As much as these two fans may look like a standard PC fan, they are industrial fans, so it is a bit hard to compare them to a typical PC fan. Will they work in your home PC? Sure - they will work just fine, but you will never get them to run at their maximum rated speeds on the 12V from the PSU in your home system. You need 24V to get the maximum speeds and that of course requires a dedicated external 24V power source. Who would go to that much trouble and expense when Noctua has a full line of case and cooler fans that are just perfect for your PC?
These industrialPPC fans are intended for use in an industrial environment where 24V is typically available. Moisture and dirt are often encountered in an industrial environment and that is exactly where these fans are best used. The IP67 rating ensures that the internal components are protected and these fans are up to the task of reliably moving air in an industrial application. The AEC-Q100 qualification ensures that these fans meet the failure-mechanism-based stress tests for integrated circuits.http://www.overclockersclub.com/reviews/noctua_ppc_fans/ Attached thumbnail(s)