RX 480 vs RX 580

Discussion in 'Mac Pro' started by Eneco, Oct 9, 2018.

  1. Eneco macrumors member

    Joined:
    Jul 1, 2018
    #1
    Hey folks,

    I'm running a flashed R9 280X at the moment and it is consuming too much power so the PSU fan keeps ramping up and it is annoying me. Therefore I'm looking for a more power saving GPU.

    As Apple is recommending the RX 580 for Mojave, I was wondering if the RX 480 would also be fine, as they share the same chip and the RX 580 is just a bumped version of the RX 480 with little performance gain but higher power consumption.

    Has anyone experience with a RX 480 and a cMP? How is the driver support? I guess it will be supported as long as the RX 580 is supported, because of the same architecture?
     
  2. Capt America macrumors newbie

    Joined:
    Dec 14, 2016
    #2
    I have the rx480 in 5,1 and have zero issues in windows 10 or os mojave. Fan runs normal and half the time i don't hear it. driver support is native to mac os so you don't have to worry about holding software updates. 480 is obviously older than the 580 so its possible you could pick up cheaper than 580 but a bunch of those got gobbled up when the first came out so price might be similar at this point you might consider going with 580. I don't know about the performance difference between the two but i'm sure its negligible. You get no efi boot screen either way though so the easiest way i found to switch between mac os and windows is do starup disk and boot to windows in system preferences and then when you want to boot back to mac os from windows just restart and hold cmd, option, p and r (pram reset). This also allows you to keep SIP enabled for mac os.
     
  3. Eneco thread starter macrumors member

    Joined:
    Jul 1, 2018
    #3
    Thanks for your information. Do I need any additional cables for the RX 480, or can I just use the one 6 pin to 6 pin cable I already have connected to my current GPU? Cause the RX 580 needs a special dual 6 pin to 8 pin cable.

    As far as performance goes, according to benchmarks the RX 580 is only 7% faster than the RX 480, but uses a lot more power. And since power consumption is my main priority the RX 480 seems more appealing to me.
     
  4. Capt America macrumors newbie

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    Dec 14, 2016
    #4
    Pretty sure I used the standard six pin cable. I didn’t use any dual pin cables I know that.
     
  5. Eneco thread starter macrumors member

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    Jul 1, 2018
    #5
    Alright. Are you using a reference card with a single blower type fan or an open dual fan card? How happy are you with the noise level of the GPU?
     
  6. Capt America macrumors newbie

    Joined:
    Dec 14, 2016
    #6
    reference card all the way. fan noise level is normal. it isn't very loud.
     
  7. handheldgames macrumors 68000

    handheldgames

    Joined:
    Apr 4, 2009
    Location:
    Pacific NW, USA
    #7
    I’m running a rx480 and use a dual mini pci express power to a single 6 pin connector. A rx480 with dual power connectors is a safer bet. They tweaked the initial reference design as it was shown to draw too much voltage from the pcie slot. Although I’m using a single 6 pin power version in my Mac Pro without issue. Ymmv.
     
  8. startergo macrumors 65816

    startergo

    Joined:
    Sep 20, 2018
    #8
    I am using RX-480 rebranded as 580 from DELL. Single fan 6 pin 110W. Occupies only 2 slots versus RX-580 Sapphire Pulse 2.2. I purchased originally the Pulse card but the fans were obstructed by the GT-120 in PCIE-2 or any other PCIe card in slot 2, so I replaced it with the DELL card.
     
  9. Eneco thread starter macrumors member

    Joined:
    Jul 1, 2018
    #9
    Wait. Are you using a single 6 pin connector or a dual 6 pin connector?

    What's your power connection? A single or a dual 6 pin connector?
     
  10. startergo macrumors 65816

    startergo

    Joined:
    Sep 20, 2018
    #10
    Dual, but you can use safely single. 2x75=150. The card can pull more than 75W from the 6 pin on demand. I think around 100-125 safely.
     
  11. Eneco thread starter macrumors member

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    Jul 1, 2018
    #11
    Where did you get a dual 6 pin to 6 pin cable? I couldn't find any online.
     
  12. startergo macrumors 65816

    startergo

    Joined:
    Sep 20, 2018
    #12

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11 October 9, 2018