XSG can stress up to 8 cores simultaneously in automatic,XSG uses a special algorithm automatic lucas-lehmer.XSG running an endless cycle of interactions,XSG has two timer to see the total time of the test,XSG V1.0 application freeware
With Speed Test you can monitor CPU (over 8 cores) and RAM usage by itself and it has the ability to test so much more.
A graph interface, allowing you to see results over time.
Speed Test also has cross-hairs that allow you to put your cursor over the line you are inquiring about and detailed information is shown with the time and value of that point on the graph.