A Spymac thread posted this weekend reveals some screenshots and information about a feature of the new PowerMac G5's called "Slewing".
The feature is located in the Energy Saver Control Panel and allows the user to make some modifications to the Processor and Bus performance settings. A concept that is familiar to laptop owners... the G5 can be run in Reduced, Highest and Automatic performance settings.
To lower power consumption, heat generation, and fan noise, the Power Mac G5 computer incorporates an automatic power management technique called bus slewing. Bus slewing is designed to run at high processor and bus speeds and high voltage when the demand on the processor is high, and to run at low processor and bus speeds and low voltage when the demand on the processor is low.
Speed ranges involved start from 1.3GHz up to the highest rated GHz of the chip (1.6, 1.8, or 2.0). The default slewing option for the PowerMac G5s is Automatic, and the processor and bus speeds are modulated seamlessly to the user.
According to our contacts, there should be no performance loss in Automatic mode.
That being said, at least one user (in the previously mentioned thread) claims an 11 point increase in their Xbench score after changing their Slewing mode from Automatic to Highest. However, readers are reminded that XBench has been inconsistent in producing reproducible benchmark numbers -- even on the same machine. MacRumors' reader 1stunna managed to get a 11 point increase in Xbench scores by simply rerunning the test three times, with no other changes to the system. Whether this represents test-to-test variability or a side-effect of the processor automatically ramping up is still up for debate.
The ramp time up or down is ~1ms, but the CPU is running normally during this time, so there is no performance "hiccup". This results in about 60% power/heat savings, which jumps up to about 85% savings if the machine is idle and they "turn on other power saving features". When idle, the CPU fans are barely turning.
Sunday December 22, 2024 8:09 am PST by Joe Rossignol
iOS 19 will not drop support for any iPhone models, according to French website iPhoneSoft.fr. The report cites a source within Apple.
The report said that iOS 19 will be compatible with any iPhone that is capable of running iOS 18, which would mean the following models:
iPhone 16
iPhone 16 Plus
iPhone 16 Pro
iPhone 16 Pro Max
iPhone 15
iPhone 15 Plus
iPhone 15 Pro
...
Friday December 20, 2024 2:22 pm PST by Juli Clover
It's looking like 2025 is going to be an important year for Apple, with the company planning to revamp the iPhone, push further into smart home products, and improve Apple Intelligence. There are tons of new products rumored for 2025, including new iPhones, M4 Macs, a smart home command center, and much more.
We've highlighted the top five Apple products that will have the biggest impact in...
Sunday December 22, 2024 8:33 am PST by Joe Rossignol
Apple earlier this month released macOS 15.2, and in doing so it accidentally confirmed new MacBook Air models coming next year.
Apple accidentally released macOS 15.2 restore files for unreleased "MacBook Air (13-inch, M4, 2025)" and "MacBook Air (15-inch, M4, 2025)" models. While it no surprise that the 13-inch and 15-inch MacBook Air models were going to be updated with the M4 ...
Saturday December 21, 2024 4:45 pm PST by Joe Rossignol
Apple appears to be internally testing iOS 18.2.1 for the iPhone, based on evidence of the software update in our website's analytic logs this week. The logs have accurately revealed many iOS versions before they were released.
iOS 18.2.1 should be a minor update that fixes bugs and/or addresses security vulnerabilities, but it is unclear which specific issues might be resolved. The update...
Saturday December 21, 2024 2:03 pm PST by Joe Rossignol
Apple plans to release a new "HomePod" with a 7-inch LCD display, an A18 chip, and Apple Intelligence support in 2025, according to DigiTimes.
Google's Nest Hub
It is unclear how much the screen-equipped HomePod would cost, but Apple is seemingly aiming for a reasonable price. In a paywalled report this week, the supply chain publication said Apple has selected China-based manufacturer Tianma ...
Apple launched the controversial "trashcan" Mac Pro eleven years ago today, introducing one of its most criticized designs that persisted through a period of widespread discontentment with the Mac lineup.
The redesign took the Mac Pro in an entirely new direction, spearheaded by a polished aluminum cylindrical design that became unofficially dubbed the "trashcan" in the Mac community. All of ...
Tuesday December 17, 2024 9:02 am PST by Joe Rossignol
The current Apple TV 4K was released more than two years ago, so the streaming device is becoming due for a hardware upgrade soon. Fortunately, it was recently rumored that a new Apple TV will launch at some point next year.
Below, we recap rumors about the next-generation Apple TV.
Bloomberg's Mark Gurman last week reported that Apple has been working on its own combined Wi-Fi and...
On this week's episode of The MacRumors Show, we take a look ahead to all of Apple's expected hardware announcements for 2025.
Subscribe to The MacRumors Show YouTube channel for more videos
Rumors and reports from a range of reliable sources suggest that Apple will release at least 22 new products in 2025, with a series of minor to major updates and refreshes planned for the iPhone, iPads,...