Question about Lenovo ThinkCentre neo Ultra

We only have the i9 version with 64 GB
Lenovo ThinkCentre neo Ultra (Intel Core i9-14900, 64 GB, 2000 GB, GeForce RTX 4060)

Hi thanks. This is understood. However if I buy the i7 model and buy additional RAM, how can I install it without cancelling the warranty?
Maybe you can send me the supplier contact and I may ask them directly.