Xbox 2 & PS5 SDK Specs

X2-SDK (final)
Ram: 64GB DDR4
GPU: 1550 MHz
CPU: 3.3 GHz
Strg: 2TB SSD
Disc: UHD

P5-SDK (v3)
Ram: 64GB DDR4
GPU: 1730 MHz
CPU: 3.2 GHz
Strg: 2TB SSD
Disc: UHD (spec 2)

FWIW: One of these kits actually had public game footage shown without knowing the hardware behind it. I'll give you a clue, one of the most respected developers in simulation. That's all folks!