Ryzen 9 3900XT vs i9-9900K

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Aggregate performance score

Core i9-9900K
2018
8 cores / 16 threads, 95 Watt
11.49
Ryzen 9 3900XT
2020
12 cores / 24 threads, 105 Watt
20.56
+78.9%

Ryzen 9 3900XT outperforms Core i9-9900K by an impressive 79% based on our aggregate benchmark results.

Primary details

Comparing Core i9-9900K and Ryzen 9 3900XT processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking686274
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation7.9226.06
Market segmentDesktop processorDesktop processor
SeriesCore i9 (Desktop)AMD Ryzen 9
Power efficiency11.4418.52
Architecture codenameCoffee Lake-R (2018−2019)Matisse 2 (2020)
Release date19 October 2018 (6 years ago)7 July 2020 (4 years ago)
Launch price (MSRP)$488$499

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 3900XT has 229% better value for money than i9-9900K.

Detailed specifications

Core i9-9900K and Ryzen 9 3900XT 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 cores8 (Octa-Core)12 (Dodeca-Core)
Threads1624
Base clock speed3.6 GHz3.8 GHz
Boost clock speed5 GHz4.7 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
L1 cache64K (per core)96K (per core)
L2 cache256K (per core)512K (per core)
L3 cache16 MB (shared)64 MB
Chip lithography14 nm7 nm, 12 nm
Die size178 mm274 mm2
Maximum core temperature100 °Cno data
Maximum case temperature (TCase)72 °C95 °C
Number of transistorsno data3,800 million
64 bit support++
Windows 11 compatibility++
Unlocked multiplier++

Compatibility

Information on Core i9-9900K and Ryzen 9 3900XT 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 configuration1 (Uniprocessor)1
SocketLGA-1151AM4
Power consumption (TDP)95 Watt105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9900K and Ryzen 9 3900XT. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2no data
AES-NI++
AVX++
vPro+no data
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX+-
Idle States+no data
Thermal Monitoring+-
SIPP+-
Precision Boost 2no data+

Security technologies

Core i9-9900K and Ryzen 9 3900XT technologies aimed at improving security, for example, by protecting against hacks.

TXT+no data
EDB+no data
Secure Key+no data
MPX+-
Identity Protection+-
SGXYes with Intel® MEno data
OS Guard+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9900K and Ryzen 9 3900XT are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9900K and Ryzen 9 3900XT. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR4-3200
Maximum memory size128 GB128 GB
Max memory channels22
Maximum memory bandwidth44.668 GB/s51.196 GB/s
ECC memory support-+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel UHD Graphics 630-
Max video memory64 GB-
Quick Sync Video+-
Clear Video+-
Clear Video HD+-
Graphics max frequency1.2 GHz-
InTru 3D+-

Graphics interfaces

Available interfaces and connections of Core i9-9900K and Ryzen 9 3900XT integrated GPUs.

Number of displays supported3-

Graphics image quality

Maximum display resolutions supported by Core i9-9900K and Ryzen 9 3900XT integrated GPUs, including resolutions over different interfaces.

4K resolution support+-
Max resolution over HDMI 1.44096x2304@24Hz-
Max resolution over eDP4096x2304@60Hz-
Max resolution over DisplayPort4096x2304@60Hz-

Graphics API support

APIs supported by Core i9-9900K and Ryzen 9 3900XT integrated GPUs, sometimes API versions are included.

DirectX12-
OpenGL4.5-

Peripherals

Specifications and connection of peripherals supported by Core i9-9900K and Ryzen 9 3900XT.

PCIe version3.04.0
PCI Express lanes16no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


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.

i9-9900K 11.49
Ryzen 9 3900XT 20.56
+78.9%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i9-9900K 18248
Ryzen 9 3900XT 32659
+79%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i9-9900K 1701
Ryzen 9 3900XT 1741
+2.4%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i9-9900K 8053
Ryzen 9 3900XT 9908
+23%

Gaming performance

Pros & cons summary


Performance score 11.49 20.56
Recency 19 October 2018 7 July 2020
Physical cores 8 12
Threads 16 24
Chip lithography 14 nm 7 nm
Power consumption (TDP) 95 Watt 105 Watt

i9-9900K has 10.5% lower power consumption.

Ryzen 9 3900XT, on the other hand, has a 78.9% higher aggregate performance score, an age advantage of 1 year, 50% more physical cores and 50% more threads, and a 100% more advanced lithography process.

The Ryzen 9 3900XT is our recommended choice as it beats the Core i9-9900K in performance tests.


Should you still have questions on choice between Core i9-9900K and Ryzen 9 3900XT, ask them in Comments section, and we shall answer.

Vote for your favorite

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Intel Core i9-9900K
Core i9-9900K
AMD Ryzen 9 3900XT
Ryzen 9 3900XT

Similar processor comparisons

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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Questions & comments

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