ya many people asks this question .but let me tell you one thing that the ddr3 motherboard means that it only supports ddr3 ram and doesn't specifies anything about (graphics dynamic data rate ) graphics ddr memory .so there is no link between motherboard ddr version compatiblity and the graphics card ddr version .so don't take any kind of tension about graphics card ddr version .your mobo specifies ddr3 only for ram not for graphics card .so no problem if you even plug a gddr6 graphic card in your mobo ....ha ha LOL ^_^ .be assured it will have no problems at all