6.1 was running on an even more ancient PC from 2001. This was at a former employer so I have no influence over this system any more. The funny thing was that we had ample budget for this project, I think we spent about $10k on a very nice rack-mount SCXI DAQ and about $60k on other equipment but upgrading the computer system driving the whole thing was out of the question due to color-of-money issues and dysfunctional inter-departmental politics.