i9-9800X vs i9-9900K

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Primary details

Comparing Core i9-9900K and Core i9-9800X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking686not rated
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation7.91no data
Market segmentDesktop processorDesktop processor
SeriesCore i9 (Desktop)no data
Power efficiency11.44no data
Architecture codenameCoffee Lake-R (2018−2019)Skylake-X (2018)
Release date19 October 2018 (6 years ago)October 2018 (6 years ago)
Launch price (MSRP)$488no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i9-9900K and Core i9-9800X 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)8 (Octa-Core)
Threads1616
Base clock speed3.6 GHzno data
Boost clock speed5 GHz3.8 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
L1 cache64K (per core)64K (per core)
L2 cache256K (per core)1 MB (per core)
L3 cache16 MB (shared)16.5 MB (shared)
Chip lithography14 nm14 nm
Die size178 mm2no data
Maximum core temperature100 °Cno data
Maximum case temperature (TCase)72 °C72 °C
64 bit support++
Windows 11 compatibility+-
Unlocked multiplier++

Compatibility

Information on Core i9-9900K and Core i9-9800X 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-11512066
Power consumption (TDP)95 Watt165 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9900K and Core i9-9800X. 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)++
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX++
Idle States+no data
Thermal Monitoring+-
SIPP+-

Security technologies

Core i9-9900K and Core i9-9800X technologies aimed at improving security, for example, by protecting against hacks.

TXT++
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 Core i9-9800X are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9900K and Core i9-9800X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR4
Maximum memory size128 GBno data
Max memory channels2no data
Maximum memory bandwidth44.668 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel UHD Graphics 630no data
Max video memory64 GBno data
Quick Sync Video+-
Clear Video+no data
Clear Video HD+no data
Graphics max frequency1.2 GHzno data
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i9-9900K and Core i9-9800X integrated GPUs.

Number of displays supported3no data

Graphics image quality

Maximum display resolutions supported by Core i9-9900K and Core i9-9800X integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096x2304@24Hzno data
Max resolution over eDP4096x2304@60Hzno data
Max resolution over DisplayPort4096x2304@60Hzno data

Graphics API support

APIs supported by Core i9-9900K and Core i9-9800X integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.5no data

Peripherals

Specifications and connection of peripherals supported by Core i9-9900K and Core i9-9800X.

PCIe version3.0no data
PCI Express lanes16no data

Pros & cons summary


Power consumption (TDP) 95 Watt 165 Watt

i9-9900K has 73.7% lower power consumption.

We couldn't decide between Core i9-9900K and Core i9-9800X. We've got no test results to judge.


Should you still have questions on choice between Core i9-9900K and Core i9-9800X, ask them in Comments section, and we shall answer.

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Intel Core i9-9900K
Core i9-9900K
Intel Core i9-9800X
Core i9-9800X

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