Wednesday, February 03, 2010, 01:15 pm PT (04:15 pm ET)
Nehalem Mac Pro systems suffer audio-based performance issuesThe latest Mac Pro models with Nehalem-based Intel Xeon processors reportedly suffer a 20 percent performance hit when playing audio in Mac OS X, users have reported.
Highlighted by Ars Technica, the issue applies to both early 2009 and late 2009 Mac Pro models. When playing audio through iTunes or a number of other applications, users have seen CPU temperatures double, while performance can take a serious hit.
Various user test have found that running Windows 7 via Boot Camp eliminates the issue, leading some to believe the issue is related to power management kernel extensions in Mac OS X.
"Further tests using benchmarks that run the CPU to full utilization show less dramatic temperature increases and, despite the high heat during audio playback, the Mac Pro's fans do not come on," the report said. "Confounding the issue even more is the fact that using audio doesn't seem to show any corresponding increase in processor load, just increases in power draw and heat."
Users have reported attempts to discuss the issue with AppleCare representatives, but have allegedly been told that the temperature range for the processor is considered "normal." Speculation on what could cause the issue from a variety of sources is available in the full article at Ars Technica.
Apple's Mac Pros with Intel Xeon processors based on the Nehalem architecture were introduced in March 2009. in December, Apple added a 3.33GHz quad-core option
Recent reports have suggested Intel's new six-core "Gulftown" processor could be headed to the Mac Pro in a future upgrade. Apple could stick with the workstation-focused Xeon line of chips, though some rumors have suggested Apple could switch to the new Core i7-980X processor, based on the same architecture.
On Topic: Mac Pro
- Apple debuts $50 security lock adapter for redesigned late-2013 Mac Pro
- Apple catches up with Mac Pro demand, shipping times fall to 24 hours
- Tim Cook lauds 'American manufacturing expertise' during visit to Texas Mac Pro factory
- Apple's Mac Pro ship times fall below one week for first time since launch
- WaterField Designs' Mac Pro Go Case keeps Apple's desktop safe during transport