1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

AMD Cool 'n' Quiet, Turbo Core Impact On Linux

Michael Larabel

Published on 16 November 2011
Written by Michael Larabel
Page 1 of 7 - 8 Comments

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.

Cool 'n' Quiet is AMD's CPU throttling technology to reduce the clock speed and voltage when the processor is idling or with minimal load, to ideally go through less power, reduce the heat output, and lower the fan speeds. This technology is not new at all and has been around since the original Athlon 64 series. It's been supported under Linux going back to the Linux 2.6.18 kernel and was benchmarked more than five years ago at Phoronix, but this is a modern look at the advantages (or disadvantages) of this technology when using an eight-core FX-8150 Bulldozer. Intel's equivalent to AMD CnQ is Enhanced Intel SpeedStep Technology (EIST).

Cool 'n' Quiet is about saving power and being more efficient while Turbo Core is about the opposite: maximizing performance. The Bulldozer CPUs feature Turbo Core 2.0 (Turbo Core was originally introduced with the Phenom II family). Turbo Core 2.0 allows boosting active cores on the Bulldozer processor. If less than half the cores are being utilized, a "max turbo mode" is used on all stressed cores. However, if all cores are being pushed to their limits, Turbo Core is activated but at a lower frequency than the maximum. This auto-overclocking is done automatically when needed. The AMD FX-8150 has a base frequency of 3.6GHz and can be turbo boosted up to 3.9GHz.

The AMD FX-8150 Bulldozer on the ASUS Crosshair V Formula motherboard was used for testing. Ubuntu 11.10 was employed with the Linux 3.1 kernel. The Cool 'n' Quiet and Turbo Core features were toggled from the ASUS UEFI BIOS. There are tests of No Cool 'n' Quiet, with Cool 'n' Quiet enabled, and then when Turbo Core was enabled. Besides looking at the benchmark results themselves, the CPU frequency, temperature, and power consumption were also logged by the Phoronix Test Suite in this brief demonstration.

<< Previous Page
1
Latest Linux Hardware Reviews
  1. Scythe Mugen MAX
  2. Intel Core i7 5960X Haswell-E On Linux
  3. Intel 80GB 530 Series M.2 SSD On Linux
  4. With A New Motherboard, The Core i7 5960X Haswell-E Lights Up
Latest Linux Articles
  1. A Tour Of The New Phoronix Office
  2. 7-Way Linux Desktop Gaming Comparison On Ubuntu 14.10
  3. Intel P-State vs. CPUFreq Benchmarks On The i7-5960X
  4. RadeonSI GLAMOR Benchmarks With X.Org Server 1.16
Latest Linux News
  1. Linux 3.17-rc6 Released; Linux 3.17 Final Might Come In One Week
  2. X.Org Server 1.16.1 Released
  3. Mesa Gets Closer To Having OpenGL 4.0 Tessellation Support
  4. Uselessd: A Stripped Down Version Of Systemd
  5. F2FS Tools Gain FSCK Support
  6. FreeBSD 10.1 Has The New VT Driver, Hardware Improvements
  7. AntiMicro 2.6 Yields Greater Compatibility For Gamepads On Linux
  8. OpenGL 3.3 / GLSL 3.30 Lands For Intel Sandy Bridge On Mesa
  9. AMD's RadeonSI Gallium3D Driver Sees Some Improvements
  10. Mesa 10.3 Released With The Latest Open-Source GPU Driver Improvements
Latest Forum Discussions
  1. Wasteland 2 Officially Launched Today, Including For Linux Gamers
  2. NVIDIA GTX 770/780 -works ?
  3. Trolling on the Phoronix forums
  4. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  5. New stress testing utility for GPU's
  6. ASRock AM1H-ITX: One Of The Best AM1 Mini-ITX Motherboards
  7. Can Linux kill a motherboard?
  8. Stop grabbing my keyboard :(