The main question: Why does CPU-Z report the pairs of two 2GB modules as in dual mode and the two 1GB modules as in single mode? Second, which DIMM slots are which channel to put which modules in for dual memory mode. I don 't think this is how Intel 'FLEX' memory controller technology is supposed to work from what I have read. FLEX allows two different sizes of modules to run on a machine but they are supposed to be either dual or in single mode depending on configuration of what slots they are occupying. These are the original modules as this system came with 6GB or RAM. They are identical in voltage, timing, latency and brand with the exception of the size being 2-2GB and 2-1GB modules.
Below is an illustration of is the original memory configuration. This looks like the only purpose would be to attempt to insert 3GB on each channel in belief that the different color black and blue DIMMS delineate channel separation. This machine was abandoned and given away due to a boot issue. My friend, the original owner, had taken it to a repair shop. So, I don't know if they removed the memory and reconfigured it this way or if it was original like this from the Acer factory. Just trying to figure out what memory configuration is correct
CPU_Z Memory - Dual mode with like capacity modules grouped side by side split on both colors:
CPU_Z SPD - Dual mode with like capacity modules grouped side by side split on both colors:
Below is the memory configuration that I ended up switching to and I will explain why later. I ended up with this after testing every possible config. Two of the same size pair in the same colored slot, and then one in black and one in blue. One of each size pairs in the same colored slot, and then one in black and one in blue.
CPU_Z Memory - Dual mode with on the same color:
CPU_Z SPD - Dual mode with on the same color:
My research on the web came up with no real standard on memory slot/socket color codes but most info suggest that a brand specific and discretionary. What does not make sense is that no matter where the memory modules are inserted, the 2GB mods always show in CPU-Z as dual channel mode and the 1GB modules always show running in single channel mode (UPDAT with the exception of putting 1 pair of modules both in the first group or the second group of DIMMs) as seen in the CPU-Z images. You will notice how they, along with the ones above, illustrate my point. This means or shows that when a 2GB and 1GB are inserted on the same channel, CPU-Z is reporting that channel to be running in dual and single mode simultaneously. I believe this to be impossible as I don't know any technology that allows a single memory channel to run both dual and single mode at the same time simultaneously. I am assuming something else is wrong. Perhaps CPU-Z not reporting correctly.
Below is a chart showing the test where I ran CPU-Z on both the original config and the current one I ended on, highlighting CPU-Z confusion of reporting impossibilities. I am not completely sure which two slot/sockets are channel one and which are channel two as there is no documentation to be found for this G43 MB but I am assuming the current configuration I have it on now is correct for dual channel mode.
The reason I believe the current config change to be correct and the previous one to be wrong is simply, the system booted much faster. With the original module configuration that put the same pair on separate colors made, the boot time not only increased but the boot screen and the account log-in screen after the system went into user mode would flash. Meaning it would go blank and reappear two or three times. Sometimes the account user name would appear first, followed by a blue background for a couple seconds before the default intended background would load. Also for two days the system seams more stable without the previous boot issue mentioned next. Also, it hadn't frozen up like it did with the old memory config, after going to bed without it going to sleep like it typically does. Course it needed updates and that could have been an MS update freezing while trying to download however many 100's of MB's on my depleated hotspot through my T-Mobile data service at .225Mb/s