Running Cool 'n' Quiet under Linux with AMD
Subject: Processors | November 23, 2011 - 01:47 PM | Jeremy Hellstrom
Tagged: amd, bulldozer, cool 'n' quiet, Turbo Core, linux, fx-8150
AMD's Cool'n'Quiet feature, which lowers your CPU core frequencies when they are not under heavy usage has been around for a while, but Phoronix though it was time to revisit the Linux support for this feature and Turbo Core as we have a brand new architecture to test. They fired up the FX-8150 again, running under Ubuntu 11.10 with the Linux 3.1 kernel and started benchmarking. Their results show that AMD's power saving features are still working well under Linux, better when using single threaded applications than with multi-threaded but still worth enabling for those who want lower heat production and energy consumption. It is hard to say how much you will save on power though, as the software Phoronix used to measure, fam15h_power, never budged from the 125W mark even when the system was pulling less power from the wall.
"For those wondering about the impact that AMD's Cool 'n' Quiet and Turbo Core technologies have under Linux for the latest-generation Bulldozer processors, here are some tests illustrating the changes in performance, power consumption, and operating temperature."
Here are some more Processor articles from around the web:
- Bulldozer for Servers: Testing AMD's "Interlagos" Opteron 6200 Series @ AnandTech
- AMD's Bulldozer server benchmarks are here, and they're a catastrophe @ Ars Technica
- How-To: 8 GHz on Bulldozer @ Overclockers.com
- AMD FX-8150 Bulldozer Overclocking On Ubuntu Linux @ Phoronix
- Desktop CPU Comparison Guide @ TechARP
- Intel HiZ Is Finally Ready For Sandy Bridge @ Phoronix
- Intel Core i7 3930K @ Tweaktown
- Intel Core i7-3930K, Core i7-3960X Extreme Edition Processors for LGA 2011 @ X-bit Labs
- Intel Core i7-3960X Extreme Edition CPU @ Benchmark Reviews