i5-11400F vs i7-875K

Primary details

Comparing Core i7-875K and Core i5-11400F processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1943	723
Place by popularity	not in top-100	38
Cost-effectiveness evaluation	0.07	37.58
Market segment	Desktop processor	Desktop processor
Power efficiency	1.94	15.59
Architecture codename	Lynnfield (2009−2010)	Rocket Lake (2021)
Release date	30 May 2010 (14 years ago)	16 March 2021 (3 years ago)
Launch price (MSRP)	$486	$157

Cost-effectiveness evaluation

Performance per price, higher is better.

i5-11400F has 53586% better value for money than i7-875K.

Detailed specifications

Core i7-875K and Core i5-11400F 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)	6 (Hexa-Core)
Threads	8	12
Base clock speed	2.93 GHz	2.6 GHz
Boost clock speed	3.6 GHz	4.4 GHz
Bus rate	2.5 GT/s	8 GT/s
L1 cache	64 KB (per core)	64K (per core)
L2 cache	256 KB (per core)	256K (per core)
L3 cache	8 MB (shared)	12 MB (shared)
Chip lithography	45 nm	14 nm
Die size	296 mm2	276 mm2
Maximum core temperature	73 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	774 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	+	-

Compatibility

Information on Core i7-875K and Core i5-11400F 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
Socket	FCLGA1156,LGA1156	FCLGA1200
Power consumption (TDP)	95 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-875K and Core i5-11400F. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	-	+
FMA	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	2.0
Hyper-Threading Technology	+	+
TSX	-	+
Idle States	+	+
Thermal Monitoring	-	+
Demand Based Switching	-	no data
PAE	36 Bit	no data
Turbo Boost Max 3.0	no data	-
Deep Learning Boost	-	+

Security technologies

Core i7-875K and Core i5-11400F technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	no data	+
Identity Protection	-	+
SGX	no data	-
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-875K and Core i5-11400F are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-875K and Core i5-11400F. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4
Maximum memory size	16 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	21 GB/s	50 GB/s

Peripherals

Specifications and connection of peripherals supported by Core i7-875K and Core i5-11400F.

PCIe version	2.0	4.0
PCI Express lanes	16	20

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.

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Pros & cons summary

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Performance score	1.95	10.71
Recency	30 May 2010	16 March 2021
Physical cores	4	6
Threads	8	12
Chip lithography	45 nm	14 nm
Power consumption (TDP)	95 Watt	65 Watt

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Should you still have questions on choice between Core i7-875K and Core i5-11400F, ask them in Comments section, and we shall answer.

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