The change from DDR400 to DDR500 as the official memory standard for AMD would be quite a feat, being as no JEDEC standard exists for DDR500 at all.  But none the less, CoolTechZone thinks it might happen.

Before making the switch to other memory standards, the chipmaker has decided to extend support for DDR even further. The source said AMD would most likely support DDR500 with its Venice core microprocessors.

According to the information we received, AMD was in talks with memory makers to make this idea a reality since last year. In fact, the chipmaker was conversing about supporting low-latency DDR500 modules, as they tend to work best with AMD microprocessors and their onboard memory controller.