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HBM
WebGPUEnterprise

Memory verified.

Measured 28 September 2026 at 18:41 UTC on Chrome 153, Windows by OP-380819.

MEM Score82.0
Percentile
Calibrating
1 of 5 class runs needed. Top 25 % overall
Device class
RX 6900 XT
GDDR6, 256-bit, 512 GB/s peak
Read502.8GB/s98 % of published peak
Write464.0GB/s
Copy426.9GB/s
Random access76.4 GB/s4.78 G reads/s
Latency proxy245 ns
Sustain426.9 GB/s100 % held over 18 s
AI decode ceiling

126tokens/s, 8B model at 4-bit

14 tokens/s at 70B, if it fits. Upper bound

READWRITECOPYSUSTAINMEMPRINT / 828543
Memprint: drawn from this run's measurements only.
Timing
GPU timestamps
Working set
2 × 256 MiB
Data moved
15.3 TB
Duration
48.0 s
Stack position
Layer 003, die 31 of 64
Run
6r343yg8xe
Test your memoryFind it in The StackRX 6900 XT