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Intel Core i7 8700K vs AMD Ryzen 9 3900X

We compared two desktop CPUs: the 3.7 GHz Intel Core i7 8700K with 6-cores against the 3.8 GHz AMD Ryzen 9 3900X with 12-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.

Review

General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Performance
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 3900X and 8700K
Advantages of Intel Core i7 8700K
  • Includes an integrated GPU Intel UHD Graphics 630
  • Consumes up to 10% less energy than the Ryzen 9 3900X – 95 vs 105 Watt
  • 2% higher Turbo Boost frequency (4.7 GHz vs 4.6 GHz)
Advantages of AMD Ryzen 9 3900X
  • Has 52 MB larger L3 cache size
  • More modern manufacturing process – 7 versus 14 nanometers
  • Has 6 more physical cores
  • Newer - released 1-year and 10-months later
  • Newer PCI Express version – 4.0
  • Around 6.08 GB/s (15%) higher theoretical memory bandwidth

Benchmarks

Comparing the performance of CPUs in benchmarks
Cinebench R20 (Single-Core)
Cinebench R20 (Multi-Core)
7056
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
32554
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
11657

Specifications

Full technical specification of Intel Core i7 8700K and AMD Ryzen 9 3900X

General

Vendor Intel AMD
Released October 5, 2017 July 7, 2019
Launch price 359 USD 499 USD
Type Desktop Desktop
Codename Coffee Lake Zen 2
Model number i7-8700K -
Socket LGA-1151 AM4
Integrated GPU UHD Graphics 630 No

Performance

Cores 6 12
Threads 12 24
Base Frequency 3.7 GHz 3.8 GHz
Turbo Boost Frequency 4.7 GHz 4.6 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 37x 38x
Bus Bandwidth 8 GT/s -
L1 Cache 64K (per core) 64K (per core)
L2 Cache 256K (per core) 512K (per core)
L3 Cache 12MB (shared) 64MB (shared)
Unlocked Multiplier Yes Yes

Power

Transistors - 19.2 billions
Fabrication process 14 nm 7 nm
TDP 95 W 105 W
Max. temperature 100°C 95°C

iGPU

Integrated Graphics Intel UHD Graphics 630 -
GPU Base Clock 350 MHz -
GPU Boost Clock 1000 MHz -
Shading Units 192 -
TMUs 24 -
ROPs 3 -
Execution Units 24 -
TGP 15 W -
Max. Resolution 4096x2304 - 60 Hz -
iGPU FLOPS
0.38 TFLOPS

Memory support

Memory types DDR4-2666 DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 41.6 GB/s 47.68 GB/s
ECC Support No Yes

Misc

Official site Intel Core i7 8700K official page AMD Ryzen 9 3900X official page
PCI Express Version 3.0 4.0
PCI Express Lanes 16 20
Instruction Set SSE4.1, SSE4.2, AVX-2 -

Cast your vote

Choose between two processors
11 (32.4%)
23 (67.6%)
Total votes: 34

Comments

So which CPU will you choose: AMD Ryzen 9 3900X or Intel Core i7 8700K?