title: Peer-to-Peer CUDA transfers
body: <p>I heard about peer-to-peer memory transfers and read something about it but could not really understand how much fast this is compared to standard PCI-E bus transfers.</p>
  
  <p>I have a CUDA application which uses more than one gpu and I might be interested in P2P transfers. My question is: how fast is it compared to PCI-E? Can I use it often to have two devices communicate with each other?</p>