Does Aspire XC 1785 support Resizable Bar for Intel Arc 380 GPU?

Gregory183
Gregory183 Member Posts: 6 New User

I'm planning to add a dedicated GPU on my XC 1785 and one of the option that I've considered is Intel Arc 380 which required Resizable Bar (ReBar). Does the ReBar option available on XC1785?

Answers

  • Puraw
    Puraw ACE, Member Posts: 15,769 Trailblazer

    The Acer Aspire XC-1785 does not support Resizable Bar. This feature is typically found in higher-end gaming desktops and laptops, and it allows the CPU to access the entire GPU frame buffer, which can improve performance in certain games and applications.

  • Gregory183
    Gregory183 Member Posts: 6 New User

    Thanks for the information, considering A380 is not suitable due to ReBar issues, does gpu such as RTX 3050 or RX 6400 can fit to the XC1785 case?

  • billsey
    billsey ACE Posts: 35,676 Trailblazer

    IIRC the XC-1785 has a pretty standard sized slim tower case. You might have to use a low profile card, but I wouldn't be surprised if a normal card would fit. Measure twice… :)

    Click on "Like" if you find my answer useful or click on "Yes" if it answers your question.
  • Gregory183
    Gregory183 Member Posts: 6 New User

    Just an update on the ReBar option, seems mine have the option in the Bios afterall after checking it back yesterday, might getting the Intel A380 afterall since it's hard to get GPU that can fit into XC 1785

  • JonBlund
    JonBlund Member Posts: 16 Troubleshooter
    edited March 7

    XC-1785 has a 180W power supply.
    An Intel i5 can use up to160W.
    Intel Arc 380 up to 75W.
    sata, usb, mainboard, disks and memory actually use power too.

    A PSU less than 250W is no good. Intel recommends 300W for this combo.

    My advice: Think of something less demanding for your PCIe slot.

  • Gregory183
    Gregory183 Member Posts: 6 New User

    Currently waiting for new psu with 500W which recommended from other forums for XC-1785 to arrive. Once tested and everything run smoothly should be no issues on power requirement for the gpu as long as it was a Low Profile gpu. The main concern right now to find one that can fit on the XC-1785 SFF cases.

  • billsey
    billsey ACE Posts: 35,676 Trailblazer

    Be aware that the XC-1785 uses an ATX12VO power supply, which has different connectors than the typical old style ATX supplies.

    Click on "Like" if you find my answer useful or click on "Yes" if it answers your question.
  • JonBlund
    JonBlund Member Posts: 16 Troubleshooter

    Since the motherboard is for an ATX 12V only power supply, it means that all other voltages are generated from dc-dc converters on the motherboard. These converters have a given capacity independent of the ATX power that is supplied.

    Since there is only one full lenght PCIe slot and such slots only support 75W of power as a maximum, you will have more than 200W of power that can never be used.

    The next problem is that the xc-1785 motherboard is a board that do not follow the standard. Do the PCIe slot really support 75W? I may or it may not. Nobody actually knows.