Core i5-520E vs Core i7-5820K

Primary details

Comparing Core i7-5820K and Core i5-520E processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1001	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.16	no data
Market segment	Desktop processor	Laptop
Series	no data	Intel Core i5
Architecture codename	Haswell-E (2014)	Westmere (2010−2011)
Release date	1 September 2014 (9 years ago)	7 January 2010 (14 years ago)
Launch price (MSRP)	$410	$210
Current price	$247 (0.6x MSRP)	$2235 (10.6x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-5820K and Core i5-520E 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)	2 (Dual-core)
Threads	12	4
Base clock speed	3.3 GHz	no data
Boost clock speed	3.6 GHz	2.4 GHz
Bus support	no data	1 × 2.5 GT/s
L1 cache	64 KB (per core)	128 KB
L2 cache	256 KB (per core)	512 KB
L3 cache	15 MB (shared)	3 MB
Chip lithography	22 nm	32 nm
Die size	356 mm2	81 mm2
Maximum core temperature	67 °C	no data
Number of transistors	2,600 million	382 Million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	Yes	No

Compatibility

Information on Core i7-5820K and Core i5-520E 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	1	1 (Uniprocessor)
Socket	FCLGA2011	no data
Power consumption (TDP)	140 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-5820K and Core i5-520E. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX2	no data
AES-NI	+	+
FMA	no data	+
AVX	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	no data
Idle States	+	no data
Thermal Monitoring	+	no data
Smart Response	+	no data
Demand Based Switching	-	no data
Status	Discontinued	no data

Security technologies

Core i7-5820K and Core i5-520E technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	no data
Identity Protection	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-5820K and Core i5-520E are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-5820K and Core i5-520E. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR3-1066
Maximum memory size	64 GB	8 GB
Max memory channels	4	2
Maximum memory bandwidth	68 GB/s	17.051 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

Intel HD Graphics

Peripherals

Specifications and connection of peripherals supported by Core i7-5820K and Core i5-520E.

PCIe version	3.0	2.0
PCI Express lanes	28	16

Pros & cons summary

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Recency	1 September 2014	7 January 2010
Physical cores	6	2
Threads	12	4
Cost	$410	$210
Chip lithography	22 nm	32 nm
Power consumption (TDP)	140 Watt	35 Watt

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Should you still have questions on choice between Core i7-5820K and Core i5-520E, ask them in Comments section, and we shall answer.

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