Intel Core i9-11900KB vs AMD Ryzen 9 3900XT

Comparative analysis of Intel Core i9-11900KB and AMD Ryzen 9 3900XT processors for all known characteristics in the following categories: Essentials, Performance, Memory, Graphics, Graphics interfaces, Graphics image quality, Graphics API support, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, 3DMark Fire Strike - Physics Score.

Intel Core i9-11900KB

AMD Ryzen 9 3900XT

Differences

Reasons to consider the Intel Core i9-11900KB

Around 4% higher clock speed: 4.90 GHz vs 4.7 GHz
Around 67% more L2 cache; more data can be stored in the L2 cache for quick access later
Around 62% lower typical power consumption: 65 Watt vs 105 Watt
Around 21% better performance in PassMark - Single thread mark: 3310 vs 2746

Specifications (specs)
Maximum frequency	4.90 GHz vs 4.7 GHz
L2 cache	10 MB vs 6 MB
Thermal Design Power (TDP)	65 Watt vs 105 Watt
Benchmarks
PassMark - Single thread mark	3310 vs 2746

Reasons to consider the AMD Ryzen 9 3900XT

Processor is unlocked, an unlocked multiplier allows for easier overclocking
4 more cores, run more applications at once: 12 vs 8
8 more threads: 24 vs 16
A newer manufacturing process allows for a more powerful, yet cooler running processor: 7 nm vs 10 nm SuperFin
2.7x more L3 cache, more data can be stored in the L3 cache for quick access later
Around 43% better performance in PassMark - CPU mark: 32662 vs 22911
Around 11% better performance in 3DMark Fire Strike - Physics Score: 8546 vs 7681

Specifications (specs)
Unlocked	Unlocked vs Locked
Number of cores	12 vs 8
Number of threads	24 vs 16
Manufacturing process technology	7 nm vs 10 nm SuperFin
L3 cache	64 MB vs 24 MB
Benchmarks
PassMark - CPU mark	32662 vs 22911
3DMark Fire Strike - Physics Score	8546 vs 7681

Compare benchmarks

CPU 1: Intel Core i9-11900KB
CPU 2: AMD Ryzen 9 3900XT

PassMark - Single thread mark

CPU 1

CPU 2

3310

2746

PassMark - CPU mark

CPU 1

CPU 2

22911

32662

3DMark Fire Strike - Physics Score

CPU 1

CPU 2

7681

8546

Name	Intel Core i9-11900KB	AMD Ryzen 9 3900XT
PassMark - Single thread mark	3310	2746
PassMark - CPU mark	22911	32662
3DMark Fire Strike - Physics Score	7681	8546

Compare specifications (specs)

	Intel Core i9-11900KB	AMD Ryzen 9 3900XT
Essentials
Architecture codename	Tiger Lake	Zen 2
Launch date	Q2'21	July 2020
Launch price (MSRP)	$539
Place in performance rating	556	592
Processor Number	i9-11900KB
Series	11th Generation Intel Core i9 Processors
Status	Launched
Vertical segment	Desktop	Desktop
OPN PIB		100-100000277WOF
Performance
64 bit support
Base frequency	3.30 GHz	3.8 GHz
Bus Speed	8 GT/s
L1 cache	768 KB
L2 cache	10 MB	6 MB
L3 cache	24 MB	64 MB
Manufacturing process technology	10 nm SuperFin	7 nm
Maximum core temperature	100°C
Maximum frequency	4.90 GHz	4.7 GHz
Number of cores	8	12
Number of threads	16	24
Unlocked
Memory
Max memory channels	2	2
Maximum memory bandwidth	51.2 GB/s
Maximum memory size	128 GB	128 GB
Supported memory types	Up to 3200 MT/s	DDR4-3200
ECC memory support
Graphics
Execution Units	32
Graphics base frequency	350 MHz
Graphics max dynamic frequency	1.45 GHz
Intel® Quick Sync Video
Processor graphics	Intel UHD Graphics for 11th Gen Intel Processors
Graphics interfaces
Number of displays supported	4
Graphics image quality
4K resolution support
Max resolution over DisplayPort	7680x4320@60Hz
Max resolution over eDP	4096 x 2304@60Hz
Graphics API support
DirectX	12
OpenGL	4.6
Compatibility
Configurable TDP-down	55 Watt
Configurable TDP-up	65 Watt
Max number of CPUs in a configuration	1
Package Size	50mm x 26.5mm
Sockets supported	FCBGA1787	AM4
Thermal Design Power (TDP)	65 Watt	105 Watt
Peripherals
Max number of PCIe lanes	20	20
PCIe configurations	Up to 1x16+1x4, 2x8+1x4, 1x8+3x4
PCI Express revision		4.0
Security & Reliability
Execute Disable Bit (EDB)
Intel® Identity Protection technology
Intel® OS Guard
Intel® Secure Key technology
Intel® Software Guard Extensions (Intel® SGX)
Intel® Trusted Execution technology (TXT)
Secure Boot
Advanced Technologies
Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions	Intel SSE4.1, Intel SSE4.2, Intel AVX2
Intel 64
Intel® AES New Instructions
Intel® Flex Memory Access
Intel® Hyper-Threading technology
Intel® Optane™ Memory Supported
Speed Shift technology
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)