You might be looking at it a bit differently than me, here. What I was looking at is the central components for CPU &amp; storage are on the card. Power, memory, and peripherals are in the chassis. The card&#x27;s connectors plug directly into that. So, if anything, I&#x27;m re-creating the old situation in towers of pluggable CPU&#x27;s except it&#x27;s externally pluggable and the tower is now a laptop with integrated electronics.<p>Regardless, it was very important to move the CPU out given it&#x27;s a high chance of targeting or subversion. It is literally the root of trust for computation. I protect it because I assume attackers will be smarter than me and use it against me somehow. Far as cooling, I admit I didn&#x27;t think much of it for the high-end: just decided on efficient CPU&#x27;s where that wasn&#x27;t so much a problem. Think along the lines of the card computers that need no cooling but have good performance.<p>&quot;Joanna&#x27;s approach is much more attractive in terms of being something that involves very little modification of existing platforms.&quot;<p>Convenience vs security. Always a tradeoff. I promise you that in physical you&#x27;ll find the more convenient versions will usually get you screwed. Especially if EMSEC or subversion matters to you. I&#x27;m holding off reviewing specifics of her work until she finishes it. No promises that I will but I&#x27;d rather wait for finished thing given nature of this topic. I&#x27;m writing on the general concept which predates it on paper and partly in real products.