PCI 3.3 vs 5 volt -Why no supplier info?

Hi

I have to get various fax/modem and multi-port PCI cards on a regular basis for a number of server makes/models.

The thing that drives me crazy is that about 80% of suppliers/manufacturers DO NOT PUBLISH PCI SLOT TYPE requirements (i.e. 3.3volt or 5 volt or Universal)…why not ?!

With many 3.3 volt only servers (maybe PCs also?) coming out people NEED this information.

Any others out there with similar issues ?

Cheers

T