Can I Run Cosmos 3 on NVIDIA GeForce RTX 3070 Ti?
Written by Jakub Rusinowski · Last updated September 29, 2026
Only with offload — Cosmos 3 Edge at BF16 needs 9.7 GB at 8K context (8 GB weights + 1.7 GB KV cache/overhead) against the NVIDIA GeForce RTX 3070 Ti's 8 GB, so part of it spills onto CPU/system RAM and speed drops sharply.
Get a personalized upgrade path →
or compare on Vast.ai from $0.35/hr (typical low · varies)
As an Amazon Associate we earn from qualifying purchases. Cloud GPU links are referral links — we may earn a commission at no extra cost to you.
NVIDIA GeForce RTX 3070 Ti Specs
| VRAM | 8 GB |
| Memory Bandwidth | 608 GB/s |
Cosmos 3 Edge on the NVIDIA GeForce RTX 3070 Ti: VRAM by quantization
| Quant | VRAM needed | Fits 8 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 9.7 GB | ✗ No | — | — |
| Q8_0 | 6 GB | ✓ Yes | 16K | — |
| Q6_K | 5 GB | ✓ Yes | 16K | — |
| Q5_K_M | 4.5 GB | ✓ Yes | 16K | — |
| Q4_K_M | 4.1 GB | ✓ Yes | 16K | — |
| Q3_K_M | 3.4 GB | ✓ Yes | 16K | — |
| Q2_K | 3 GB | ✓ Yes | 16K | — |
Assumes an 8K-token context with an f16 KV cache, on an estimated architecture — this model publishes no config we can read. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 8 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At BF16 on the NVIDIA GeForce RTX 3070 Ti: 8K 9.7 GB ✗ · 16K 10.6 GB ✗. Past 8K it no longer fits 8 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Cosmos 3 Edge on 8 GB of system RAM, CPU only: runs, but it is tight.
Why It Does Not Fit
Every Cosmos 3 variant requires more VRAM than the NVIDIA GeForce RTX 3070 Ti provides (8 GB).
Nearest GPU That Fits
NVIDIA GeForce RTX 3080 (10GB) (10 GB VRAM).
Cosmos 3 needs ~10 GB but this GPU has 8 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
Affiliate links — we may earn a commission if you sign up, at no extra cost to you.
Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
FAQ
Cosmos 3 on the NVIDIA GeForce RTX 3070 Ti — does it fit?
Only with offload — Cosmos 3 Edge at BF16 needs 9.7 GB at 8K context (8 GB weights + 1.7 GB KV cache/overhead) against the NVIDIA GeForce RTX 3070 Ti's 8 GB, so part of it spills onto CPU/system RAM and speed drops sharply.
What GPU should I get instead to run Cosmos 3?
The NVIDIA GeForce RTX 3080 (10GB) (10 GB VRAM) is the cheapest upgrade that fits it.
Every Cosmos 3 size on the NVIDIA GeForce RTX 3070 Ti
| Size | VRAM at 8K | Verdict | Speed |
|---|---|---|---|
| Cosmos 3 Super | 131.1 GB | Does not fit | — |
| Cosmos 3 Nano | 34.2 GB | Runs at Q2_K | — |
| Cosmos 3 Edge | 9.7 GB | Runs at Q8_0 | — |
Cosmos 3 on Other GPUs
- Cosmos 3 on NVIDIA GeForce RTX 5060 Ti 8GB
- Cosmos 3 on NVIDIA GeForce RTX 5060
- Cosmos 3 on NVIDIA GeForce RTX 4060
- Cosmos 3 on NVIDIA GeForce RTX 3070
- Cosmos 3 on AMD Radeon RX 9060 XT 8GB
Popular Models on the NVIDIA GeForce RTX 3070 Ti
- DeepSeek R1 on NVIDIA GeForce RTX 3070 Ti
- Qwen 3 on NVIDIA GeForce RTX 3070 Ti
- Qwen 2.5 Family on NVIDIA GeForce RTX 3070 Ti
VRAM Tier
Troubleshooting
- Ollama: "model requires more system memory than is available"
- Out of memory at long context (the KV cache, not the weights)
Buying Guide
← Can I Run It? | Cosmos 3 Model Page | NVIDIA GeForce RTX 3070 Ti GPU Page | VRAM calculator | Check Your Hardware