If you are using and AMD FW13, updating to the latest AMD driver will let you create a custom resolution (such as 1128x752) so you can game at lower resolutions than native
Custom Resolution Utility - Download
Custom Resolution Utility (CRU) - Download - CHIP
Custom Resolution Utility - Download
Custom Resolution Utility - Download
Custom Display Resolution Utility for Windows - gHacks Tech News
Nvidia Surround and Custom Resolution Utility(CRU) : r/pcmasterrace