AMD Radeon PRO W7900 Dual Slot 48GB vs AMD Radeon PRO W7800 32GB

The Radeon PRO W7900 Dual Slot is the newer part: RDNA 3, launched in 2024, against the Radeon PRO W7800's RDNA 3 from 2023. 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 PRO W7900 Dual Slot against the Radeon PRO W7800: FP32 61 vs 45 TFLOPS, FP16 123 vs 90 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.

Memory is 48 GB against 32 GB, fed at 864 GB/s versus 576 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 295 W for the Radeon PRO W7900 Dual Slot and 260 W for the Radeon PRO W7800. At FP32 that works out to 0.21 against 0.17 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.