i9-11900K vs Pentium Gold 6405U

Primary details

Comparing Pentium Gold 6405U and Core i9-11900K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2028	420
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	18.15
Market segment	Laptop	Desktop processor
Series	Intel Comet Lake	no data
Power efficiency	10.93	12.01
Architecture codename	Comet Lake-U (2019−2020)	Rocket Lake (2021)
Release date	31 October 2019 (5 years ago)	16 March 2021 (3 years ago)
Launch price (MSRP)	$161	$539

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium Gold 6405U and Core i9-11900K 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	4	16
Base clock speed	2.4 GHz	3.5 GHz
Boost clock speed	2.4 GHz	5.2 GHz
Bus rate	4 GT/s	8 GT/s
L1 cache	256 KB	80 KB (per core)
L2 cache	1 MB	512 KB (per core)
L3 cache	2 MB	16 MB (shared)
Chip lithography	14 nm	14 nm
Die size	no data	276 mm2
Maximum core temperature	100 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	-	+

Compatibility

Information on Pentium Gold 6405U and Core i9-11900K 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	FCBGA1528	FCLGA1200
Power consumption (TDP)	15 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium Gold 6405U and Core i9-11900K. You'll probably need this information if you require some particular technology.

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

Security technologies

Pentium Gold 6405U and Core i9-11900K technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+
Secure Key	+	+
Identity Protection	+	+
SGX	Yes with Intel® ME	-
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium Gold 6405U and Core i9-11900K are enumerated here.

AMD-V	+	-
VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium Gold 6405U and Core i9-11900K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR4
Maximum memory size	64 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	37.5 GB/s	50 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® UHD Graphics for 10th Gen Intel® Processors	Intel UHD Graphics 750
Max video memory	32 GB	64 GB
Quick Sync Video	+	+
Clear Video	+	+
Clear Video HD	+	+
Graphics max frequency	950 MHz	1.3 GHz
Execution Units	no data	32
InTru 3D	no data	+

Graphics interfaces

Available interfaces and connections of Pentium Gold 6405U and Core i9-11900K integrated GPUs.

Number of displays supported	3	3
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
DVI	+	no data

Graphics image quality

Maximum display resolutions supported by Pentium Gold 6405U and Core i9-11900K integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	+
Max resolution over HDMI 1.4	4096x2304@24Hz	4096x2160@60Hz
Max resolution over eDP	4096x2304@60Hz	5120 x 3200 @60Hz
Max resolution over DisplayPort	4096x2304@60Hz	5120 x 3200 @60Hz

Graphics API support

APIs supported by Pentium Gold 6405U and Core i9-11900K integrated GPUs, sometimes API versions are included.

DirectX	12	12.1
OpenGL	4.5	4.5

Peripherals

Specifications and connection of peripherals supported by Pentium Gold 6405U and Core i9-11900K.

PCIe version	2.0	4.0
PCI Express lanes	12	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	1.74	15.93
Recency	31 October 2019	16 March 2021
Physical cores	2	8
Threads	4	16
Power consumption (TDP)	15 Watt	125 Watt

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Should you still have questions on choice between Pentium Gold 6405U and Core i9-11900K, ask them in Comments section, and we shall answer.

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