Can I Run Command R (35B) on NVIDIA DGX Spark?
Written by Jakub Rusinowski · Last updated July 21, 2026
Yes. Command R (35B) needs 32.7 GB at 8K context (21.1 GB weights + 11.6 GB KV cache/overhead) at Q4_K_M and the NVIDIA DGX Spark has 128 GB, leaving about 95.3 GB of headroom, at roughly 9 tok/s (estimated) with room for up to 64K of context.
See what else this hardware can run →
The numbers
| Model | Command R (35B) |
| Parameters | 35B |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 32.7 GB |
| NVIDIA DGX Spark VRAM | 128 GB |
| Verdict | Runs |
| Max context | 64K |
| Estimated speed | ~9 tok/s |
Command R (35B) on the NVIDIA DGX Spark: VRAM by quantization
| Quant | VRAM needed | Fits 128 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 81.5 GB | ✓ Yes | 32K | — |
| Q8_0 | 48.7 GB | ✓ Yes | 64K | — |
| Q6_K | 40.2 GB | ✓ Yes | 64K | — |
| Q5_K_M | 36.3 GB | ✓ Yes | 64K | — |
| Q4_K_M | 32.7 GB | ✓ Yes | 64K | — |
| Q3_K_M | 26.5 GB | ✓ Yes | 64K | — |
| Q2_K | 23 GB | ✓ Yes | 64K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 128 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 Q4_K_M on the NVIDIA DGX Spark: 8K 32.7 GB · 32K 64.9 GB · 125K 189.7 GB ✗. Past 125K it no longer fits 128 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Nothing to change — run it at Q4_K_M. If you want more capability, check whether the next size up also fits.
No compatible GPU? Command R Family on 256 GB of system RAM, CPU only: runs, but too slowly to be worth it.
Running Command R (35B) on this card:
At 2 hrs/day, buying (~$4,699) beats renting at $0.55/hr after about 11.9 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
Other Command R Family sizes on the NVIDIA DGX Spark
- Command R+ (104B) — runs (65.7 GB)
Command R (35B) on nearby hardware
- NVIDIA RTX PRO 6000 Blackwell (96 GB) — runs
All Command R Family sizes on the NVIDIA DGX Spark | Command R (35B) model page | NVIDIA DGX Spark GPU page | VRAM calculator | Check your hardware