Unverified50% confidenceFactExact time
RTX 4090搭载的GDDR6X显存由美光（Micron）开发，采用PAM4信号编码，带宽超过1000 GB/s（1008 GB/s）
1
Sources
50%
Confidence
Long-term
Relevance
7/12/2026
First Seen
Sources
4090跑Qwen3 27B为何这么慢？本地推理性能优化实战
redditr/ollama7/10/2026
Related Claims
UnverifiedRTX 4090的GDDR6X显存接口带宽高达1008 GB/s82% similarVerifiedRTX A6000基于Ampere架构，搭载10496个CUDA核心与48GB GDDR6显存，带宽768 GB/s，FP32算力38.7 TFLOPS78% similarUnverifiedRTX 5080配备16GB GDDR7显存73% similarVerifiedRTX 4090的理论FP16算力为82.6 TFLOPS，显存带宽为1008 GB/s73% similarUnverified移动端LPDDR5X内存带宽约77 GB/s，远低于RTX 4090的1008 GB/s73% similar
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