Core i5-12400 vs Core i9-9900KS

General info

Comparing Core i9-9900KS and Core i5-12400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	545	549
Place by popularity	not in top-100	84
Value for money	19.24	61.05
Market segment	Desktop processor	Desktop processor
Series	Intel Core i9	no data
Architecture codename	Coffee Lake-R (2018−2019)	Alder Lake-S (2022)
Release date	28 October 2019 (4 years ago)	4 January 2022 (2 years ago)
Launch price (MSRP)	$513	no data
Current price	$384 (0.7x MSRP)	$94

Value for money

Performance per price, higher is better.

i5-12400 has 217% better value for money than i9-9900KS.

Technical specs

Core i9-9900KS and Core i5-12400 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)	6 (Hexa-Core)
Threads	16	12
Base clock speed	4 GHz	2.5 GHz
Boost clock speed	5 GHz	4.4 GHz
L1 cache	64K (per core)	80K (per core)
L2 cache	256K (per core)	1.25 MB (per core)
L3 cache	16 MB (shared)	18 MB (shared)
Chip lithography	14 nm	Intel 7 nm
Die size	178 mm2	163 mm2
Maximum core temperature	100 °C	100 °C
Maximum case temperature (TCase)	72 °C	no data
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	Yes	No

Compatibility

Information on Core i9-9900KS and Core i5-12400 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	FCLGA1151	FCLGA1700
Power consumption (TDP)	127 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9900KS and Core i5-12400. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i9-9900KS and Core i5-12400 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9900KS and Core i5-12400 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9900KS and Core i5-12400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR5-4800, DDR4-3200
Maximum memory size	128 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	41.6 GB/s	76.8 GB/s
ECC memory support	-	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel UHD Graphics 630	Intel UHD Graphics 730
Max video memory	64 GB	no data
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	+
Graphics max frequency	1.2 GHz	1.45 GHz
Execution Units	no data	24
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i9-9900KS and Core i5-12400 integrated GPUs.

Number of displays supported

3

4

Graphics image quality

Maximum display resolutions supported by Core i9-9900KS and Core i5-12400 integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096 x 2304@24Hz	4096 x 2160 @ 60Hz
Max resolution over eDP	4096 x 2304@60Hz	5120 x 3200 @ 120Hz
Max resolution over DisplayPort	4096 x 2304@60Hz	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i9-9900KS and Core i5-12400 integrated GPUs, sometimes API versions are included.

DirectX	12	12
OpenGL	4.5	4.5

Peripherals

Specifications and connection of peripherals supported by Core i9-9900KS and Core i5-12400.

PCIe version	3.0	5.0 and 4.0
PCI Express lanes	16	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.

Advantages and disadvantages

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Performance score	12.62	12.56
Integrated graphics card	3.08
Recency	28 October 2019	4 January 2022
Physical cores	8	6
Threads	16	12
Power consumption (TDP)	127 Watt	65 Watt

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Should you still have questions on choice between Core i9-9900KS and Core i5-12400, ask them in Comments section, and we shall answer.

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