Core i5-8400B vs Core i7-3930K

Primary details

Comparing Core i7-3930K and Core i5-8400B processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1154	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.52	no data
Market segment	Desktop processor	Laptop
Series	no data	Intel Core i5
Architecture codename	Sandy Bridge-E (2011−2013)	Coffee Lake (2017−2019)
Release date	14 November 2011 (12 years ago)	2 April 2018 (6 years ago)
Launch price (MSRP)	$611	$182

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-3930K and Core i5-8400B 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	6
Base clock speed	3.2 GHz	no data
Boost clock speed	3.8 GHz	2.8 GHz
Bus support	no data	4 × 8 GT/s
L1 cache	64 KB (per core)	384 KB
L2 cache	256 KB (per core)	1.5 MB
L3 cache	12 MB (shared)	9 MB
Chip lithography	32 nm	14 nm
Die size	435 mm2	126 mm2
Maximum case temperature (TCase)	67 °C	no data
Number of transistors	2,270 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	Yes	No

Compatibility

Information on Core i7-3930K and Core i5-8400B 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	2011	no data
Power consumption (TDP)	130 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3930K and Core i5-8400B. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
Hyper-Threading Technology	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3930K and Core i5-8400B are enumerated here.

VT-d	+	+
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3930K and Core i5-8400B. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-2666
Maximum memory size	no data	64 GB
Max memory channels	no data	2
Maximum memory bandwidth	51.2 GB/s	42.671 GB/s
ECC memory support	-	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

Intel UHD Graphics 630

Peripherals

Specifications and connection of peripherals supported by Core i7-3930K and Core i5-8400B.

PCIe version	3.0	no data
PCI Express lanes	40	16

Pros & cons summary

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Recency	14 November 2011	2 April 2018
Threads	12	6
Chip lithography	32 nm	14 nm
Power consumption (TDP)	130 Watt	65 Watt

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Should you still have questions on choice between Core i7-3930K and Core i5-8400B, ask them in Comments section, and we shall answer.

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