R7725 caps RTX Pro 6000 Blackwell at 450W

The NVIDIA RTX Pro 6000 Blackwell card supports running at 600W, sustaining higher performance.

The Dell R7725 rack server has been advertised by Dell as being capable of hosting this GPU (see https://www.youtube.com/watch?v=bye7OQLpkSg). 

However, according to the R7725 manual (https://www.delltechnologies.com/asset/en-in/products/servers/technical-support/poweredge-r7725-technical-guide.pdf), it seems that the R7725 will cap the GPU at 450W, not allowing it to reach its 600W capacity.

Two questions:

1. Can confirm whether or not the RTX Pro 6000 Blackwell will be capped at 450W in the R7725?

2. If it is indeed capped at 450W, can you explain what is the expected impact on performance?

I am a user trying to decide what server to buy to host this GPU, and it is important for me to understand this before making a decision.

This question is a spin off from https://www.dell.com/community/en/conversations/rack-servers/dell-server-r770-and-the-new-rtx-pro-6000-blackwell-server-edition/689c6fbfafa0146bd1eb444b?commentId=689cde69c3c7331395906f35. Since that question is marked as "solved", I decided to open a new question.