ram install slots: which location?

it is  quad channel

DIMM# are symmetrically assigned, like mirror image

https://i.dell.com/sites/csdocuments/Shared-Content_data-Sheets_Documents/en/al/CSG-EN-XX-ALL-Dell-Precision-Tower-5810-spec-sheet.pdf

mobo silkscreen

manual may have an error in notation

"chassis" 1, 2, 3, 4 should be "channel" 1, 2, 3, 4

DIMM convention:

white slot is slot 1 of a memory channel.

DIMM1 white: slot 1 of ch0

DIMM2 white: slot 1 of ch1

DIMM3 white: slot 1 of ch2

DIMM4 white: slot 1 of ch3

DIMM convention: 

black slot is slot 2 of a memory channel

DIMM5 black: slot 2 of ch0

DIMM6 black: slot 2 of ch1

DIMM7 black: slot 2 of ch2

DIMM8 black: slot 2 of ch3

no.. what im looking for (and the manual should have done it this way) is, 

channel 0, sub 0 = DIMM #__

channel 0, sub 1 = DIMM #__

etc.. DIMM #'s on the chart.. this would be totally clear

aarrgh.. i see my first reply did not go thru..

which was thanx..

and for this one.. thanx again..  

yw.  I will let mod know and perhaps they can update the manual

In the Precision 5810, support memory configurations can be installed as follow:

1 stick of RAM, install to DIMM1

2 sticks of RAM, install to DIMM1  +  DIMM2

4 sticks of RAM, install to DIMM1  +  DIMM2  +  DIMM3  +  DIMM4

8 sticks of RAM, install to all DIMM slots.

System will support these sticks of RDIMM RAM:  4GB, 8GB, 16GB, and 32GB.

DIMM slot numbering is imprinted on motherboard and electrical overview label on side panel.

For some working unsupported memory configurations, install the extra stick(s) to the next numbering DIMM slot

So say I have 3 of 8gb sticks and like 8 of 4 gb, can i use the 8gb sticks like even 2 or is that a bad idea