This little mini-tower PC is plenty fast.  It starts and shuts down quickly, too.  And it is quiet enough to be a home theater PC -- unless you're an audiophile, in which case a totally fanless system might be best.There is no case fan; the power supply's cooling fan is probably all the Acer needs to stay cool.  But there is a place on the rear chassis to mount a fan, and an available 4-pin fan connector on the motherboard.  So I ordered and installed a Noctua NF-A8 PWM, Premium Quiet Fan, 4-Pin (80mm, Brown).  This fan installed easily and the Acer runs very quiet even with the added fan.