**Surprisingly, the (W)7800(XT) and the 6800XT are essentially the same*. However, the RDNA3 device requires less power to operate.

After undergoing testing by IgorsLAB, the artificially ‘modified’ 16GB Radeon PRO w7800 demonstrated a performance improvement of approximately 3% when operating at 4k resolution, when compared with its predecessor, the well-known RX 6800 XT. Yikes.

On the power consumption side the W7800 required only 239W to operate compared to 299W for the RX 6800XT.

Links
https://www.igorslab.de/en/amd-radeon-rx-7800xt-review-as-radeon-pro-w7800/5/