Unverified50% confidenceBenchmarkExact time

GPU video memory (VRAM) bandwidth is typically on the order of 500–1,000 GB/s, whereas DDR5 system memory bandwidth is only approximately 50–80 GB/s, a difference of more than 10x.

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

9/5/2026

First Seen

Valid until: 12/4/2026

Sources

Qwen3 27B Local Testing: How Does It Actually Perform with 16GB VRAM?

Related Entities

GPU显存concept DDR5concept

Related Claims

VerifiedThe typical bandwidth of DDR5 memory ranges from 50 to 80 GB/s80% similar UnverifiedThe VRAM memory bus width of NVIDIA's high-end graphics cards can reach 5120-bit77% similar UnverifiedGPU HBM bandwidth is typically on the order of 2–3 TB/s (3.35 TB/s for H100), while the effective bandwidth of Host DRAM connected via PCIe 5.0 is only about 64 GB/s—a difference of nearly 50x.76% similar

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