The MSI MS-C903 is a new and compact PC that is passively cooled and can be used in an extended temperature range. A large amount of RAM can be installed.https://www.notebookcheck.net/MSI-MS-C903-Passively-cooled-mini-PC-with-many-ports-and-Core-i7-processor.836098.0.html
i think theres some irony in this in that you choose an intel platform notorious for thermal inefficiency and throttling to do passive cooling on