Reddit reviews High Performance Blow Gun with Ultimate Flow Tip

I just take my computers outside and hit 'em with the compressor at 100psi.

I do however, use one of these as my blow gun, which more-or-less halves your pressure and doubles your air flow (really pretty impressive how well it works, I bought it on a whim with an XMas gift card, mostly expecting it to be just a bunch of BS, but it really works). If you use a standard $1.99 blow gun, 100psi is probably too much and risking damage to your hardware.