Topic: ZCASH mining with gtx1080 observation regarding memory (Read 185 times)

From what I understood zcash is one of the coins that ANT miner can not take advantage of because its algorithm:  equihash depends on memory availability not the hashing speed. (I probably need to read more on this).
Now I had two gtx1080 equipped system started mining zcash from pool and see statistics below:
Both has 8GB DDR5X but only appears to be using 700MB for mining. Does that mean it is not utilizing its memory to its full potential and buying 11GB DDR5 edition will give no performance improvement? The quote below is taken from zcash web but not sure which memory it is referring to:
GPU memory 8GB
System mapped GPU memory (i.e. standard BAR address) usually 256MB for graphics
System main memory DDR4/3 etc interfaced to main processor.

And does anyone knows good technically sound crypto books and/or online resource on latest mining algorithms? I do have a very good book but it mostly covers older hashing and encryption algorithm i.e. SHA, RSA, but not Scrypto, Equihash. I dont know look through online crap articles on something written by non-technicals.

Thanks!

[root@MINER-Z270-SLI ~]# nvidia-smi -q | egrep "GPU 0|Power Draw|Current.*Temp|Product Name|MHz|MiB"
GPU 00000000:01:00.0
    Product Name                    : GeForce GTX 1080
        Total                       : 8114 MiB
        Used                        : 637 MiB
        Free                        : 7477 MiB
        Total                       : 256 MiB
        Used                        : 2 MiB
        Free                        : 254 MiB
        GPU Current Temp            : 64 C
        Memory Current Temp         : N/A
        Power Draw                  : 181.74 W
        Graphics                    : 1885 MHz
        SM                          : 1885 MHz
        Memory                      : 4513 MHz
        Video                       : 1695 MHz
        Graphics                    : 1974 MHz
        SM                          : 1974 MHz
        Memory                      : 5005 MHz
        Video                       : 1708 MHz
            Used GPU Memory         : 627 MiB
GPU 00000000:02:00.0
    Product Name                    : GeForce GTX 1080
        Total                       : 8114 MiB
        Used                        : 637 MiB
        Free                        : 7477 MiB
        Total                       : 256 MiB
        Used                        : 2 MiB
        Free                        : 254 MiB
        GPU Current Temp            : 61 C
        Memory Current Temp         : N/A
        Power Draw                  : 192.67 W
        Graphics                    : 1936 MHz
        SM                          : 1936 MHz
        Memory                      : 4513 MHz
        Video                       : 1733 MHz
        Graphics                    : 1974 MHz
        SM                          : 1974 MHz
        Memory                      : 5005 MHz
        Video                       : 1708 MHz
            Used GPU Memory         : 627 M


https://z.cash/blog/why-equihash

"Equihash is a memory-oriented Proof-of-Work, which means how much mining you can do is mostly determined by how much RAM you have. We think it is unlikely that anyone will be able to build cost-effective custom hardware (ASICs) for mining in the foreseeable future.
"