inference/research
draftlow · 0.60updated 2026-10-15

NVIDIA GB10 Grace Blackwell (DGX Spark)

nvidia blackwell + grace (GB10) 2025
This record is a draft. Not yet verified. Provisional. Treat every number on this page as provisional.

Fields

id
accelerators/nvidia-gb10
Vendor
nvidia
Architecture
blackwell + grace (GB10)
Release year
2025
Form factors
socs
VRAM (GB)
128
Memory type
lpddr5x unified
Memory bus (bit)
256
Memory bandwidth (GB/s)
273
Bandwidth basis
vendor spec table value as printed in cited source
TDP (W)
140
Unified memory
yes
Consumer part
yes
notes
DGX Spark superchip: Blackwell GPU + Grace CPU, 128 GB coherent LPDDR5x at 273 GB/s, ConnectX-7, FP4 tensor focus. Direct competitor to Strix Halo at ~4x the price; decode essentially tied with Strix Halo in lhl's gpt-oss-120b sweep while prefill is 2-7x faster.

Notes

DGX Spark superchip: Blackwell GPU + Grace CPU, 128 GB coherent LPDDR5x at 273 GB/s, ConnectX-7, FP4 tensor focus. Direct competitor to Strix Halo at ~4x the price; decode essentially tied with Strix Halo in lhl's gpt-oss-120b sweep while prefill is 2-7x faster.

Cross-references

This record references no other records — it is a leaf. It is cited by 76.