Intel Core i9-9940X vs Intel Core i5-8400T

VS
Intel Core i9-9940X
Intel Core i9-9940X Image
Intel Core i5-8400T
Intel Core i5-8400T Image
Intel Core i9-9940X
Intel Core i5-8400T
Key Differences Key Differences Intel Core i9-9940X Intel Core i5-8400T
Cores 14 6
CPU Threads 28 6
Base Clock Speed 3.3GHz 1.7GHz
Turbo Clock Speed 4.4GHz 3.3GHz
TDP (THERMAL DESIGN POINT) 165W 35W
Has integrated graphics No Yes
Performance per watt 83.2 104.5
Performance Performance Intel Core i9-9940X Intel Core i5-8400T
CPU Speed & Cores 14 x 3.3GHz 6 x 1.7GHz
Number of CPU Threads 28 6
L2 Cache Size 14MB 1.5MB
L3 Cache Size 19.25MB 9MB
Turbo Boost Frequency 4.4GHz 3.3GHz
L1 Cache Size 896KB 384KB
L2 Core 1MB/core 0.25MB/core
L3 Core 1.38MB/core 1.5MB/core
Clock Multiplier 33 17
Turbo Boost Tech Version 2 2
Does it have an unlocked multiplier No No
Uses ARM big.LITTLE tech No No
Uses ARM HMP No No
Features Features Intel Core i9-9940X Intel Core i5-8400T
Has AES Support Yes Yes
Supports CPU Throttling Yes No
Supported SSE Version 4.2 4.2
Has AVX Support Yes Yes
Has MMX Tech Support Yes Yes
Has F16C Support Yes Yes
Has FMA4 Instructions Support No No
Has Multithreading Tech Support Yes Yes
Has NX Processor Bit Support Yes Yes
Has FMA3 Instructions Support Yes Yes
Supports ARM TrustZone Tech No No
Miscellaneous Miscellaneous Intel Core i9-9940X Intel Core i5-8400T
Height 45mm 37.5mm
Width Size 52.5mm 37.5mm
General info General info Intel Core i9-9940X Intel Core i5-8400T
Has 64-bit Support No Data Found No Data Found
Semiconductor Size 14nm 14nm
TDP (Thermal Design Point) 165W 35W
PCI Express Version 3 3
CPU Temperature 88°C 100°C
Height 45mm 37.5mm
Width Size 52.5mm 37.5mm
Does it have Integrated Graphics No Yes
GPU Base Clock Speed Not Known 350MHz
DirectX Version Info Not Known 12
OpenGL Driver Version Not Known 4.5
OpenGL Driver Version Not Known 2
GPU Boost Clock Speed Not Known 1050MHz
No. of Supported Displays Not Known 3
Supports Power Optimized L2 Cache No No
Memory Memory Intel Core i9-9940X Intel Core i5-8400T
RAM Memory Speed 2666MHz 2666MHz
Max Memory Bandwidth 79.47GB/s 41.6GB/s
Max Memory Channels 4 2
Supported Memory Size 128GB 64GB
Bus Bandwidth 8GT/s 8GT/s
ECC (Error-Correcting Code) Memory Support No No
DDR Type Memory Version 4 4
Benchmarks Benchmarks Intel Core i9-9940X Intel Core i5-8400T
PassMark Score 28274 7763
PassMark Score (Single Thread) 2627 2002
Geekbench 5 Score (Multi-Thread) 13722 3659
Cinebench R20 Score (Multi-Thread) 5912 Not Known
Cinebench R20 Score (Single Thread) 457 Not Known
Geekbench 5 Score (Single Thread) 1148 860
Blender Score (Classroom) 329.7seconds Not Known
Blender Score (bmw27) 110.3seconds Not Known
PassMark Score (Overclocked) 29664 Not Known
CPU Performance (Per Watt) 83.2 104.5

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