(Probably not for this here though.)
- FPAGs like this one are generally COTS.
- All the experiments use GPUs which come straight from the vendors.
- Most of the computing isn't even on site, it's distributed around the world in various computing centers. Yes they also overflow into cloud computing but various publicly funded datacenters tend to be cheaper (or effectively "free" because they were allocated to CERN experiments).
Some very specific elements (those in the detector) need to be radiation hard and need O(microsecond) latency. These custom electronics are built all over the world by contributing national labs and universities.
CERN builds a bit.
It is a project bureau. Everything is essentially outsourced, leaving a management shell institute to parade for VIPs. Actually they are close to completely forgetting what they already knew in the hard sciences domain.
Who says CERN needs to be cost effective?