PAE	40 Bit	40 Bit
Status	Discontinued	Discontinued

Security technologies

Xeon L5640 and Xeon L5520 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon L5640 and Xeon L5520 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon L5640 and Xeon L5520. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	288 GB	144 GB
Max memory channels	3	3
Maximum memory bandwidth	32 GB/s	25.6 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Xeon L5640 and Xeon L5520.

PCIe version

2.0

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.

L5640 outperforms L5520 by 103% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	2.98	1.47
Physical cores	6	4
Threads	12	8
Cost	$200	$100
Chip lithography	32 nm	45 nm

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Should you still have questions on choice between Xeon L5640 and Xeon L5520, ask them in Comments section, and we shall answer.

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