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AMD FX-8100 vs AMD Ryzen 9 7900
Last updated:
Benchmarks
Performance Overview
Average performance across multiple benchmarks
Single-core performance
Multi-core performance
Cinebench R20 Single-Core
Single-core performance
AMD FX-8100
21 %
8C / 8T · 3.70 GHz
AMD Ryzen 9 7900
100 %
12C / 24T · 5.40 GHz
Cinebench R20 Multi-Core
Multi-core performance
AMD FX-8100
7 %
8C / 8T · 3.70 GHz
AMD Ryzen 9 7900
100 %
12C / 24T · 4.70 GHz
More benchmarks
Cinebench 2026 (ST)
218 entries
218 entries
Cinebench 2026 (MC)
219 entries
219 entries
Cinebench 2024 (SC)
427 entries
427 entries
Cinebench 2024 (MC)
422 entries
422 entries
Cinebench R23 (SC)
690 entries
690 entries
Cinebench R23 (MC)
665 entries
665 entries
Geekbench 6 (SC)
1,989 entries
1,989 entries
Geekbench 6 (MC)
1,927 entries
1,927 entries
Cinebench R20 (SC)
666 entries
666 entries
Geekbench 5 (SC)
2,512 entries
2,512 entries
Cinebench R20 (MC)
615 entries
615 entries
Geekbench 5 (MC)
2,483 entries
2,483 entries
FP32 SP (iGPU)
2,219 entries
2,219 entries
3DMark Timespy (iGPU)
534 entries
534 entries
PassMark CPU-Mark
2,504 entries
2,504 entries
Cinebench R15 (SC)
1,113 entries
1,113 entries
Cinebench R15 (MC)
1,110 entries
1,110 entries
Geekbench 3 (SC)
945 entries
945 entries
Geekbench 3 (MC)
941 entries
941 entries
Cinebench R11.5 (SC)
826 entries
826 entries
Cinebench R11.5 (MC)
837 entries
837 entries
CPU performance per watt (efficiency)
140 entries
140 entries
Specifications
At a glance
|
Wischen
|
AMD FX-8100 | AMD Ryzen 9 7900 |
|---|---|---|
| Family | AMD FX (30) | AMD Ryzen 9 (43) |
| CPU group | AMD FX-8000 (11) | AMD Ryzen 7000 (18) |
| Architecture | Vishera (Bulldozer) | Raphael (Zen 4) |
| Technology | 32 nm | 5 nm |
| Segment | Desktop | Desktop |
| Socket | AM3+ | AM5 (LGA 1718) |
| Predecessor | AMD Ryzen 9 5900 | |
| Successor |
CPU Cores and Base Frequency
|
Wischen
|
AMD FX-8100 | AMD Ryzen 9 7900 |
|---|---|---|
| CPU Cores / Threads | 8 / 8 | 12 / 24 |
| Hyperthreading / SMT | ✗ | ✓ |
| Core architecture | normal | normal |
| Cores: | 8x | 12x Zen 4 |
| Frequency: | 2.80 GHz | 3.70 GHz |
| Turbo (1 Core): | 3.70 GHz | 5.40 GHz |
| Turbo (All Cores): | 3.70 GHz | 4.70 GHz |
| L2-Cache | 12.00 MB | |
| L3-Cache | 8.00 MB | 64.00 MB |
| Overclocking | ✓ | ✓ |
Integrated graphics (iGPU)
|
Wischen
|
AMD FX-8100 | AMD Ryzen 9 7900 |
|---|---|---|
| GPU name | no iGPU | AMD Radeon Graphics (Raphael) |
| GPU frequency | 0.40 - 2.20 GHz | |
| CUs / Shader | / | 2 / 128 |
| Raytracing | ✗ | ✗ |
| Max. displays | 3 | |
| Max. GPU Memory | 8 GB | |
| Technology | 5 nm | |
| Release date | Q3/2022 |
NPU AI performance
|
Wischen
|
AMD FX-8100 | AMD Ryzen 9 7900 |
|---|---|---|
| AI hardware | ||
| AI specifications | ||
| NPU + CPU + iGPU |
Memory & PCIe
|
Wischen
|
AMD FX-8100 | AMD Ryzen 9 7900 |
|---|---|---|
| Memory | DDR3-1866 (29.9 GB/s) | DDR5-5200 (83.2 GB/s) |
| Max. Memory | 128 GB | |
| Memory channels | 2 | 2 |
| ECC | Yes | Yes |
| PCIe | 5.0 x 24 | |
| PCIe Bandwidth | 94.5 GB/s |
Thermal Management
|
Wischen
|
AMD FX-8100 | AMD Ryzen 9 7900 |
|---|---|---|
| TDP | 95 W | 65 W |
| TDP (PL2) | 88 W | |
| TDP up | 170 W | |
| TDP down | ||
| T. junction max. | 95 °C |
Technical details
|
Wischen
|
AMD FX-8100 | AMD Ryzen 9 7900 |
|---|---|---|
| Chip design | Unknown | Chiplet |
| AES-NI | ✓ | ✓ |
| Operating systems | Windows 10, Linux | Windows 10, Windows 11, Linux |
| Instruction set | x86-64 (64 bit) | x86-64 (64 bit) |
| ISA extensions | SSE4.1, SSE4.2, AVX, FMA3, FMA4 | SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 |
| Release date | Q4/2011 | Q1/2023 |
| Release price | 429 $ | |
| Documents | Technical data sheet |
User Reviews
Your rating
Here you can rate one or both of the processors. The average rating of AMD FX-8100 is 5.0 stars (4 ratings), while AMD Ryzen 9 7900 has received 3.1 stars (327 ratings).
Click on the stars to rate one or both processors.
Most popular CPUs in both categories
1
AMD FX-8100
8C / 8T · 3.70 GHz
2
Apple M3 Ultra (28-CPU 60-GPU)
28C / 28T · 4.06 GHz
3
Apple M3 Ultra (32-CPU 80-GPU)
32C / 32T · 4.06 GHz
4
Intel Celeron 450
1C / 1T · 0.00 GHz
5
Intel Core Ultra 7 270K Plus
24C / 24T · 5.50 GHz
6
Intel Core i5-13600KF
14C / 20T · 5.10 GHz
7
AMD Ryzen 7 5800XT
8C / 16T · 4.80 GHz
8
Intel Xeon E5-2680 v4
14C / 28T · 3.30 GHz
9
AMD Ryzen 9 7900
12C / 24T · 5.40 GHz
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