Which memory speed is the right for my mobo?

Hello, im just worried which memory speed is supported by my mobo: ASrock Conroe1333-DVI/H. In the manual it says: Dual Channel DDR2 667 tecnology, but i maked 2 test, on in crucial site and the other in corsair site and they both displayed it can run PC2-8500, PC2-6400 and PC2-5300. So im confused which to choose, 667 mhz, 800 mhz or 1066mhz.

Thx alot.
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More about which memory speed mobo
  1. Your board runs at pc5300 speed (which is the same as ddr2 667). But if you find ddr2 800 (pc6400) for less, then you can use that memory. The board will default to the lower speed. I use micron and samsung memory on my asrock board. Use pairs only that are rated for the same speed; I have one pair of micron and one pair of samsung pc5300 in the 4 slots; all are color coded, with one branded pair in the yellow slots, and the other in the orange slots.
  2. Thanks for you reply brother =)
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