NVIDIA RTX 2080 Ti 22GB (modded) vs NVIDIA RTX 3090 for local LLMs
7 reports on the NVIDIA RTX 2080 Ti 22GB (modded) and 165 on the NVIDIA RTX 3090
Which is faster for local LLMs?
On Qwen3.6 35B · 3B active at 4-bit, the NVIDIA RTX 2080 Ti 22GB (modded) runs at 69.0 tokens per second (one run) and the NVIDIA RTX 3090 at 101.7 (one run). Those are community reports whose engines and settings differ, so the gap is a rough sign, not a controlled measure of the two cards. Memory bandwidth, which caps how fast a card can write, is 1.5x higher on the NVIDIA RTX 3090 (616 GB/s on the NVIDIA RTX 2080 Ti 22GB (modded), 936 on the NVIDIA RTX 3090).
- Memory
- 22GB
- Memory bandwidth
- 616 GB/s
- FP16 compute
- 108 TFLOPS
- Reports
- 7
- Memory
- 24GB
- Memory bandwidth
- 936 GB/s
- FP16 compute
- 142 TFLOPS
- Reports
- 165
Measured on both
Median tokens per second from plain runs (one device, one request, no speculative decoding, the whole model in the device's memory) of the same model size at the same quant level. Engines and context lengths can still differ between the runs. How to read these
| Model | NVIDIA RTX 2080 Ti 22GB (modded) | NVIDIA RTX 3090 |
|---|---|---|
| Qwen3.6 35B · 3B active4-bit | 69.0one run | 101.7one run |
Estimated by the calculator
The quant the calculator recommends for each card and its estimated speed at a 32,768-token context with 32 GB of system RAM, from memory bandwidth and the model's shape. Where a model was also measured above, the measurement wins.
| Model | NVIDIA RTX 2080 Ti 22GB (modded) | NVIDIA RTX 3090 |
|---|---|---|
| Qwen3.6 35B · 3B active | 93.6 t/sQ3_K_M | 120.1 t/sQ4_K_S |
| Qwen3.8 27B | 25.1 t/sQ4_K_S | 33.9 t/sQ4_K_M |
| Qwen3.8 125B · 6B active | 18.6 t/sQ2_K, experts in RAM | 19.4 t/sQ2_K, experts in RAM |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 27B | 25.1 t/sQ4_K_S | 33.9 t/sQ4_K_M |
| Gemma 4 26B · 4B active | 56.6 t/sQ4_K_M | 76.4 t/sQ5_K_S |
| DeepSeek V4.1 Flash 552B · 16B active | doesn't fit at these settings | doesn't fit at these settings |
Change the context, RAM or model in the calculator: NVIDIA RTX 2080 Ti 22GB (modded) · NVIDIA RTX 3090
Every report on each card, with its source: NVIDIA RTX 2080 Ti 22GB (modded) · NVIDIA RTX 3090