GeForce RTX 4090 · Qwen3.8 27B · UD-Q4_K_M
Yes. A GeForce RTX 4090 runs Qwen3.8 27B at UD-Q4_K_M with room left at 8,192 tokens, roughly 32–49 tokens per second.
| Piece | Value | Note |
|---|---|---|
| Weights | 15.3 GiB | Qwen3.8-27B-UD-Q4_K_M.gguf |
| KV cache | 0.65 GiB | 8,192 tokens |
| Engine overhead | 0.50 GiB | Flat 0.5 GiB allowance |
| 5% headroom | 0.82 GiB | On the sum above |
| Total | 17.3 GiB | Fits |
| Fast memory | 24.0 GiB | 24 GB VRAM |
| Speed | 32–49 tok/s | Dense bandwidth range |
GeForce RTX 4090 · Qwen3.8 27B ·GGUF file · Methodology
FAQ
How was this fit calculated?
Weights 15.3 GiB, KV cache 0.65 GiB at 8,192 tokens, engine overhead 0.50 GiB, then 5% headroom, for 17.3 GiB. Fast memory available is 24.0 GiB.
What if I change the quant or the context?
This page is UD-Q4_K_M at 8,192 tokens. A smaller quant or a shorter context lowers the total. The homepage calculator changes both without a new page.
Can I trust the tokens per second?
The range 32–49 tok/s is a bandwidth roofline, 55% to 80% efficient. This dense model reads the whole weight file each token. Measure your own box before you buy around it.
Is GeForce RTX 4090 assumed to have extra RAM?
Yes. Discrete GPU pages assume 32 GB of system RAM. Offload uses whatever remains after 8 GB for Windows, and it is limited by the slower of DDR5-5600 and the PCIe link.