8GB Corsair VENGEANCE DDR4 2400MHz (1 x 8GB)
12GB NVIDIA GEFORCE RTX 3060 - HDMI, DP
Wait, did you just get a system with more video memory than main memory?
Edit: Also, I noticed that you got a UK power cord, but you are from the US, and I'm pretty sure that's not going to work. So, maybe you need to double check that?