TechARP has once again obtained some inside documents on Windows 7. This time, they were able to obtain information outlining the new Windows Experience Index (WEI) scoring model. The documents contain interesting info that answers many popular questions about WEI, such as why users are receiving lower than usual disk scores.

a) The top-end of the scale is higher The maximum value is now 7.9 instead of 5.9. Components, especially CPU, that were max-ed out on the Windows Vista scale can get higher scores on the Windows 7 scale.s

b) There are more extensive disk tests which can detect a wider range of issues, leading to lower disk scores. In particular, the new write flush policy tests focus on latency issues, which can cause UI hesitation and hangs. Disks showing latency issues are capped at 1.9 and 2.9, based on test results.

c) CPU tests are run for both single and multi-threaded scenarios. Scoring for systems with lower results on the single-threaded runs will be limited by a scoring factor.

The documents also outline what has changed in Windows 7 and offers an in-depth analysis on how the CPU and RAM are rated by the WEI program. You can read all of TechARP’s documents here.

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