Acer Predator 17 Ram Upgrade - G9-793-78RV

Dutch_H
Dutch_H Member Posts: 17 Troubleshooter
edited November 2023 in 2018 Archives
Hey Fellas.

I own a G9-793-78RV and I am looking at upgrading the ram. It currently has 16gb in one slot. If I get another 16gb stick which slot do I have to put it in for it to operate via dual channel. Can any of the slots in the access panel provide dual channel with the stick already installed under the keyboard?

Thanks for your help.

Answers

  • JackE
    JackE ACE Posts: 44,897 Trailblazer
    edited June 2018
    No. The pair of DDR4 modules should be in the pair of slots on the same side of mainboard. One pair of slots is on the bottom of the mainboard. The other pair of slots is on top of the mainboard. Hope your existing 16GB module is the easiest to access.  :) Jack E/NJ

    Jack E/NJ

  • sri369
    sri369 ACE Posts: 2,774 Pathfinder
    Dutch_H said:
    Hey Fellas.

    I own a G9-793-78RV and I am looking at upgrading the ram. It currently has 16gb in one slot. If I get another 16gb stick which slot do I have to put it in for it to operate via dual channel. Can any of the slots in the access panel provide dual channel with the stick already installed under the keyboard?

    Thanks for your help.
    Out of curiosity, why do you want to bump it to 32, for nearly all our latest games on Ultra @ full HD don't use even the 16 GB RAM to fullest extent!
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  • Dutch_H
    Dutch_H Member Posts: 17 Troubleshooter
    Thanks for the responses. I believe the 16gb is in the hard to access spot unfortunately. Sri369 I wanted to add ram in dual channel as evidence shows you get much better performance having ram run in dual channel.
  • sri369
    sri369 ACE Posts: 2,774 Pathfinder
    edited July 2018
    @Dutch_H

    Good you pointed it out...

    If you have two different RAM in two slots, they both would run at speeds of slower RAM.
    So, if you have a single channel RAM running at slower speeds, and now you place this newer faster RAM in the second slot, it won't help you for it would run at the speed of slower RAM. You would need to change both, or at the very least remove the slower RAM, to utilize the higher speeds of the new one.

    Generally speaking, you can install a second RAM stick and the RAM will operate in dual channel mode. I say generally, because it is recommended you purchase "matched pairs" RAM to guarantee the RAM will work in dual channel mode because they have been verified to do so. Having said that, the chances of using unmatched paired of RAM (or mix and match) and still operate in dual mode is pretty good.

    Typically speaking, you want both RAM sticks to be of the same capacity because that will give you the best performance. Especially if the RAM are matched pairs because they are guaranteed to work in dual channel mode with each other. However, mixing different RAM capacities is not the end of the world. There was an article I read couple of years ago which tested RAM used in dual channel mode. Basically, using unmatched pairs of different RAM capacities yielded about 95% the performance compared to using matched paired of RAM where both sticks are the same capacity.
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  • Dutch_H
    Dutch_H Member Posts: 17 Troubleshooter
    sri369 said:
    @Dutch_H

    Good you pointed it out...

    If you have two different RAM in two slots, they both would run at speeds of slower RAM.
    So, if you have a single channel RAM running at slower speeds, and now you place this newer faster RAM in the second slot, it won't help you for it would run at the speed of slower RAM. You would need to change both, or at the very least remove the slower RAM, to utilize the higher speeds of the new one.

    Generally speaking, you can install a second RAM stick and the RAM will operate in dual channel mode. I say generally, because it is recommended you purchase "matched pairs" RAM to guarantee the RAM will work in dual channel mode because they have been verified to do so. Having said that, the chances of using unmatched paired of RAM (or mix and match) and still operate in dual mode is pretty good.

    Typically speaking, you want both RAM sticks to be of the same capacity because that will give you the best performance. Especially if the RAM are matched pairs because they are guaranteed to work in dual channel mode with each other. However, mixing different RAM capacities is not the end of the world. There was an article I read couple of years ago which tested RAM used in dual channel mode. Basically, using unmatched pairs of different RAM capacities yielded about 95% the performance compared to using matched paired of RAM where both sticks are the same capacity.
    Thanks for the response. I am confused with JakeE's response as I have seen videos and some other threads saying they have installed a new chip in the easy access panel and it runs dual channel. So one is under the keyboard (hard to access) and the other is in the access panel. Can someone please confirm? Is there an Acer document for my model which will tell me which slots are matched for dual channel? I want to confirm before making the purchase as accessing the ram under the keyboard will be a mission.

    Thanks.
  • JackE
    JackE ACE Posts: 44,897 Trailblazer
    The ram specs are dual-channel DDR4 SDRAM with up to 16 GB factory installed. Upgradable to 64 GB using four DIMM modules for
    quadruple-core CPU under 64-bit OS. Jack E/NJ



    Jack E/NJ

  • Dutch_H
    Dutch_H Member Posts: 17 Troubleshooter
    JackeE.

    CPU Z tells me the current SODIMM is in slot 3 which i suspect is 1601?. So if I got another and placed it in 1600 it should work dual channel correct?

    Thanks mate.
  • sri369
    sri369 ACE Posts: 2,774 Pathfinder
    You guys are lucky, to have 4 slots. My G3-572 comes with only 2 slots :-( So, to upgrade, I would have to replace RAM, instead of just adding.
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  • JackE
    JackE ACE Posts: 44,897 Trailblazer
    @Dutch_H Should really be a matched pair or at least the same specs. You should also be able to double-check CPU-Z by opening bottom RAM access panel to see if 1601 and 1602 are indeed empty. Bottom might be # 3 & # 4 if your lucky unlike @sri369 :) Jack E/NJ

    Jack E/NJ

  • Dutch_H
    Dutch_H Member Posts: 17 Troubleshooter
    edited July 2018
    JackE.

    I opened the access panel and there are no ram slots taken up. CPU-Z tells me the current 16GB SODIMM is in slot 3. So looking at the pic you shared that is either in 1600 or 1700. With Dual Channel if it is in 1600 do I need to place the other module in 1601 or 1701? Vise versa if it is in 1700?

    Thanks mate.
  • JackE
    JackE ACE Posts: 44,897 Trailblazer
    I'd put both modules in the easier to access pair. Should be 1601/1701 or # 1/# 2. On first boot, start tapping F2 to enter BIOS menu to make sure modules are both recognized. Save settings and exit. Jack E/NJ

    Jack E/NJ

  • Dutch_H
    Dutch_H Member Posts: 17 Troubleshooter
    Update. I purchased the G.Skill 16gb module. Installed in top slot and running perfectly. CPU-Z states dual channel. Performance in Battlefield 1 has increased dramatically. Little tip for anyone with one stick of RAM in single channel. Get another for dual and performance for games like Battlefield 1 will improve greatly. I want a steady 75fps for my monitor's refresh rate and was getting dips into the 30s. Now a steady 75fps at all times besides a very rare occasion such as flying a plane high and seeing the whole map with lots of action. Yet only a slight slow down and nothing like before. Very happy. Appreciate all the help and advice.
  • Goldark
    Goldark Member Posts: 16 Troubleshooter
    Dutch_H said:
    Update. I purchased the G.Skill 16gb module. Installed in top slot and running perfectly. CPU-Z states dual channel. Performance in Battlefield 1 has increased dramatically. Little tip for anyone with one stick of RAM in single channel. Get another for dual and performance for games like Battlefield 1 will improve greatly. I want a steady 75fps for my monitor's refresh rate and was getting dips into the 30s. Now a steady 75fps at all times besides a very rare occasion such as flying a plane high and seeing the whole map with lots of action. Yet only a slight slow down and nothing like before. Very happy. Appreciate all the help and advice.
    Hi Dutch,

    How much did the new RAM run you?  I'm seeing performance dips in Quake Champions and am thinking of upgrading down the line...
  • Dutch_H
    Dutch_H Member Posts: 17 Troubleshooter
    Goldark said:
    Dutch_H said:
    Update. I purchased the G.Skill 16gb module. Installed in top slot and running perfectly. CPU-Z states dual channel. Performance in Battlefield 1 has increased dramatically. Little tip for anyone with one stick of RAM in single channel. Get another for dual and performance for games like Battlefield 1 will improve greatly. I want a steady 75fps for my monitor's refresh rate and was getting dips into the 30s. Now a steady 75fps at all times besides a very rare occasion such as flying a plane high and seeing the whole map with lots of action. Yet only a slight slow down and nothing like before. Very happy. Appreciate all the help and advice.
    Hi Dutch,

    How much did the new RAM run you?  I'm seeing performance dips in Quake Champions and am thinking of upgrading down the line...
    Hey Goldark.

    16gb SODIMM 2133mhz was $230 Australian. It is good to have 32gb yet it gets a bit rich when you go big capacity modules. I think 2 x 8gb would of been fine at this moment. However I already had one 16gb from the factory so wanted to keep it the same. I purchased the below ram in the link.

    https://www.mwave.com.au/product/gskill-ripjaws-16gb-1x-16gb-ddr4-2133mhz-sodimm-memory-ab69560

    Have a good day Bro.

    Dutch_H
  • Red-Sand
    Red-Sand ACE Posts: 1,892 Pathfinder
    Nice work! & good choice to keep dual channel!
    - Hotel Hero
  • JordanB
    JordanB ACE Posts: 3,729 Pathfinder
    edited July 2018
    Here's some more info....
    Note: The memory combinations below don't necessarily imply that other combinations aren't possible.  They are just the combinations that Acer listed in specs......and I assume they tested.






    I'm not an Acer employee.
  • Dutch_H
    Dutch_H Member Posts: 17 Troubleshooter
    Red-Sand said:
    Nice work! & good choice to keep dual channel!
    Thanks Red-Sand. Very happy with it.

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