i9-11900KF vs Pentium 1405

Primary details

Comparing Pentium 1405 and Core i9-11900KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	423
Place by popularity	not in top-100	not in top-100
Market segment	Server	Desktop processor
Power efficiency	no data	11.91
Architecture codename	no data	Rocket Lake (2021)
Release date	1 April 2012 (12 years ago)	16 March 2021 (3 years ago)

Detailed specifications

Pentium 1405 and Core i9-11900KF 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	2 (Dual-core)	8 (Octa-Core)
Threads	2	16
Base clock speed	1.2 GHz	3.5 GHz
Boost clock speed	1.8 GHz	5.2 GHz
Bus rate	0 GT/s	8 GT/s
L1 cache	no data	64K (per core)
L2 cache	no data	256K (per core)
L3 cache	5 MB Intel® Smart Cache	16 MB (shared)
Chip lithography	32 nm	14 nm
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	no data	72 °C
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Pentium 1405 and Core i9-11900KF 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	FCLGA1356	FCLGA1200
Power consumption (TDP)	40 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium 1405 and Core i9-11900KF. You'll probably need this information if you require some particular technology.

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

Security technologies

Pentium 1405 and Core i9-11900KF 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 Pentium 1405 and Core i9-11900KF are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium 1405 and Core i9-11900KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3-800, DDR3-1066	DDR4-3200
Maximum memory size	375 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	25 GB/s	50 GB/s
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Pentium 1405 and Core i9-11900KF.

PCIe version	3.0	4.0
PCI Express lanes	24	20

Pros & cons summary

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Recency	1 April 2012	16 March 2021
Physical cores	2	8
Threads	2	16
Chip lithography	32 nm	14 nm
Power consumption (TDP)	40 Watt	125 Watt

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Should you still have questions on choice between Pentium 1405 and Core i9-11900KF, ask them in Comments section, and we shall answer.

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