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Intel Core i7 8700K vs AMD Ryzen 9 3900X:
performance comparison
VS
Intel Core i7 8700K
AMD Ryzen 9 3900X
Which is better: 6-core Intel Core i7 8700K at 3. 7 GHz or AMD Ryzen 9 3900X with 12 cores at 3.8 GHz? To find out, read our comparative testing of these desktop processors in popular benchmarks, games and heavy applications.
- Overview
- Differences
- Performance
- Features
- Comments
Overview
Overview and comparison of the main metrics from NanoReview
Single-threaded performance
Rating in tests using a single core
Core i7 8700K
56
Ryzen 9 3900X
60
900 02 Multi-threaded performance
All-core benchmarks
Core i7 8700K
29
Ryzen 9 3900X
59
Power Efficiency
Chip Power Efficiency
Core i7 8700 K
44
Ryzen 9 3900X
60
NanoReview Rating
Final CPU Score
Core i7 8700K
43
Ryzen 9 3900X
60
Key differences
What are the main differences between 3900X and 8700K
Reasons to choose Intel Core i7 8700K
- There is an integrated graphics accelerator Intel UHD Graphics 630
- 2% higher frequency in Turbo Boost (4.
7 GHz vs 4.6 GHz)
Reasons to choose AMD Ryzen 9 3900X
- Has 53248 KB more L3 cache
- More modern process technology — 7 vs. 14 nanometers
- Has 6 more physical cores
- was 1 year and 10 months later than the competitor
- New PCI Express — 4.0 standard
- 6.08 GB/s (15%) higher maximum memory bandwidth
Benchmark tests
Compare the results of processor tests in benchmarks
Cinebench R23 (single core)
Core i7 8700K
1209
Ryzen 9 3900X
+8%
1311
Cinebench R23 (multi-core)
Core i7 8700K
8817
Ryzen 93900X
+111%
18643
Passmark CPU (single core)
Core i7 8700K
+2%
2738
Ryzen 9 3900X
2688
Passmark CPU (multi-core)
Core i7 8700K
13644
Ryzen 9 3900X
+138%
32501
Geekbench 5 (single core)
Core i7 8700K
1231
Ryzen 9 3900X
+7%
1318
Geekbench 5 (multi-core)
Core i7 8700K
6618
Ryzen 9 3900X
+81%
11979
Add your Cinebench R23 results
Specifications
List of full technical specifications for Intel Core i7 8700K and AMD Ryzen 9 3900X
General information
Manufacturer | Intel | AMD |
Release date | October 5, 2017 | July 7, 2019 |
Type | Desktop | Desktop |
Instruction set architecture | x86-64 | x86-64 |
Codename | Coffee Lake | — |
Model number | i7-8700K | — |
Integrated graphics | UHD Graphics 630 | No |
Processor
Cores | 6 | 12 |
threads | 12 | 24 |
Frequency | 3.![]() |
3.8 GHz |
Max. frequency in Turbo Boost | 4.7 GHz | 4.6 GHz |
Number of cores | 6 | 12 |
Number of threads | 12 | 24 |
Bus frequency | 100 MHz | 100 MHz |
Multiplier | 37x | 38x |
Bus speed | 8 GT/s | — |
Level 1 cache | 64KB (per core) | 64KB (per core) |
Level 2 cache | 256KB (per core) | 512KB (per core) |
Level 3 cache | 12MB (shared) | 64MB (shared) |
Unlocked multiplier | Yes | Yes |
Number of transistors | — | 3.8 billion |
Process | 14 nanometers | 7 nanometers |
Power consumption (TDP) | 95 W | 105W |
Socket | LGA-1151 | AM4 |
Critical temperature | 100°C | 95°C |
Integrated graphics | Intel UHD Graphics 630 | — |
GPU frequency | 350 MHz | — |
Boost GPU frequency | 1200 MHz | — |
Shader blocks | 192 | — |
TMUs | 24 | — |
ROPs | 3 | — |
Computer units | 24 | — |
TGP | 15W | — |
Max.![]() |
4096×2304 — 60Hz | — |
iGPU FLOPS
Core i7 8700K
0.38 teraflops
Ryzen 9 3900X
n/a
9000 2
Memory support
Memory type | — DDR4-2666 | — DDR4-3200 |
Max. size | 128 GB | 128 GB |
Number of channels | 2 | 2 |
Max. bandwidth | 41.6 GB/s | 47.68 GB/s |
ECC support | No | Yes |
Other
Official site | Site Intel Core i7 8700K | AMD Ryzen 9 3900X |
PCI Express Version | 3.0 | 4.0 |
Max. PCI Express lanes | 16 | 16 |
Extended instructions | SSE4.1, SSE4.2, AVX-2 | — |
Poll
What processor do you think is the best?
Core i7 8700K
11 (27. 5%)
Ryzen 9 3900X
29 (72.5%)
Total votes: 40 9 0003
Competitors
1.
AMD Ryzen 9 7950X vs. AMD Ryzen 9 3900X
2.
AMD Ryzen 5 7600X vs. AMD Ryzen 9 3900X
3.
Intel Core i5 13600K vs AMD Ryzen 93900X
4.
AMD Ryzen 9 5900X vs. AMD Ryzen 9 3900X
5.
AMD Ryzen 7 7800X3D vs. AMD Ryzen 9 3900X
6.
AMD Ryzen 7 5800X vs. AMD Ryzen 9 3900X
7.
AMD Ryzen 9 7900X vs. AMD Ryzen 9 3900X
8.
AMD Ryzen 7 5800X3D vs Intel Core i7 8700K
9.
Intel Core i5 12600K vs. Intel Core i7 8700K
10.
Intel Core i5 12400F vs. Intel Core i7 8700K
Compare other CPUs (540+)
Intel Core i7 8700K vs AMD Ryzen 9 3900XT:
performance comparison
VS
Intel Core i7 8700K
AMD Ryzen 9 3900XT
Which is better: 6-core Intel Core i7 8700K at 3. 7 GHz or AMD Ryzen 9 3900XT with 12 cores at 3.8 GHz? To find out, read our comparative testing of these desktop processors in popular benchmarks, games and heavy applications.
- Overview
- Differences
- Performance
- Features
- Comments
Overview
Overview and comparison of the main metrics from NanoReview
Single-threaded performance
Single core benchmark rating
Core i7 8700K
56
Ryzen 9 3900XT
60
900 02 Multi-threaded performance
All core benchmarks
Core i7 8700K
29
Ryzen 9 3900XT
59
Energy Efficiency
Chip Power Efficiency
Core i7 8700K
44
Ryzen 9 3900XT
66
NanoReview Rating
Final Processor Score
Core i7 8700K
43
Ryzen 9 3900XT
61
Key differences
What are the main differences between 3900XT and 8700K
Reasons to choose Intel Core i7 8700K
- There is an integrated graphics accelerator Intel UHD Graphics 630
Reasons to choose AMD Ryzen 9 3900XT
- Has 53248 KB more L3 cache
- More modern process technology — 7 vs.
14 nanometers
- Has 6 more physical cores
- was 2 years and 10 months later than the competitor
- New PCI Express — 4.0 standard
- 6.08 GB/s (15%) higher maximum memory bandwidth
Benchmark tests
Compare the results of processor tests in benchmarks
Cinebench R23 (single core)
Core i7 8700K
1209
Ryzen 9 3900XT
+12%
1350
Cinebench R23 (multi-core)
Core i7 8700K
8817
Ryzen 93900XT
+108%
18317
Passmark CPU (single core)
Core i7 8700K
2738
Ryzen 9 3900XT
2745
Passmark CPU (multi-core)
Core i7 8700K
13644
Ryzen 9 3900XT
+139%
32670
Geekbench 5 (single core)
Core i7 8700K
1231
Ryzen 9 3900XT
+6%
1309
Geekbench 5 (multi-core)
Core i7 8700K
6618
Ryzen 9 3900XT
+85%
12251
Add your Cinebench R23 results
Specifications
List of full specifications for Intel Core i7 8700K and AMD Ryzen 9 3900XT
General information
Manufacturer | Intel | AMD |
Release date | October 5, 2017 | July 7, 2020 |
Type | Desktop | Desktop |
Instruction set architecture | x86-64 | x86-64 |
Codename | Coffee Lake | Zen 2 (Matisse) |
Model number | i7-8700K | — |
Integrated graphics | UHD Graphics 630 | No |
Processor
Cores | 6 | 12 |
threads | 12 | 24 |
Frequency | 3.![]() |
3.8 GHz |
Max. frequency in Turbo Boost | 4.7 GHz | 4.7 GHz |
Number of cores | 6 | 12 |
Number of threads | 12 | 24 |
Bus frequency | 100 MHz | 100 MHz |
Multiplier | 37x | 38x |
Bus speed | 8 GT/s | — |
Level 1 cache | 64KB (per core) | 64KB (per core) |
Level 2 cache | 256KB (per core) | 512KB (per core) |
Level 3 cache | 12MB (shared) | 64MB (shared) |
Unlocked multiplier | Yes | Yes |
Number of transistors | — | 3.8 billion |
Process | 14 nanometers | 7 nanometers |
Power consumption (TDP) | 95 W | 105W |
Socket | LGA-1151 | AM4 |
Critical temperature | 100°C | 95°C |
Integrated graphics | Intel UHD Graphics 630 | — |
GPU frequency | 350 MHz | — |
Boost GPU frequency | 1200 MHz | — |
Shader blocks | 192 | — |
TMUs | 24 | — |
ROPs | 3 | — |
Computer units | 24 | — |
TGP | 15W | — |
Max.![]() |
4096×2304 — 60Hz | — |
iGPU FLOPS
Core i7 8700K
0.38 teraflops
Ryzen 9 3900XT
n/a
9000 2
Memory support
Memory type | — DDR4-2666 | — DDR4-3200 |
Max. size | 128 GB | 128 GB |
Number of channels | 2 | 2 |
Max. bandwidth | 41.6 GB/s | 47.68 GB/s |
ECC support | No | Yes |
Other
Official site | Site Intel Core i7 8700K | AMD Ryzen 9 3900XT |
PCI Express Version | 3.0 | 4.0 |
Max. PCI Express lanes | 16 | 24 |
Extended instructions | SSE4.1, SSE4.![]() |