AMD Radeon RX 6900 XT 16GB vs AMD Radeon RX 6800 16GB
The Radeon RX 6900 XT delivers 43% more FP16 throughput than the Radeon RX 6800 (46 vs 32 TFLOPS dense).
AMD Radeon RX 6900 XT 16GB
Full specs →AMD Radeon RX 6800 16GB
Full specs →Specifications
Performance (TFLOPS)
FLOPS by Precision
What actually differs
Both GPUs launched in 2020: the Radeon RX 6900 XT on RDNA 2 and the Radeon RX 6800 on RDNA 2.
Dense throughput for the Radeon RX 6900 XT against the Radeon RX 6800: FP32 23 vs 16 TFLOPS, FP16 46 vs 32 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 16 GB against 16 GB, fed at 512 GB/s versus 512 GB/s. More memory per GPU means larger models fit before you have to shard across cards, which often matters more than raw TFLOPS for inference.
Power budgets are 300 W for the Radeon RX 6900 XT and 250 W for the Radeon RX 6800. At FP32 that works out to 0.08 against 0.06 TFLOPS per watt.
For LLM training and inference, weight the FP8 and FP16 rows and memory capacity most heavily. For scientific and HPC workloads, the FP64 row is the one to read.
Frequently asked questions
Is the Radeon RX 6900 XT faster than the Radeon RX 6800?
At FP16 precision the Radeon RX 6900 XT reaches 46 TFLOPS dense against 32 TFLOPS for the Radeon RX 6800. The performance table on this page lists every published precision for both GPUs.
Which has more memory, the Radeon RX 6900 XT or the Radeon RX 6800?
Both GPUs carry 16 GB of VRAM. Memory bandwidth is 512 GB/s for the Radeon RX 6900 XT and 512 GB/s for the Radeon RX 6800.
How much power do the Radeon RX 6900 XT and the Radeon RX 6800 draw?
The Radeon RX 6900 XT is rated at 300 W TDP and the Radeon RX 6800 at 250 W. On FP32 throughput per watt, the Radeon RX 6900 XT is the more efficient part.
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