Not anymore. Bitcoin now requires dedicated hardware (ASICs). Other coins were designed to make use of ASICs impossible or impractical, requiring GPUs, but those still require a CPU to drive them.
New developments, such as Ethereum moving away from proof of work to proof of stake made GPUs unnecessary, but you still need a computer with a CPU to validate the blocks on the block-chain.
Edit: Even with ASICs mining bitcoin, you still need servers to distribute the work to them.
Not anymore. Bitcoin now requires dedicated hardware (ASICs). Other coins were designed to make use of ASICs impossible or impractical, requiring GPUs, but those still require a CPU to drive them.
New developments, such as Ethereum moving away from proof of work to proof of stake made GPUs unnecessary, but you still need a computer with a CPU to validate the blocks on the block-chain.
Edit: Even with ASICs mining bitcoin, you still need servers to distribute the work to them.
So, like… a computer.
Analog computers don’t have CPUs as we understand them…
so the calculations are done on the cpu now?
is that why the powerful chips are being bought?
It depends on the coin, but basically, yes.