I currently have the OCZ gold OCZ3G1600LV6GK 6gb with 8-8-8-24 timings on my mobo. I want to add another 6gb for total of 12gb and was wondering if using the OCZ3X1600LV6GK (6gb xmp version kit with 8-8-8-24 timings) or the OCZ platinum OCZ3P1600LV6GK 6gb with 7-7-7-24 timings would be possible with my exisiting 6gb kit. Or does it have to be the same kit from the manufacturer. Thanks.