WTT 6x1gb DDR3 2000 for slower ram

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I've got 6 sticks of Kingston Hyper-X 1gb DDR3 2000 that are being severely underutilized running at 1333 in a server board. I know the particular 6 I have will run at DDR3 2133.
http://www.newegg.com/Product/Produ...17075X740592Xfb8eb5e12aed2a1e17619fe171f69668

I would like to trade these for six 2gb sticks of some slower ram, preferably 1600 but 1333 works as well. Ideal candidates would have spd tighter than 9 at 1333 or run at 1.35v or lower but I'm flexible.

These would be perfect for maxing out mem clock on a dedicated SR-2 folding rig. PM me if you have anything and we can work out details.