Intel Core i7 7800X vs AMD Ryzen 9 3900XT
We compared two desktop CPUs: the 3.5 GHz Intel Core i7 7800X with 6-cores against the 3.8 GHz AMD Ryzen 9 3900XT with 12-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.
Review
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
Advantages of Intel Core i7 7800X
- Supports quad-channel memory
- Around 31.79 GB/s (67%) higher theoretical memory bandwidth
Advantages of AMD Ryzen 9 3900XT
- Has 56 MB larger L3 cache size
- Newer - released 3-years and 2-months later
- More modern manufacturing process – 7 versus 14 nanometers
- Has 6 more physical cores
- Consumes up to 25% less energy than the Core i7 7800X – 105 vs 140 Watt
- Newer PCI Express version – 4.0
- 18% higher Turbo Boost frequency (4.7 GHz vs 4 GHz)
- 22% faster in a single-core Geekbench v5 test - 1309 vs 1075 points
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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Specifications
General
| Vendor | Intel | AMD |
| Released | May 30, 2017 | July 7, 2020 |
| Type | Desktop | Desktop |
| instruction set | x86-64 | x86-64 |
| Codename | Skylake | Zen 2 |
| Model number | i7-7800X | - |
| Socket | LGA-2066 | AM4 |
| Integrated GPU | No | No |
Performance
| Cores | 6 | 12 |
| Threads | 12 | 24 |
| Base Frequency | 3.5 GHz | 3.8 GHz |
| Turbo Boost Frequency | 4 GHz | 4.7 GHz |
| Bus frequency | 100 MHz | 100 MHz |
| Multiplier | 35x | 38x |
| Bus Bandwidth | 8 GT/s | - |
| L1 Cache | 64K (per core) | 64K (per core) |
| L2 Cache | 1MB (per core) | 512K (per core) |
| L3 Cache | 8MB (shared) | 64MB (shared) |
| Unlocked Multiplier | Yes | Yes |
Power
| Transistors | - | 3.8 billions |
| Fabrication process | 14 nm | 7 nm |
| TDP | 140 W | 105 W |
| Max. temperature | 100°C | 95°C |
Memory support
| Memory types | DDR4-2400 | DDR4-3200 |
| Memory Size | 128 GB | 128 GB |
| Max. Memory Channels | 4 | 2 |
| Max. Memory Bandwidth | 79.47 GB/s | 47.68 GB/s |
| ECC Support | No | Yes |
Misc
| Official site | Intel Core i7 7800X official page | AMD Ryzen 9 3900XT official page |
| PCI Express Version | 3.0 | 4.0 |
| PCI Express Lanes | 28 | 24 |
| Extended instructions | SSE4.1, SSE4.2, AVX-2, AVX-512 | - |
Cast your vote
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