Core i9-11900KB vs Ryzen 7 3800X

General info

Comparing Ryzen 7 3800X and Core i9-11900KB processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	412	423
Place by popularity	not in top-100	not in top-100
Value for money	30.55	no data
Market segment	Desktop processor	Desktop processor
Series	AMD Ryzen 7	no data
Architecture codename	Matisse (2019−2020)	Tiger Lake-H (2021)
Release date	7 July 2019 (4 years old)	May 2021 (2 years old)
Launch price (MSRP)	$399	$539
Current price	$298 (0.7x MSRP)	no data

Value for money

Performance per price, higher is better.

Technical specs

Ryzen 7 3800X and Core i9-11900KB 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	8 (Octa-Core)	8 (Octa-Core)
Threads	16	16
Base clock speed	3.9 GHz	3.3 GHz
Boost clock speed	4.5 GHz	4.9 GHz
L1 cache	96K (per core)	80K (per core)
L2 cache	512K (per core)	1.25 MB (per core)
L3 cache	32 MB	24 MB (shared)
Chip lithography	7 nm, 12 nm	10 nm SuperFin
Die size	no data	190 mm2
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	19,200 million	no data
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	Yes	Yes

Compatibility

Information on Ryzen 7 3800X and Core i9-11900KB 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 (Uniprocessor)	1
Socket	AM4	FCBGA1787
Power consumption (TDP)	105 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 7 3800X and Core i9-11900KB. You'll probably need this information if you require some particular technology.

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

Security technologies

Ryzen 7 3800X and Core i9-11900KB technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	no data	+
Secure Key	no data	+
Identity Protection	no data	+
SGX	no data	Yes with Intel® ME
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 7 3800X and Core i9-11900KB are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 7 3800X and Core i9-11900KB. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Dual-channel	DDR4
Maximum memory size	128 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	51.196 GB/s	51.2 GB/s
ECC memory support	-	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	-	Intel® UHD Graphics for 11th Gen Intel® Processors
Quick Sync Video	-	+
Graphics max frequency	-	1.45 GHz
Execution Units	-	32

Graphics interfaces

Available interfaces and connections of Ryzen 7 3800X and Core i9-11900KB integrated GPUs.

Number of displays supported

-

4

Graphics image quality

Maximum display resolutions supported by Ryzen 7 3800X and Core i9-11900KB integrated GPUs, including resolutions over different interfaces.

4K resolution support	-	+
Max resolution over HDMI 1.4	-	4096x2304@60Hz
Max resolution over eDP	-	4096 x 2304@60Hz
Max resolution over DisplayPort	-	7680x4320@60Hz

Graphics API support

APIs supported by Ryzen 7 3800X and Core i9-11900KB integrated GPUs, sometimes API versions are included.

DirectX	-	12
OpenGL	-	4.6

Peripherals

Specifications and connection of peripherals supported by Ryzen 7 3800X and Core i9-11900KB.

PCIe version	no data	4.0
PCI Express lanes	no data	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.

Ryzen 7 3800X outperforms Core i9-11900KB by 1% based on our aggregated benchmark results.

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Advantages and disadvantages

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Performance score	15.13	14.95
Cost	$399	$539
Chip lithography	7 nm	10 nm
Power consumption (TDP)	105 Watt	65 Watt

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Should you still have questions on choice between Ryzen 7 3800X and Core i9-11900KB, ask them in Comments section, and we shall answer.

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