i9-12900 vs i5-6400T

Aggregate performance score

Core i5-6400T
2015
4 cores / 4 threads, 35 Watt
2.70
Core i9-12900
2022
16 cores / 24 threads, 65 Watt
21.66
+702%

Core i9-12900 outperforms Core i5-6400T by a whopping 702% based on our aggregate benchmark results.

Primary details

Comparing Core i5-6400T and Core i9-12900 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1698244
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation0.3833.28
Market segmentDesktop processorDesktop processor
SeriesIntel Core i5 (Desktop)no data
Power efficiency7.2731.40
Architecture codenameSkylake (2015−2016)Alder Lake-S (2022)
Release date1 September 2015 (9 years ago)4 January 2022 (2 years ago)
Launch price (MSRP)$192$489

Cost-effectiveness evaluation

Performance per price, higher is better.

i9-12900 has 8658% better value for money than i5-6400T.

Detailed specifications

Core i5-6400T and Core i9-12900 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 cores4 (Quad-Core)16 (Hexadeca-Core)
Threads424
Base clock speed2.2 GHz2.4 GHz
Boost clock speed2.8 GHz5.1 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier22no data
L1 cache256 KB80K (per core)
L2 cache1 MB1.25 MB (per core)
L3 cache6 MB30 MB (shared)
Chip lithography14 nmIntel 7 nm
Die size122 mm2215 mm2
Maximum core temperature66 °C100 °C
Maximum case temperature (TCase)no data72 °C
64 bit support++
Windows 11 compatibility-+
Unlocked multiplier-+

Compatibility

Information on Core i5-6400T and Core i9-12900 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
SocketFCLGA1151FCLGA1700
Power consumption (TDP)35 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-6400T and Core i9-12900. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI++
AVX++
vPro+no data
Enhanced SpeedStep (EIST)++
Speed Shiftno data+
Turbo Boost Technology2.02.0
Hyper-Threading Technology-+
TSX-+
Idle States++
Thermal Monitoring++
SIPP-+
Turbo Boost Max 3.0no data+
Deep Learning Boost-+

Security technologies

Core i5-6400T and Core i9-12900 technologies aimed at improving security, for example, by protecting against hacks.

TXT-+
EDB++
Secure Key++
MPX+-
Identity Protection+-
SGXYes with Intel® MEno data
OS Guard++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-6400T and Core i9-12900 are enumerated here.

AMD-V+-
VT-d++
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-6400T and Core i9-12900. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4DDR4, DDR5
Maximum memory size64 GB128 GB
Max memory channels22
Maximum memory bandwidth34.134 GB/s76.8 GB/s
ECC memory support-+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
Intel HD Graphics 530Intel UHD Graphics 770
Max video memory64 GBno data
Quick Sync Video++
Clear Video+no data
Clear Video HD++
Graphics max frequency950 MHz1.55 GHz
Execution Unitsno data32
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i5-6400T and Core i9-12900 integrated GPUs.

Number of displays supported34
eDP+no data
DisplayPort+-
HDMI+-
DVI+no data

Graphics image quality

Maximum display resolutions supported by Core i5-6400T and Core i9-12900 integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096x2304@24Hz4096 x 2160 @ 60Hz
Max resolution over eDP4096x2304@60Hz5120 x 3200 @ 120Hz
Max resolution over DisplayPort4096x2304@60Hz7680 x 4320 @ 60Hz
Max resolution over VGAN/Ano data

Graphics API support

APIs supported by Core i5-6400T and Core i9-12900 integrated GPUs, sometimes API versions are included.

DirectX1212
OpenGL4.54.5

Peripherals

Specifications and connection of peripherals supported by Core i5-6400T and Core i9-12900.

PCIe version3.05.0 and 4.0
PCI Express lanes1620

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.

i5-6400T 2.70
i9-12900 21.66
+702%

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.

i5-6400T 4277
i9-12900 34284
+702%

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.

i5-6400T 933
i9-12900 2534
+172%

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.

i5-6400T 2552
i9-12900 13346
+423%

Cinebench 10 32-bit single-core

Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.

i5-6400T 4397
i9-12900 8949
+104%

Cinebench 10 32-bit multi-core

Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.

i5-6400T 14798
i9-12900 68729
+364%

3DMark06 CPU

3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.

i5-6400T 5161
i9-12900 17464
+238%

wPrime 32

wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.

i5-6400T 12.88
i9-12900 2.67
+382%

Cinebench 11.5 64-bit multi-core

Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.

i5-6400T 5
i9-12900 39
+708%

Cinebench 15 64-bit multi-core

Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.

i5-6400T 420
i9-12900 3299
+685%

Cinebench 15 64-bit single-core

Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.

i5-6400T 119
i9-12900 262
+120%

Cinebench 11.5 64-bit single-core

Cinebench R11.5 is an old benchmark by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version loads a single thread with ray tracing to render a glossy room full of crystal spheres and light sources.

i5-6400T 1.35
i9-12900 3.16
+134%

TrueCrypt AES

TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.

i5-6400T 2.2
i9-12900 17.2
+682%

x264 encoding pass 2

x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.  

i5-6400T 28
i9-12900 148
+425%

x264 encoding pass 1

x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.  

i5-6400T 139
i9-12900 310
+123%

WinRAR 4.0

WinRAR 4.0 is an outdated version of a popular file archiver. It contains an internal speed test, using 'Best' setting of RAR compression on large chunks of randomly generated data. Its results are measured in kilobytes per second.

i5-6400T 2770
i9-12900 10739
+288%

Gaming performance

Pros & cons summary


Performance score 2.70 21.66
Integrated graphics card 2.59 6.15
Recency 1 September 2015 4 January 2022
Physical cores 4 16
Threads 4 24
Power consumption (TDP) 35 Watt 65 Watt

i5-6400T has 85.7% lower power consumption.

i9-12900, on the other hand, has a 702.2% higher aggregate performance score, 137.5% faster integrated GPU, an age advantage of 6 years, and 300% more physical cores and 500% more threads.

The Core i9-12900 is our recommended choice as it beats the Core i5-6400T in performance tests.


Should you still have questions on choice between Core i5-6400T and Core i9-12900, ask them in Comments section, and we shall answer.

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Intel Core i5-6400T
Core i5-6400T
Intel Core i9-12900
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Community ratings

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Questions & comments

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