@Starr: i have one module of RAM and four slots on my mainboard. me too think that it would be better to sell this one and buy 2 same modules in order to ensure that they work properly and of course to get the benefits of DC.
about latencies; i've red somewhere that the default latencies for this kingmax superram are 22.214.171.124, but that it normally works @ 2,126.96.36.199 (however, dunno on which frequency). and here are the latencies of my kingston: http://img249.imageshack.us/img249/9106/latencyyt0.jpg
(these are not the default ones, i lowered them, but i can't remember the default values
@mammikoura: i live in bosnia and herzegovina, and it's not so easy to find everything you want here. as for ebay and other similar services, it's very hard (almost impossible) to order something because my country isn't part of the paypal system.