AMD Radeon RX 6650 XT 8GB vs AMD Radeon RX 6900 XT 16GB
The Radeon RX 6900 XT delivers 2.1x the FP16 throughput of the Radeon RX 6650 XT (46 vs 22 TFLOPS dense). The Radeon RX 6900 XT also carries 8 GB more memory (16 GB vs 8 GB).
AMD Radeon RX 6650 XT 8GB
Full specs →AMD Radeon RX 6900 XT 16GB
Full specs →Specifications
Performance (TFLOPS)
FLOPS by Precision
What actually differs
The Radeon RX 6650 XT is the newer part: RDNA 2, launched in 2022, against the Radeon RX 6900 XT's RDNA 2 from 2020. Newer architectures typically add lower-precision formats and better throughput per watt, so check the precision rows your workload actually uses.
Dense throughput for the Radeon RX 6650 XT against the Radeon RX 6900 XT: FP32 11 vs 23 TFLOPS, FP16 22 vs 46 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 8 GB against 16 GB, fed at 280 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 180 W for the Radeon RX 6650 XT and 300 W for the Radeon RX 6900 XT. At FP32 that works out to 0.06 against 0.08 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 6650 XT faster than the Radeon RX 6900 XT?
At FP16 precision the Radeon RX 6900 XT reaches 46 TFLOPS dense against 22 TFLOPS for the Radeon RX 6650 XT. The performance table on this page lists every published precision for both GPUs.
Which has more memory, the Radeon RX 6650 XT or the Radeon RX 6900 XT?
The Radeon RX 6900 XT carries 16 GB of VRAM versus 8 GB for the Radeon RX 6650 XT. Memory bandwidth is 280 GB/s for the Radeon RX 6650 XT and 512 GB/s for the Radeon RX 6900 XT.
How much power do the Radeon RX 6650 XT and the Radeon RX 6900 XT draw?
The Radeon RX 6650 XT is rated at 180 W TDP and the Radeon RX 6900 XT at 300 W. On FP32 throughput per watt, the Radeon RX 6900 XT is the more efficient part.
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