I don't have the right RAM I guess but I binned 1 x UD5 Rev. 2.1, 1 x UD5 Rev. 3.1 and 1 x CIVE with my GTX2s, which is an o.k. SPD to use in my experience (not perfect). I tried 14 x 960T, two best chips did 438 - 442, some couldn't even set 418! Boot depending on board was 410 - 415, the rest in-O.S. i didn't find any scaling at all with VDDA or VNB.