Improving performance is one of Microsoft’s design goals with Windows 7, and many early reviewers have said that the new OS seems peppier than Vista. But tests of the Windows 7 Release Candidate in our PC World Test Center found that while Windows 7 was slightly faster on our WorldBench 6 suite, the differences may be barely noticeable to users.

We loaded the Windows 7 Release Candidate on three systems (two desktops and a laptop) and then ran our WorldBench 6 suite. Afterward we compared the results with the WorldBench 6 numbers from the same three systems running Windows Vista. Each PC was slightly faster when running Windows 7, but in no case was the overall improvement greater than 5 percent, our threshold for when a performance change is noticeable to the average user.

The largest difference was 4 points–102 for Vista versus 106 for Windows 7 on an HP Pavillion a6710t desktop. Our other two test machines showed similarly minor performance improvements: A Maingear M4A79T Deluxe desktop improved by 1 point (from 138 on Vista to 139 on Windows 7), and a Dell Studio XPS 16 laptop improved by 2 points, from 97 on Vista to 99 on Windows 7.