A4000 - 50GB , BUT ONLY GETTING 16 GB BASED ON nvidia-smi

Hello, not sure if I am doing something wrong, but I purchased a pod using A4000 50GB, but when I run nvidia-smi I only see 16GB. I am not sure why ? I see after purchase that this is 9cpu, so not sure what is going on , since even 9x16 = 144, so why is this advertised as 50GB ? Any clarifications or settings please do advise, it is not obvious.