Well the first thing that I noticed on checking your memory on the QVLs it doesn't appear on either one.The Gigabyte QVL lists this as the nearest:AET16C2 2GB A-DATA AX3U1600GB2G9-AG DS v 6PCSand the A-DATA QVL lists the GA-X58-UD3R but not your board. Similar but not the same.You would have had less trouble if you had made sure that the memory had been tested as compatible. That is not to say that it cannot be persuaded to work with your board but it is more trouble getting the settings right.
The spec sheets are ambiguous and misleading at best. I'm going to exchange the 1600 Corsair Ram I bought yesterday for 1066 ram.That's the only ram supported on official specs by BOTH the board and the CPU.....but the only 1066 ram on the compat sheet that is of any note (in terms of manufacturer) is:Kingston KVR1066D3N7/2GAnd besides.............SO MANY people ARE getting their x58A-UD3r boards to work with 1600 ram
SUCCESS!!!!!!!!!!!!!!!!!!How did it happen?- I took out the old ADATA ram (which didn't feature XMP)- I installed new 1600 Corsair Ram...which DOES support XMP- I set XMP in BIOS to profile 1...All measurements are reading at spec. Everything appears normal.I'd like to thank everyone...especially Dark Mantis for his help...and well...what can say...ram with no XMP feature is dangerous to configure for x58/ i7 rigs.