Taken at face value, the specifications tied to Apple’s most recent MacBook Air updates imply the latest pair of ultra-slim notebooks should handily outperform their predecessors, but a new report claims this notion only holds true for the slower of the two models.
According to Macworld’s review, the most recent MacBook Air notebooks, an entry-level US$1,499 model with a 1.86GHz processor and 120GB hard drive, and a high-end version for US$1,799 that sports a 2.13GHz Core 2 Duo processor and 128GB solid-state flash drive, have been tested against their predecessors introduced last October: a 1.6GHz model with a 120GB (then priced at US$1799) and a 1.86GHz version with 128GB solid-state flash drive (then priced at US$2499).
While the new low-end 1.86GHz model bested its 1.6GHz predecessor, outperforming it in most tests and recording a Speedmark score of 11 points higher at 156, the same couldn’t be said for the new high-end 2.13GHz MacBook Air, which achieve a score of 175 — a full 4 points lower than the previous-gen 1.86GHz model.
“What’s weird about the new high-end MacBook Air model is that although it cost dramatically less than its immediate predecessor, it was also slower than that model,” wrote Macworld’s editor, Jason Snell. “The late-2008 1.86GHz MacBook Air was faster than the new top-of-the-line model in 11 of our 18 tests, and as a result, the old system’s final Speedmark score was slightly higher.”
Snell also reported that he saw several cases in which the new, low-end MacBook Air, with its slower Core 2 Duo chip and hard disk drive, outperform the high-end model and its sold-state flash drive. He notes that this may be the result of hard drives being known to outperform their solid state drives in certain operations, but added that the slower system also beat the faster model in some video compression and 3D rendering tests.
“We’re not quite sure why this is happening, though it’s possible that the Air’s thermal-protection systems are aggressively ratcheting down the speed of the faster, hotter processors when they’re asked to perform those tasks, slowing their performance,” he wrote.
In light of these results, it’s worth noting that several Apple authorized resellers maintain inventory of the previous-generation 1.86GHz MacBook Air, which they’re discounting to a price of US$1,649 (roughly US$150 cheaper than than the new 2.13GHz model they appear to be outperforming).