The RX 9070 XT and RX 7900 XT graphics cards both utilize dual-ball fan bearings, which are known for their enhanced durability compared to sleeve bearing designs[2][3][7][8][9]. Dual-ball fan bearings can last up to twice as long as sleeve bearings[2][3][7][8][9].
RX 9070 XT:
* ASUS Prime Radeon RX 9070 XT: Employs dual-ball fan bearings to improve fan longevity[5]. Also features 0dB technology that deactivates the fans below 50°C and reactivates them at 55°C[9].
* SAPPHIRE NITRO+ AMD Radeon RX 9070 XT: Equipped with AeroCurve Fan Blade Design and dual-ball bearings to increase longevity while maintaining low noise levels[1][6]. The fans are designed for easy removal, cleaning, and replacement[1][6].
RX 7900 XT:
* ASUS TUF Gaming Radeon RX 7900 XT: Features axial-tech fans and dual-ball fan bearings that last up to twice as long as conventional designs[3].
* ASUS Dual Radeon RX 7900 XT: Contains axial-tech fans and dual-ball fan bearings that can last up to twice as long as sleeve bearing designs[7]. The fans come to a standstill when the GPU core temperature is below 55 degrees Celsius[7].
While both cards utilize dual-ball fan bearings known for their durability, no information within the search results suggests that one card's bearings are more durable than the other.
Citations:[1] https://www.sapphiretech.com/en/news/sapphie_rx9070-series
[2] https://www.asus.com/motherboards-components/graphics-cards/prime/prime-rx9070xt-o16g/
[3] https://www.asus.com/us/motherboards-components/graphics-cards/tuf-gaming/tuf-rx7900xt-o20g-gaming/
[4] https://www.asus.com/motherboards-components/graphics-cards/tuf-gaming/tuf-rx7900xtx-o24g-gaming/
[5] https://www.guru3d.com/story/asus-announces-amd-radeon-rx-9070-and-9070-xt-graphics-cards/
[6] https://www.sapphirenation.net/sapphire-rx-9070-series
[7] https://www.asus.com/motherboards-components/graphics-cards/dual/dual-rx7900xt-o20g/
[8] https://www.asus.com/motherboards-components/graphics-cards/dual/dual-rx7800xt-o16g/
[9] https://www.reddit.com/r/Amd/comments/1j07oib/introducing_the_asus_radeon_rx_9070_xt_and_rx/
[10] https://forums.tomshardware.com/threads/about-gpu-fans.3762282/
[11] https://www.overclockers.com/xfx-merc-310-rx-7900-xt-review/