Home > CPU Comparisons > Core i7 6950X or Core i5 9400F: what's better?

Intel Core i7 6950X vs i5 9400F

We compared two desktop CPUs: the 3 GHz Intel Core i7 6950X with 10-cores against the 2.9 GHz i5 9400F with 6-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.

NanoReview Review

General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Measure performance when all cores are involved
Power Consumption
The efficiency score of electricity consumption
NanoReview Final Score
Generic CPU rating

Key Differences

What are the key differences between 9400F and 6950X
Advantages of Intel Core i7 6950X
  • Has 16 MB larger L3 cache size
  • Supports quad-channel memory
  • Has 4 physical cores more than the 9400F
Advantages of Intel Core i5 9400F
  • Newer - released 2 years and 8 months later
  • Consumes up to 54% less energy than the Core i7 6950X – 65 vs 140 Watt
  • 17% higher Turbo Boost frequency (4.1 GHz vs 3.5 GHz)


Comparing the performance of CPUs in benchmarks
Cinebench R20 (Single-Core)
Cinebench R20 (Multi-Core)
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)


Full technical specification of Intel Core i7 6950X and i5 9400F


Vendor Intel Intel
Released May 30, 2016 January 7, 2019
Launch price 1723 USD 189 USD
Type Desktop Desktop
Codename Broadwell E Coffee Lake
Model number i7-6950X i5-9400F
Socket LGA-2011-3 LGA-1151
Integrated GPU No No


Cores 10 6
Threads 20 6
Base Frequency 3 GHz 2.9 GHz
Turbo Boost Frequency 3.5 GHz 4.1 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 30x 29x
Bus Bandwidth - 8 GT/s
L1 Cache 32K (per core) 64K (per core)
L2 Cache 256K (per core) 256K (per core)
L3 Cache 25MB (shared) 9MB (shared)
Unlocked Multiplier No No


Fabrication Process 14 nm 14 nm
TDP 140 W 65 W
Max. temperature - 100°C

Memory support

Memory types DDR4-2133 DDR4-2666
Memory Size 128 GB 128 GB
Max. Memory Channels 4 2
Max. Memory Bandwidth - 41.6 GB/s
EEC Support No No


Official site Intel Core i7 6950X official page Intel Core i5 9400F official page
PCI Express Version 3.0 3.0
PCI Express Lanes 40 16
Instruction Set - SSE4.1, SSE4.2, AVX-2

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So which CPU will you choose: Intel Core i5 9400F or i7 6950X?