Core i7-840QM vs Xeon E5520

Primary details

Comparing Xeon E5520 and Core i7-840QM processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1997	2209
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.58	no data
Market segment	Server	Laptop
Series	no data	Intel Core i7
Architecture codename	Gainestown (2009−2010)	Clarksfield (2009−2010)
Release date	March 2009 (15 years ago)	20 June 2010 (14 years ago)
Launch price (MSRP)	$19	$568
Current price	$81 (4.3x MSRP)	$191 (0.3x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5520 and Core i7-840QM 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)	4 (Quad-Core)
Threads	8	8
Base clock speed	2.26 GHz	1.86 GHz
Boost clock speed	2.53 GHz	3.2 GHz
Bus support	no data	2500 MHz
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	8 MB (shared)	8 MB (shared)
Chip lithography	45 nm	45 nm
Die size	263 mm2	296 mm2
Maximum core temperature	72 °C	100 °C
Number of transistors	731 million	774 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Xeon E5520 and Core i7-840QM 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	1
Socket	FCLGA1366	FCPGA988,PGA988
Power consumption (TDP)	80 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5520 and Core i7-840QM. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.2
AES-NI	no data	-
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	+
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	no data	+
Demand Based Switching	+	no data
PAE	40 Bit	36 Bit
Status	Discontinued	Discontinued

Security technologies

Xeon E5520 and Core i7-840QM technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5520 and Core i7-840QM are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5520 and Core i7-840QM. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	144 GB	8 GB
Max memory channels	3	2
Maximum memory bandwidth	25.6 GB/s	21 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

None

Peripherals

Specifications and connection of peripherals supported by Xeon E5520 and Core i7-840QM.

PCIe version	no data	2
PCI Express lanes	no data	16

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.

Xeon E5520 outperforms Core i7-840QM by 29% based on our aggregate benchmark results.

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Pros & cons summary

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Performance score	1.63	1.26
Cost	$19	$568
Power consumption (TDP)	80 Watt	45 Watt

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Should you still have questions on choice between Xeon E5520 and Core i7-840QM, ask them in Comments section, and we shall answer.

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