NVIDIA · 141 GB HBM3e · 4800 GB/s bandwidth ·
Z.ai · 31.2B (active 3B) · MoE · model ctx up to 198K
Yes — the H200 141GB SXM5 (141 GB HBM3e) can run GLM-4.7-Flash. At Q4 with the default 8K context it needs ≈ 18.76 GB VRAM (weights 17.16 GB + KV cache 0.6 GB + 1 GB runtime overhead), which fits within 141 GB. Decode at Q4/8K: ≈ 1018.2 tok/s (estimated, batch 1). FP16 (≈ 64.0 GB) also fits, at ≈ 280.0 tok/s (estimated). Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology.
Fit & speed by quant and context
Quant
Context
VRAM needed
Fits?
tok/s (decode)
Q4
4K
18.46 GB
Yes
1018.2est.
Q4
8K default
18.76 GB
Yes
1018.2est.
Q4
32K
20.56 GB
Yes
1018.2est.
FP16
4K
63.7 GB
Yes
280.0est.
FP16
8K default
64.0 GB
Yes
280.0est.
FP16
32K
65.8 GB
Yes
280.0est.
Fits = weights + KV(ctx) + 1 GB overhead ≤ 95% of VRAM. Measured
anchors are context-agnostic; the fit verdict is recomputed per context. A missing tok/s
means the model is far beyond this card (offload-only territory).