dram voltage?

not very high, 2.3 V here but they do 560 cas4 à 2.28 V so 2.3 V is for some safety

and these are my 4th best cas4 kit... full timings are similar to those of vukashin but not exactly the same https://d1ebmxcfh8bf9c.cloudfront.net/u21439/image_id_200681.png

very good kit, I have the same kit, max on 2.3V 545@4-4-4