AMD Radeon RX 7800 XT 16GB vs AMD Radeon PRO W7900 Dual Slot 48GB

The Radeon PRO W7900 Dual Slot is the newer part: RDNA 3, launched in 2024, against the Radeon RX 7800 XT'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 RX 7800 XT against the Radeon PRO W7900 Dual Slot: FP32 37 vs 61 TFLOPS, FP16 75 vs 123 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.

Memory is 16 GB against 48 GB, fed at 624 GB/s versus 864 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 263 W for the Radeon RX 7800 XT and 295 W for the Radeon PRO W7900 Dual Slot. At FP32 that works out to 0.14 against 0.21 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.