Can I Run Qwen3.8 on NVIDIA DGX Spark?
Written by Jakub Rusinowski · Last updated September 11, 2026
Yes, comfortably — Qwen3.8-Flash-Next at Q4_K_M needs 109.7 GB at 8K context (108.7 GB weights + 1 GB KV cache/overhead), leaving ~18.3 GB of the NVIDIA DGX Spark's 128 GB, at ~55 tok/s (est.), with room for up to 256K context.
See what else this hardware can run →
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 DGX Spark Specs
| VRAM | 128 GB |
| Memory Bandwidth | 273 GB/s |
Qwen3.8-Flash-Next on the NVIDIA DGX Spark: VRAM by quantization
| Quant | VRAM needed | Fits 128 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 361 GB | ✗ No | — | — |
| Q8_0 | 192.3 GB | ✗ No | — | — |
| Q6_K | 148.6 GB | ✗ No | — | — |
| Q5_K_M | 128.6 GB | ✗ No | — | — |
| Q4_K_M | 109.7 GB | ✓ Yes | 256K | — |
| Q3_K_M | 77.7 GB | ✓ Yes | 256K | — |
| Q2_K | 60.2 GB | ✓ Yes | 256K | — |
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 109.7 GB · 32K 110.3 GB · 128K 112.7 GB. Every window this model publishes still fits 128 GB.
No compatible GPU? Qwen3.8-Flash-Next on 192 GB of system RAM, CPU only: runs, but it is tight.
Qwen3.8 Sizes That Fit the NVIDIA DGX Spark (at 8K context)
| Qwen3.8-Flash-Next | Q4_K_M · 109.7 GB at 8K context · ~55 tok/s (est.) |
| Qwen3.8 27B | Q4_K_M · 18.3 GB at 8K context · ~13 tok/s (est.) |
At 2 hrs/day, buying (~$4,699) beats renting at $1.54/hr after about 4.2 years.
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
Is the NVIDIA DGX Spark enough to run Qwen3.8 locally?
Yes, comfortably — Qwen3.8-Flash-Next at Q4_K_M needs 109.7 GB at 8K context (108.7 GB weights + 1 GB KV cache/overhead), leaving ~18.3 GB of the NVIDIA DGX Spark's 128 GB, at ~55 tok/s (est.), with room for up to 256K context.
What's the best Qwen3.8 size for the NVIDIA DGX Spark?
Qwen3.8-Flash-Next at Q4_K_M quantization needs 109.7 GB at 8K context (108.7 GB weights + 1 GB KV cache/overhead), estimated ~55 tokens/sec, up to 256K context.
Every Qwen3.8 size on the NVIDIA DGX Spark
| Size | VRAM at 8K | Verdict | Speed |
|---|---|---|---|
| Qwen3.8-Max | 1457.5 GB | Does not fit | — |
| Qwen3.8-Flash-Next | 109.7 GB | Runs | ~55 tok/s |
| Qwen3.8 27B | 18.3 GB | Runs | ~13 tok/s |
Popular Models on the NVIDIA DGX Spark
VRAM Tier
Troubleshooting
Buying Guide
← Can I Run It? | Qwen3.8 Model Page | NVIDIA DGX Spark GPU Page | VRAM calculator | Check Your Hardware