What brand, model and CL rating is the 64GB RAM in the Blade 18?

I just bought a Blade 18 with the 13980 processor, 64GB DDR5 RAM @5200MTs, RTX 4090 and 2 TB SSD. I want the fastest RAM possible in it with the lowest CL rating. While the factory says it is 64GB @5200MTs, it does not give the CL (latency spec) or brand/model of their factory installed RAM. Does anyone know the answer to this?
And, while I’m at it, what brand and model is the 2TB SSD drive in this laptop from the factory, and what are it’s read/write speeds?
I am considering Kingston Fury RAM @5600MTs and WD Black SN850X 4TB drives. Does this sound about right? Has anyone tried this combo or can anyone advise me on the upside/downside of this mod?
Thanks, and I look forward to joining the community. (I defected from the AWM18 camp!)