Cryptocurrency mines have been doing outside-air cooling in desert climates, at ungodly scales, for a long time now.
At least a decade of that "long time" involved ordinary servers stuffed with GPUs (not ASICs) -- first for Bitcoin, then for Ethereum (until ~3 years ago).
Yes I've run many here in Canada - but you still need to keep intake air very clean and they will absolutely rust out or short from dirt ingestion if filters and humidity are out of check. They're also designed with higher tolerance to temperature than servers.
The amount of dead antminers I've seen from snow ingestion is honestly concerning.
Yeah sure, you need good air filters. But bag filters are cheap. Even at the small scale of a $5m datacenter the cost of good air filters is a rounding error.
At least a decade of that "long time" involved ordinary servers stuffed with GPUs (not ASICs) -- first for Bitcoin, then for Ethereum (until ~3 years ago).