Hmm, technically no, an R7 5700G system and 2x 32GB sticks would be around a fifth of the price. That's if you don't need a lot of compute. It's also right around 1/8th the performance of a 3080 but it doesn't have Tensor cores which is big downside in ML.
In theory you could even push the 5700G to 128GB if you figured out a way to get ECC to work on it.
In theory you could even push the 5700G to 128GB if you figured out a way to get ECC to work on it.