DL360 G6 RAM Configurator not matching manual?

[Asdf51020]

So I configure a DL360 G6 with 36G of RDIMM ram on HP's online configurator.

It says I can use 18x2GB PC3-10600R modules, and still have a memory speed of 1333 MHz.

Manual: http://h20565.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c01705733

In the manual, page 42, it shows this chart:

Populated slots (per channel) == Rank == Speeds supported (MHz)
1 == Single- or dual-rank == 1333, 1066
1 == Quad-rank == 1066
2 == Single- or dual-rank == 1066
3 == Single- or dual-rank == 800

From the manual, this means that if I have 3 populated slots per channel, only 800MHz is supported.

Why is there this inconsistancy? Which one is correct?

How do I find out what speed the RAM is operating at? BIOS?