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Builds / Nvidia GB10 (unified)

1x DGX Spark (GB10, 2,200 MHz cap): Qwen3.8 27B NVFP4 at 26.7 tok/s code / 1,188 prefill (vLLM)

Last updated:

Source: measuredlocally.com ↗📏 How measured: reported by the original source; RigBase re-checked the numbers at that source
GPU(s)
Nvidia GB10 (unified)
VRAM / unified memory (GB)
128
CPU
NVIDIA GB10 (20-core Arm)
Amazon · eBay (used) · Newegg
Motherboard
NVIDIA DGX Spark
Amazon · eBay (used) · Newegg
RAM
128 GB unified memory
PSU
not stated
Other
NVIDIA DGX OS; vLLM 0.1.dev20003, tensor parallel 1; graphics chip power-capped at 2,200 MHz
Reported total cost
not stated
Power
GB10 capped at 2,200 MHz (author: peak GPU power fell from 55.5 W to 43.3 W in an August check on one box)

Measured speed (generation tokens/sec)

ModelQuantEnginetok/sPrompt processing (tok/s)Details
Qwen3.8 27BNVFP4 (Unsloth, 4-bit, 23.4 GB on disk)vLLM 0.1.dev20003, MTP n=3, FP8 KV, 351K context26.71,188 @ 19,000-token prompt
est. TTFT @8k ≈ 6.9 s (calculated from measured prefill)		⚡ spec-decode (MTP)context: code prompt, thinking off; 351,232-token window configured📏 measuredlocally test: one user, thinking off, same code prompt on every machine; middle of three runs (idle machine, 8 quiet seconds before each run); graphics chips capped at 2,200 MHz (about 2,400 uncapped) to cut power use — author's August check: writing within 1%, reading 2–4% slower; middle of three code runs 25.9–27.1 tok/s; prose 16.9 (16.8–17.3); 4 users at once: 60.9 tok/s in total

Prompt processing = prefill speed (how fast the prompt is read) as reported by the source, with the prompt length it was measured at; blank = the source does not report it. est. TTFT @8k is calculated from the measured prefill speed (8,192 ÷ prefill tok/s), shown only when prefill was measured on a prompt of 512+ tokens. It is not a measurement and ignores load time and caching. measured TTFT is the source's own time-to-first-token. Why prefill matters for coding assistants.

measuredlocally.com hardware leaderboard (Alex, UK), Qwen3.8 27B row for one DGX Spark, tested 11 Oct 2026. Power-capped; MTP on (3 tokens drafted). Same author's two-Spark and four-Spark rows are separate builds.

Source: https://measuredlocally.com/hardware-leaderboard.html

Blank fields = not stated in the source. We never estimate build data; GPU street prices above are separately sourced and dated.

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Quick answers: Can DGX Spark (GB10) run Qwen3.8 27B?

Speculative-decoding rows on this page are not like-for-like with plain decode. See how much MTP and DFlash really speed things up (measured pairs).