Can you guys please check if the low profile mems you got are KVR800D2N6/2G or KVR800D2N5/2G ( and /1G for the 1GB sticks ) another way to check this is via CPU-Z under the SPD tab and look at the 400Mhz SPD profile.
Please include a screenshot and post it here so we can validate your claims.
N6 = CL6
N5 = CL5
I have 4pcs of the 2GB modules here that are N6
Picture comparison 2pcs KVR on top and 1pc Team Elite bottom.