Abstract: Multimedia So C equips with more powerful devices, which delivers a plenty of requests and incurs inter device memory interference. We proposed a bank partition method to alleviate the inter device memory interference for the multimedia So C. The memory bandwidth and latency are taken as heuristic information to identify the device that incurs massive interference. By mapping unfriendly devices to separate banks, it breaks the sharing relationship and mitigates the inter device interference, requiring no modification of hardware and applications. By running HDTV applications, this method is evaluated on a real So C platform. Experimental results show that, the proposed method can provide a performance improvement by 8.4%~12.3%. While guaranteeing the quality of service, the frequency of memory can be reduced further for saving power consumption.