Annex C in ECMA 74 outlines the operating conditions for personal computers and workstations during acoustic testing. In practice, the way systems are used and designed changes over time. After InterNoise 2018 in Chicago, a special IT industry workgroup was formed with the goal to update this section in Annex C to better reflect current workloads during use. This paper outlines the new operating conditions that were developed by this workgroup. It describes the different operating modes to be measured, and how to set and document power and performance parameters during the acoustic measurements. In addition to the standard idle condition, it includes operating conditions selected from the following usage scenarios: 1) web browsing, 2) office productivity, 3) media content creation, and 4) power user/gaming.