Why does PCMark04s “Grammar Test” fail on some new CPUs when running at high frequencies?
The “Grammar Test” in PCMark04 is not a suitable test for the latest high-end CPU’s. The test fails on some processors that began shipping after PCMark04 was released. Futuremark strongly suggests using PCMark05 instead when evaluating and benchmarking the PC system performance. PCMark04 is no longer technically supported by Futuremark.