Intel Core i9-9900X vs Intel Core i9-7940X

VS
Intel Core i9-9900X
Intel Core i9-9900X Image
Intel Core i9-7940X
Intel Core i9-7940X Image
Intel Core i9-9900X
Intel Core i9-7940X
Key Differences Key Differences Intel Core i9-9900X Intel Core i9-7940X
Cores 10 14
CPU Threads 20 28
Base Clock Speed 3.5GHz 3.1GHz
Turbo Clock Speed 4.4GHz 4.4GHz
TDP (THERMAL DESIGN POINT) 165W 165W
Has integrated graphics No No
Performance per watt 61.8 Not Known
Performance Performance Intel Core i9-9900X Intel Core i9-7940X
CPU Speed & Cores 10 x 3.5GHz 14 x 3.1GHz
Number of CPU Threads 20 28
L2 Cache Size 10MB 14MB
L3 Cache Size 19.25MB 19.2MB
Turbo Boost Frequency 4.4GHz 4.4GHz
L1 Cache Size 640KB 448KB
L2 Core 1MB/core 1MB/core
L3 Core 1.93MB/core 1.3MB/core
Clock Multiplier 35 Not Known
Turbo Boost Tech Version 2 3
Does it have an unlocked multiplier No Yes
Uses ARM big.LITTLE tech No No
Uses ARM HMP No No
Features Features Intel Core i9-9900X Intel Core i9-7940X
Has AES Support Yes Yes
Supports CPU Throttling Yes Yes
Supported SSE Version 4.2 Not Known
Has AVX Support Yes Yes
Has MMX Tech Support Yes No
Has F16C Support Yes Yes
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
Has FMA4 Instructions Support No No
General info General info Intel Core i9-9900X Intel Core i9-7940X
Has 64-bit Support No Data Found No Data Found
Semiconductor Size 14nm 14nm
TDP (Thermal Design Point) 165W 165W
PCI Express Version 3 3
CPU Temperature 92°C Not Known
Does it have Integrated Graphics No No
Supports Power Optimized L2 Cache No No
Memory Memory Intel Core i9-9900X Intel Core i9-7940X
RAM Memory Speed 2666MHz 2666MHz
Max Memory Channels 4 4
Supported Memory Size 128GB Not Known
Bus Bandwidth 8GT/s Not Known
ECC (Error-Correcting Code) Memory Support No No
DDR Type Memory Version 4 Not Known
Benchmarks Benchmarks Intel Core i9-9900X Intel Core i9-7940X
PassMark Score 21793 Not Known
PassMark Score (Single Thread) 2590 Not Known
Geekbench 5 Score (Multi-Thread) 10204 Not Known
Cinebench R20 Score (Multi-Thread) 4855 Not Known
Cinebench R20 Score (Single Thread) 455 Not Known
Geekbench 5 Score (Single Thread) 1115 Not Known
PassMark Score (Overclocked) 23091 Not Known
CPU Performance (Per Watt) 61.8 Not Known

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