Believe it's called ROM (Research Overload Mania) not to be confused with ROM (Read Only Memory), and ASUS has a couple of documents on their X79 mobos and DRAM set up - they have a document on Memory in quad for X79 that states;
"4 DIMMs: Supports four (4) modules inserted into four blue slots(P9X79 series) / beige
slots(TUF series) / red slots(ROG series) as two pairs of Quad-channel
memory configuration."
which can be confusing due to the 'two pairs'
whereas in your manual on page 2-13 as you mention, it states:
"4 DIMMs: Supports four (4) modules inserted into either the blue slots or the black slots as one DIMM per channel for Quad-channel memory configuration.We suggest that you install the modules into slots A1/B1/C1/D1 for better compatibility."
which simply means Quad channel configuration, where as with the 8 sticks you have:
"8 DIMMs: Supports eight (8) modules inserted into all the blue and black slots as full-loading of Quad-channel memory configuration"
Which basically means the max quad config, with my word of max meaning all slots are filled, what can be surprising is that with 4 sticks you might see a higher bandwidth (slightly) than you see with 8 sticks, since 8 will put more strain on the MC, same thing happens with DUAL and Tri channel mobos.
Their descriptions and what they are trying to say is often lacking as it is often translated by different people in their documentation shops and different folks translate differently.
In basic English the MC (Memory Controller) in the 2011 socket CPUs can handle up to four channels of DRAM, (say A, B, C, and D) each channels can accommodate 2 sticks of DRAM. In single channel mode the DRAM is handled in 64 bit chunks, dual is in 128, tri in 192 and quad in 256 bit chunks. The second slot of each channel is to add additional memory to that channel.
or on say a dual channel board you have channel A (1 & 2) and B (1 & 2). if only in A1 = single channel 64 bit or A1 and B1 = dual channel 128 bit opeeration....but if you put the two sticks in A1 and A2 you still have two sticks but they are both work in 64 bit mode.
I may still have the original data sheets from Intel as to how the architecture is laid out with 8 slot mobos got the X79, if I can find them I'll let you know (though to be honest, I've prob already tossed them, that was from a while ago)
"4 DIMMs: Supports four (4) modules inserted into four blue slots(P9X79 series) / beige
slots(TUF series) / red slots(ROG series) as two pairs of Quad-channel
memory configuration."
which can be confusing due to the 'two pairs'
whereas in your manual on page 2-13 as you mention, it states:
"4 DIMMs: Supports four (4) modules inserted into either the blue slots or the black slots as one DIMM per channel for Quad-channel memory configuration.We suggest that you install the modules into slots A1/B1/C1/D1 for better compatibility."
which simply means Quad channel configuration, where as with the 8 sticks you have:
"8 DIMMs: Supports eight (8) modules inserted into all the blue and black slots as full-loading of Quad-channel memory configuration"
Which basically means the max quad config, with my word of max meaning all slots are filled, what can be surprising is that with 4 sticks you might see a higher bandwidth (slightly) than you see with 8 sticks, since 8 will put more strain on the MC, same thing happens with DUAL and Tri channel mobos.
Their descriptions and what they are trying to say is often lacking as it is often translated by different people in their documentation shops and different folks translate differently.
In basic English the MC (Memory Controller) in the 2011 socket CPUs can handle up to four channels of DRAM, (say A, B, C, and D) each channels can accommodate 2 sticks of DRAM. In single channel mode the DRAM is handled in 64 bit chunks, dual is in 128, tri in 192 and quad in 256 bit chunks. The second slot of each channel is to add additional memory to that channel.
or on say a dual channel board you have channel A (1 & 2) and B (1 & 2). if only in A1 = single channel 64 bit or A1 and B1 = dual channel 128 bit opeeration....but if you put the two sticks in A1 and A2 you still have two sticks but they are both work in 64 bit mode.
I may still have the original data sheets from Intel as to how the architecture is laid out with 8 slot mobos got the X79, if I can find them I'll let you know (though to be honest, I've prob already tossed them, that was from a while ago)
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