CPU bottleneck check, compatible CPUs, and AI models it can run
GeForce GTX 1660 / NVIDIA made / GTX 16 / Released 2019 Also known as: GTX1660 / 1660
GeForce GTX 1660 (NVIDIA, released in 2019, also listed as GTX1660 / 1660) is a graphics card with a performance score of 9,900 and 6GB of VRAM, TDP 120W. If CPU compatibility and performance balance are poor, a CPU bottleneck occurs, preventing GTX 1660 from reaching its full potential. In our estimate, the CPUs that pair best with GTX 1660 are Intel: Core i7-3770K (estimated bottleneck: about 0%), and AMD: AMD FX-8350 (about 0%). Below are the top 10 compatible CPUs, CPUs to avoid, and generative AI models supported by this amount of VRAM.
CPUs are ordered by proximity to the ideal CPU:GPU ratio of 0.9:1. A lower bottleneck percentage means more of the GPU’s performance can be used.
The Bottleneck Checker opens with GeForce GTX 1660 already selected.
GTX 1660 (GTX1660 / 1660) has a performance score of 9,900 points. Using the same CPU:GPU ≈ 0.9:1 standard as the checker, compatibility by CPU score is shown below.
| Example CPUs to Pair | Rating | What It Means |
|---|---|---|
| Core i7-6700、Core i7-4790、AMD FX-9590 | Great Match: 10% or Less | Optimal balance. Nearly all of GTX 1660 performance can be used |
| Ryzen 3 1300X、Core i5-5675C、Core i5-4690 | Acceptable: 10–25% | Practical with no major issue. Consider a future upgrade if targeting high fps. |
| Ryzen 3 1200、Core i3-7350K、Core i5-6400 | CPU Too Weak: Over 25% | A clear CPU bottleneck. Much of the GPU performance is wasted |
| Ryzen 7 1800X、Ryzen 5 1600X、Ryzen 5 2600 | CPU Overkill | Likely overkill for gaming |
Note: Perceived results vary by resolution and game (GPU matters more at 4K, while CPU matters more at high-fps Full HD). For an exact estimate, use the Bottleneck Checker.
Runs Comfortably: Meets recommended VRAM / Barely Runs: Meets minimum VRAM (lower quality or quantization may be needed)
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→ Compare Other Models / → Check Whether an Upgrade Is Worthwhile
In our estimate, the best-balanced options are Core i7-3770K for Intel (estimated bottleneck: about 0%) and AMD FX-8350 for AMD (about 0%). A CPU-to-GPU performance ratio near 0.9:1 tends to use both parts effectively. See the top 10 compatible CPUs in the table on this page.
As a guide, CPUs such as Ryzen 3 1200、Core i3-7350K、Core i5-6400、AMD FX-6300 push the bottleneck above 25% and waste much of the GeForce GTX 1660 performance. On the other hand, CPUs such as Ryzen 7 1800X、Ryzen 5 1600X、Ryzen 5 2600 are likely overkill for gaming.
GeForce GTX 1660 has 6GB of VRAM. It can comfortably run about 33 models, including Stable Diffusion and LLMs (for example, SD 1.5 (Q4 quantized), Stable Diffusion 1.5, SDXL (Q4 quantized)).
GeForce GTX 1660 has a power draw (TDP) of 120W. Choose a power supply that covers the GPU TDP plus CPU and other component power draw, with additional headroom. Check the actual CPU pairing balance in the bottleneck diagnosis above.
Its performance score is 9,900 points. CPU balance matters for gaming, while VRAM (6GB) matters for generative AI. Use the top 10 CPU list and AI model list above to check your use case.
