I'd use whatever I had. My towers are nowhere near as powerful as modern laptops, anyhow. The advice on keeping the vents clear is spot on; I've managed to fry a couple of boards in my towers, due to them getting clogged with dust and cat hair. Not smoking around your computers helps, too. The sticky tar residue gets into the box and gives dust an extra something to cling to. Does the computer a world of good, that does. You could also train a desk fan onto the laptop. It certainly won't hurt and it's a very simple solution.

Coppula eam se non posit acceptera jocularum.

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