According to SN the sticks are actually Samsung-based. Given OC numbers I'd say that sticks are 2Gbit D-rev. You can try setting tRFC to 128, tRRD / tRTP / tWTR to 4 or 5 and tWCL to 6. If it works out then there's not much more that you can do.
11/20/14 at 6:24pm