AMD Radeon RX Vega 56 8GB vs AMD Radeon RX Vega 64 8GB
The Radeon RX Vega 64 delivers 20% more FP16 throughput than the Radeon RX Vega 56 (25 vs 21 TFLOPS dense).
AMD Radeon RX Vega 56 8GB
Full specs →AMD Radeon RX Vega 64 8GB
Full specs →Specifications
Performance (TFLOPS)
FLOPS by Precision
What actually differs
Both GPUs launched in 2017: the Radeon RX Vega 56 on Vega and the Radeon RX Vega 64 on Vega.
Dense throughput for the Radeon RX Vega 56 against the Radeon RX Vega 64: FP32 11 vs 13 TFLOPS, FP16 21 vs 25 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 8 GB against 8 GB, fed at 410 GB/s versus 484 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 210 W for the Radeon RX Vega 56 and 295 W for the Radeon RX Vega 64. At FP32 that works out to 0.05 against 0.04 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 Vega 56 faster than the Radeon RX Vega 64?
At FP16 precision the Radeon RX Vega 64 reaches 25 TFLOPS dense against 21 TFLOPS for the Radeon RX Vega 56. The performance table on this page lists every published precision for both GPUs.
Which has more memory, the Radeon RX Vega 56 or the Radeon RX Vega 64?
Both GPUs carry 8 GB of VRAM. Memory bandwidth is 410 GB/s for the Radeon RX Vega 56 and 484 GB/s for the Radeon RX Vega 64.
How much power do the Radeon RX Vega 56 and the Radeon RX Vega 64 draw?
The Radeon RX Vega 56 is rated at 210 W TDP and the Radeon RX Vega 64 at 295 W. On FP32 throughput per watt, the Radeon RX Vega 56 is the more efficient part.
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