RTX 4090D 24GB (China) vs Titan X Pascal 12GB for Local LLMs
The RTX 4090D 24GB (China) has about 110% more memory bandwidth (1,008 vs 480 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 110% faster on the RTX 4090D 24GB (China). The RTX 4090D 24GB (China) fits more of the catalog at Q4/8K — 35 vs 18 of 69 models (24 vs 12 GB VRAM). Largest model that fits the RTX 4090D 24GB (China) but not the Titan X Pascal 12GB: Qwen3.6-35B-A3B (36.0B). MSRP is $1,599 for the RTX 4090D 24GB (China) vs $1,200 for the Titan X Pascal 12GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. Not retail-shoppable: RTX 4090D 24GB (China) (datacenter-class; cloud rental is the realistic way to use it). In the Q4/8K head-to-head below (41 shared models), the RTX 4090D 24GB (China) posts the higher tok/s in 37 rows vs 4. Methodology.