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That depends on the workload and the amount of users, VPX10 limitation is 10Mbps bandwidth. A ballpark HDX 3D calc is 1.5 Mbps per user - this is an older article but still relevant and a good place to start. https://www.citrix.com/blogs/2014/04/16/from-the-field-xendesktopxenapp-bandwidth-update/