i7-1265U vs i5-6400T

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Aggregate performance score

Core i5-6400T
2015
4 cores / 4 threads, 35 Watt
2.69
Core i7-1265U
2022
10 cores / 12 threads, 15 Watt
8.68
+223%

Core i7-1265U outperforms Core i5-6400T by a whopping 223% based on our aggregate benchmark results.

Primary details

Comparing Core i5-6400T and Core i7-1265U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1710878
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation0.47no data
Market segmentDesktop processorLaptop
SeriesIntel Core i5 (Desktop)Intel Alder Lake-M
Power efficiency7.2454.48
Architecture codenameSkylake (2015−2016)Alder Lake-U (2022)
Release date1 September 2015 (9 years ago)23 February 2022 (2 years ago)
Launch price (MSRP)$192no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i5-6400T and Core i7-1265U 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)10 (Deca-Core)
Threads412
Base clock speed2.2 GHz1.8 GHz
Boost clock speed2.8 GHz4.8 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 MB12 MB (shared)
Chip lithography14 nmIntel 7 nm
Die size122 mm2no data
Maximum core temperature66 °C100 °C
64 bit support++
Windows 11 compatibility-+

Compatibility

Information on Core i5-6400T and Core i7-1265U 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
SocketFCLGA1151FCBGA1744
Power consumption (TDP)35 Watt15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-6400T and Core i7-1265U. 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++
FMA-+
AVX++
vPro++
Enhanced SpeedStep (EIST)++
Speed Shiftno data+
Turbo Boost Technology2.0no data
Hyper-Threading Technology-+
TSX-+
Idle States+no data
Thermal Monitoring++
Flex Memory Accessno data+
SIPP-+
Deep Learning Boost-+

Security technologies

Core i5-6400T and Core i7-1265U 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 i7-1265U 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 i7-1265U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4DDR4, DDR5
Maximum memory size64 GB64 GB
Max memory channels22
Maximum memory bandwidth34.134 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel HD Graphics 530Intel® Iris® Xe Graphics eligible
Max video memory64 GBno data
Quick Sync Video++
Clear Video+no data
Clear Video HD+no data
Graphics max frequency950 MHz1.25 GHz
Execution Unitsno data96
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i5-6400T and Core i7-1265U 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 i7-1265U integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096x2304@24Hz4096 x 2304 @ 60Hz
Max resolution over eDP4096x2304@60Hz4096 x 2304 @ 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 i7-1265U integrated GPUs, sometimes API versions are included.

DirectX1212.1
OpenGL4.54.6

Peripherals

Specifications and connection of peripherals supported by Core i5-6400T and Core i7-1265U.

PCIe version3.04.0
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 2.69
i7-1265U 8.68
+223%

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 4280
i7-1265U 13787
+222%

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 935
i7-1265U 1944
+108%

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
i7-1265U 6322
+148%

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
i7-1265U 8549
+94.4%

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
i7-1265U 38152
+158%

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
i7-1265U 9434
+82.8%

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
i7-1265U 5.24
+146%

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
i7-1265U 16
+242%

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
i7-1265U 1345
+220%

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
i7-1265U 240
+102%

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
i7-1265U 2.99
+121%

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
i7-1265U 9.7
+341%

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
i7-1265U 81
+188%

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
i7-1265U 266
+90.7%

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
i7-1265U 5960
+115%

Gaming performance

Pros & cons summary


Performance score 2.69 8.68
Recency 1 September 2015 23 February 2022
Physical cores 4 10
Threads 4 12
Power consumption (TDP) 35 Watt 15 Watt

i7-1265U has a 222.7% higher aggregate performance score, an age advantage of 6 years, 150% more physical cores and 200% more threads, and 133.3% lower power consumption.

The Core i7-1265U is our recommended choice as it beats the Core i5-6400T in performance tests.

Note that Core i5-6400T is a desktop processor while Core i7-1265U is a notebook one.


Should you still have questions on choice between Core i5-6400T and Core i7-1265U, ask them in Comments section, and we shall answer.

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Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Core i5-6400T
Core i5-6400T
Intel Core i7-1265U
Core i7-1265U

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Community ratings

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Questions & comments

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