Home / Models / GPT-OSS 20B / NVIDIA RTX 4070 12 GB
Can GPT-OSS 20B run on NVIDIA RTX 4070 12 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 RTX 4070 12 GB · 12 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 | 10.8 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 | Offload | Offload | Offload | Offload | Offload | Offload | Offload |
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.
GIGABYTE GV-N4070WF3OC-12GD graphics card NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon EXACT
$799.99
Check price on Amazon
ASUS Dual -RTX4070-O12G NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon EXACT
$699.22
Check price on Amazon
GIGABYTE GAMING GV-N4070GAMING OC-12GD graphics card NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon EXACT
$669.22
Check price on Amazon
GIGABYTE EAGLE GV-N4070EAGLE OC-12GD graphics card NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon EXACT
$1150.00
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MSI VENTUS GEFORCE RTX 4070 3X 12G graphics card NVIDIA 12 GB GDDR6X
12 GB · Amazon EXACT
$599.99
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MSI VENTUS GEFORCE RTX 4070 3X E 12G OC graphics card NVIDIA 12 GB GDDR6X
12 GB · Amazon EXACT
$1727.53
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MSI VENTUS GEFORCE RTX 4070 3X 12G OC graphics card NVIDIA 12 GB GDDR6X
12 GB · Amazon EXACT
Check price on Amazon
MSI GAMING GEFORCE RTX 4070 X SLIM 12G graphics card NVIDIA 12 GB GDDR6X
12 GB · Amazon EXACT
Check price on Amazon
GIGABYTE AERO GV-N4070AERO OC-12GD graphics card NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon EXACT
Check price on Amazon
MSI VENTUS GeForce RTX 4070 2X Grafikk NVIDIA 12 GB GDDR6X
12 GB · Amazon unmatched
ASUS TUF Gaming TUF-RTX4070-O12G-GAMING NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon unmatched
MSI VENTUS GeForce RTX 4070 2X E 12G OC NVIDIA 12 GB GDDR6X
12 GB · Amazon unmatched
ASUS Dual -RTX4070-O12G-WHITE NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon unmatched
ASUS ProArt-RTX4070-O12G NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon unmatched
ASUS Dual -RTX4070-O12G-EVO NVIDIA GeForce RTX 4070 12 GB GDDR6X
12 GB · Amazon unmatched
GIGABYTE AORUS GeForce RTX 4070 MASTER 12G NVIDIA 12 GB GDDR6X
12 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: CPU_RAM_OFFLOAD_REQUIRED. Amazon: affiliate commerce match, not a spec source.