Intel Core i9 10900X vs i7 7800X

We compared two desktop CPUs: the 3.7 GHz Intel Core i9 10900X with 10-cores against the 3.5 GHz i7 7800X with 6-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.


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 Efficiency
The efficiency score of electricity consumption
NanoReview Final Score
Generic CPU rating

Key Differences

What are the key differences between 7800X and 10900X
Advantages of Intel Core i9 10900X
  • Has 12 MB larger L3 cache size
  • Supports up to 256 GB DDR4-2933 RAM
  • Newer - released 2-years and 5-months later
  • Has 4 more physical cores
  • 13% higher Turbo Boost frequency (4.5 GHz vs 4 GHz)
Advantages of Intel Core i7 7800X
  • Consumes up to 15% less energy than the Core i9 10900X – 140 vs 165 Watt
  • More than 6° C higher critical temperature


Comparing the performance of CPUs in benchmarks
Cinebench R23 (Single-Core)
Cinebench R23 (Multi-Core)
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
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Full technical specification of Intel Core i9 10900X and i7 7800X


Vendor Intel Intel
Released October 7, 2019 May 30, 2017
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Cascade Lake Skylake
Model number i9-10900X i7-7800X
Socket LGA-2066 LGA-2066
Integrated GPU No No


Cores 10 6
Threads 20 12
Base Frequency 3.7 GHz 3.5 GHz
Turbo Boost Frequency 4.5 GHz 4 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 37x 35x
Bus Bandwidth - 8 GT/s
L1 Cache 64K (per core) 64K (per core)
L2 Cache 1MB (per core) 1MB (per core)
L3 Cache 20MB (shared) 8MB (shared)
Unlocked Multiplier Yes Yes


Fabrication process 14 nm 14 nm
TDP 165 W 140 W
Max. temperature 94°C 100°C

Memory support

Memory types DDR4-2933 DDR4-2400
Memory Size 256 GB 128 GB
Max. Memory Channels 4 4
Max. Memory Bandwidth - 79.47 GB/s
ECC Support No No


Official site Intel Core i9 10900X official page Intel Core i7 7800X official page
PCI Express Version 3.0 3.0
PCI Express Lanes 48 28
Extended instructions SSE4.1, SSE4.2, AVX-2, AVX-512 SSE4.1, SSE4.2, AVX-2, AVX-512

Cast your vote

Choose between two processors
5 (83.3%)
1 (16.7%)
Total votes: 6


So which CPU will you choose: Intel Core i7 7800X or i9 10900X?