Home / Models / GPT-OSS 20B / NVIDIA GTX 1080 8 GB
Can GPT-OSS 20B run on NVIDIA GTX 1080 8 GB?
Can it run? Yes, with CPU/RAM offload. Full GPU fit? No.
Can it run?
- Can it run?
- Yes, with CPU/RAM offload. This is not equivalent to full-GPU inference.
- Full GPU fit?
- No
- Model
- GPT-OSS 20B · 22B
- GPU
- NVIDIA GTX 1080 8 GB · 8 GB advertised
Memory calculation
Breakdown for Q4 at 8K context, batch size 1. Calculator v1.0.0.
| Model weights | 12.6 GB |
|---|---|
| KV cache | 0.4 GB |
| Runtime reserve | 1.1 GB |
| Safety margin | 0.6 GB |
| Required (estimated) | 14.7 GB |
| GPU usable VRAM | 7.2 GB |
Result: CPU RAM OFFLOAD REQUIRED
Quantization table
| Quantization | 2K | 4K | 8K | 16K | 32K | 64K | 128K |
|---|---|---|---|---|---|---|---|
| BF16 | No | No | No | No | No | No | No |
| FP16 | No | No | No | No | No | No | No |
| Q3 | Offload | Offload | Offload | Offload | Offload | Offload | Offload |
| Q4 | Offload | Offload | Offload | Offload | Offload | Offload | Offload |
| Q5 | Offload | Offload | Offload | Offload | Offload | Offload | Offload |
| Q6 | Offload | Offload | Offload | Offload | Offload | Offload | Offload |
| Q8 | No | No | No | No | No | No | No |
What fits entirely in VRAM?
No calculated full-VRAM fit at the evaluated quantizations and context lengths.
What requires RAM offload?
Weights may run with CPU/RAM offload. That is not equivalent to full-GPU inference. RigForAI does not estimate tokens/sec in this release.
Available graphics cards
These SKUs use this GPU chip. Amazon CTAs appear only for EXACT/HIGH matches. Absence of a price does not change the compatibility result above.
ASUS TURBO-GTX1080-8G graphics card NVIDIA GeForce GTX 1080 8 GB GDDR5X
8 GB · Amazon EXACT
$149.97
Check price on Amazon
GIGABYTE GTX 1080 Turbo OC 8G NVIDIA GeForce GTX 1080 8 GB GDDR5X
8 GB · Amazon unmatched
GIGABYTE GV-N1080IX-8GD graphics card NVIDIA GeForce GTX 1080 8 GB GDDR5X
8 GB · Amazon unmatched
ASUS ROG STRIX-GTX1080-A8G-GAMING NVIDIA GeForce GTX 1080 8 GB GDDR5X
8 GB · Amazon unmatched
ASUS ROG STRIX-GTX1080-A8G-GAMING NVIDIA GeForce GTX 1080 8 GB GDDR5X
8 GB · Amazon unmatched
Sources
Model: official config openai/gpt-oss-20b (main). GPU/product specs: Icecat. Compatibility: RigForAI calculator v1.0.0 estimated VRAM · Q8 at 8K: DOES_NOT_FIT. Amazon: affiliate commerce match, not a spec source.