Xeon L5420 vs L5520

Primary details

Comparing Xeon L5520 and Xeon L5420 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	2057	2115
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	4.98	0.27
Market segment	Server	Server
Architecture codename	Gainestown (2009−2010)	no data
Release date	March 2009 (15 years ago)	1 January 2008 (16 years ago)
Launch price (MSRP)	$100	no data
Current price	$37 (0.4x MSRP)	$84

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon L5520 has 1744% better value for money than Xeon L5420.

Detailed specifications

Xeon L5520 and Xeon L5420 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)	no data
Threads	8	no data
Base clock speed	2.26 GHz	2.5 GHz
Boost clock speed	2.48 GHz	no data
L1 cache	64 KB (per core)	no data
L2 cache	256 KB (per core)	no data
L3 cache	8 MB (shared)	12 MB L2 Cache
Chip lithography	45 nm	45 nm
Die size	263 mm2	no data
Maximum core temperature	70 °C	57 °C
Number of transistors	731 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No
VID voltage range	no data	0.85V-1.35V

Compatibility

Information on Xeon L5520 and Xeon L5420 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	no data
Socket	FCLGA1366	LGA771
Power consumption (TDP)	60 Watt	50 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon L5520 and Xeon L5420. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	no data	+
Demand Based Switching	+	+
PAE	40 Bit	no data
FSB parity	no data	+
Status	Discontinued	Discontinued

Security technologies

Xeon L5520 and Xeon L5420 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon L5520 and Xeon L5420 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon L5520 and Xeon L5420. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	no data
Maximum memory size	144 GB	no data
Max memory channels	3	no data
Maximum memory bandwidth	25.6 GB/s	no data
ECC memory support	+	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.

L5520 outperforms L5420 by 7% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	1.47	1.38
Power consumption (TDP)	60 Watt	50 Watt

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Should you still have questions on choice between Xeon L5520 and Xeon L5420, ask them in Comments section, and we shall answer.

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