Can RTX 5090 run GLM-5.3 Flash?
Partly: part of the model runs from system RAM (CPU offload, per the source). Measured 30.1 tok/s generation with part of the model offloaded to system RAM (Project Maya 1.1.21, EXL3 3.05 bpw, MTP drafting, experts offloaded to RAM; source).
Every measured result for GLM-5.3 Flash on RTX 5090
| Build | Quant / setup | Engine | tok/s | |
|---|---|---|---|---|
| Ryzen 9 9950X3D + RTX 5090 + 128 GB DDR5: four big MoEs with experts offloaded to RAM (Qwen3.8 Flash-Next 78.8 tok/s) | EXL3 3.05 bpw, MTP drafting, experts offloaded to RAM | Project Maya 1.1.21 | 30.1 CPU offload | source |
Memory: RTX 5090 has 32 GB. GLM-5.3 Flash weights are about 195.8 GB at Q4_K_M (320B params × 4.89 bits ÷ 8, before context/KV cache). Arithmetic, not a measurement; long contexts need more. Check other quants in the VRAM calculator.
Speeds are decode (generation) tokens/sec as reported by each source; quant, engine and context differ, so small gaps are noise.
All measured speeds for GLM-5.3 Flash: best home rig for GLM-5.3 Flash.
GLM-5.3 Flash on other hardware: 2x DGX Spark (GB10) · 4x DGX Spark (GB10)
Other models measured on RTX 5090: DeepSeek V4.1 Flash · Gemma 4 12B · Gemma 4 26B-A4B · Gemma 4 31B · Nemotron 3.5 Bolt 74B-A9B · Ornith 1.5 122B · Qwen3.5 9B · Qwen3.6 27B · Qwen3.6 35B-A3B · Qwen3.8 27B · Qwen3.8 Flash-Next · gpt-oss 20B
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