I am working on building a new server in my apartment that will have a reasonably beefy GPU and CPU so I can get PCIE pass-through working and get a gaming VM set up.

Trouble is, my apartment is in the attic in the south. With the AC on I had one or two really bad days last year that it got up to 90 degrees Fahrenheit inside with high humidity.

Any cooling suggestions for something like that? Is 90 degrees Fahrenheit still cool enough to reduce the temperature of my components? I would really like to avoid buying a phase change cooler, but that is the only thing I can think of if the ambient is too high.