It's marginal though. Germany based Mindfactory store revealed the number of sales and RMA of each graphics card, and Nvidia came out on top in both sales quantity and a lower percentage of graphics for RMA. 3.3% of the AMD GPUs sold had to be replaced, while on the Nvidia side it was 2.1%.

Despite Nvidia having a lower overall RMA rate, it does have the GPU with the most requested replacements: The GeForce RTX 2080 Ti. 5% of the RTX 2080 Ti were replaced, outperforming 4% of the Radeon RX 5700 XT, Radeon RX 5700 and GeForce RTX 2080. It also has the GPU with the lowest failure rate, the GTX 1660 Ti, with just 0.01% of cards showing faults.

• The manufacturer with the highest failure rate on the AMD Radeon side was Powercolor, with 6% of GPUs replaced by failures. Those with the least amount were Asrock, MSI and Sapphire with 2%. Regarding sales, the one that sold the most was Sapphire, with 13,700 sales, far outperforming the rest of the brands.
• On the Nvidia GeForce side, the manufacturer with the highest RMA rate was Palit with 4%, followed by Gainward with 3%. The rest of the manufacturers had 2%, a pretty good value. MSI sold the most cards, with 28,680 GPUs sold, followed by KFA2 (Galax) with 20,040 sales and Gigabyte with 16870.

A total of 76,280 Nvidia GeForce GPUs and 44,100 AMD Radeon GPUs were sold, so 63.4% of the GPUs sold were GeForce and only 36.6% of the GPUs sold were Radeon.

AMD Radeon GPUs have a slightly higher RMA rate than Nvidia GeForce