ASRock FM2A55M-VG3 Quick Installation Guide - Page 7

CAUTION! 1. Whether 1866/1600MHz memory speed is supported depends on the CPU you adopt. If you want to adopt DDR3 1866/1600 memory module on this motherboard, please refer to the memory support list on our website for the compatible memory modules. ASRock website http://www.asrock.com 2. Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows® 8 / 7 / VistaTM. For Windows® 64-bit OS with 64bit CPU, there is no such limitation. You can use ASRock XFast RAM to utilize the memory that Windows® cannot use. 3. For the discrete GPUs which support Dual Graphics technology, please refer to http://www.amd.com/us/products/technologies/ dual-graphics/Pages/dual-graphics.aspx#3 for details. 7 ASRock FM2A55M-VG3 Motherboard English