1. the NZXT AB-RH175-B1 is primarily designed for NZXT cases such as the H5, H6, H7 and H9 series. It requires 7 free PCIe slots and supports graphics cards with up to 3 slots width.
The be quiet! Light Base 600 LX also has 7 expansion slots and offers sufficient space for large GPUs. However, the NZXT kit is not officially certified for this case, so there may be fitting problems. Some users report that they have successfully installed vertical GPU mounts in this case, but this is not guaranteed.
2. NZXT AB-RH175-B1 supports graphics cards up to 3 slots wide, which applies to the RX 7900 XT AORUS Elite. The PCIe 4.0 riser cables ensure optimum data transfer.