ASUS want you to know about a little thing called Core Unlocker, which can enable disabled cores on certain models of AMD dual and triple-core processors.
ASUS' Core Unlocker feature - found on the newly released M4A89GTD PRO motherboard - checks disabled CPU cores to see if they're indeed functional and potentially allows you to very easily turn them back on. If all is well your dual/triple-core AMD processor may become a quad-core... for free! Keep in mind that the usual overclocking caveats apply here in full force - meaning there is NO guarantee and that support varies from processor to processor. Read about it in this PCSTATS review or the PR blurb below.
ASUS M4A89GTD PRO Series Motherboards transform various AMD dual and tri-core processors into performance shredding Quad Cores!
"ASUS continues its innovation leadership with the first AMD 890GX based motherboards featuring SATA 6Gb/s, USB 3.0**, and exclusive core unlocking technology. Additionally, as part of the Xtreme Design line-up, the M4A89GTD PRO Series delivers exceptional reliability and performance.
A Simple Way to Boost Performance: Core Unlocker
Previous generation solutions relied on AMD’s Advanced
Clock Calibration (ACC) technology for core unlocking and did not always unlock
the core and cache intelligently. With the removal of ACC from the newly
introduced 890GX chipset, ASUS’ new Core Unlocker Technology
intelligently scans the installed processor to properly determine which cores and cache can be unlocked*. In seconds you can maximize your system performance and tackle those intensive processing applications with ease.
Users can determine how to implement this innovative technology by sliding a switch on the motherboard, changing a BIOS setting, or simply pressing the "4" key when the machine first starts. Core Unlocker makes it simple thanks to ASUS’ award winning Turbo V EVO hardware and software. The M4A89GTD PRO Series also features enhanced overlocking performance, auto-tuning technology, improved power savings, and class-leading cpu/chassis fan controls with our exclusive Fan Expert software.
“ASUS is proud to continuously provide unique performance options such as TurboKey II for easy overclocking, GPU Boost, and Core Unlocker via our award-winning Turbo V EVO solution.” said Timothy Lin, Motherboard Product Manager. With the M4A89GTDPRO /USB3 ASUS has engineered the best experience possible for AMD platform users.”
*Not all processors are supported. Core Unlocker results
may vary. ** USB 3.0 is available on the M4A89GTD PRO/USB3 model"