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Not detecting third GPU using EVGA X58 Sli

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Abison
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2017/01/19 18:33:34 (permalink)
Hello, first of all, excuse my english, i'm not fluent.

I'm trying to connect three RX 470 onto my X58 Sli but it only recognizes two, the third one its not recognized and doesn't even appear in the device manager menu.

I'm running Windows 10, 64 bits, 8 GB of ram and i'm connecting the GPU's in the PCI-Express X16 and X8 slots, the first X16 and the third X8 slots GPU are the ones being recognized. Please help!



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    HeavyHemi
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    Re: Not detecting third GPU using EVGA X58 Sli 2017/01/19 19:26:10 (permalink)
    Abison
    Hello, first of all, excuse my english, i'm not fluent.

    I'm trying to connect three RX 470 onto my X58 Sli but it only recognizes two, the third one its not recognized and doesn't even appear in the device manager menu.

    I'm running Windows 10, 64 bits, 8 GB of ram and i'm connecting the GPU's in the PCI-Express X16 and X8 slots, the first X16 and the third X8 slots GPU are the ones being recognized. Please help!





    Hello and welcome to the forum. Have you tested each GPU individually? Does it show up as a device being recognized in the BIOS? You should see it during the POST screen (not in the BIOS) with an assigned IRQ. Have you set the 'memory low gap to 3GB in the BIOS?

    EVGA X99 FTWK / i7 6850K @ 4.5ghz / RTX 3080Ti FTW Ultra / 32GB Corsair LPX 3600mhz / Samsung 850Pro 256GB / Be Quiet BN516 Straight Power 12-1000w 80 Plus Platinum / Window 10 Pro
     
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    Abison
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    Re: Not detecting third GPU using EVGA X58 Sli 2017/01/20 01:07:38 (permalink)
    HeavyHemi
    Abison
    Hello, first of all, excuse my english, i'm not fluent.

    I'm trying to connect three RX 470 onto my X58 Sli but it only recognizes two, the third one its not recognized and doesn't even appear in the device manager menu.

    I'm running Windows 10, 64 bits, 8 GB of ram and i'm connecting the GPU's in the PCI-Express X16 and X8 slots, the first X16 and the third X8 slots GPU are the ones being recognized. Please help!





    Hello and welcome to the forum. Have you tested each GPU individually? Does it show up as a device being recognized in the BIOS? You should see it during the POST screen (not in the BIOS) with an assigned IRQ. Have you set the 'memory low gap to 3GB in the BIOS?



    I've tested every GPU individually, yes. And I don't see it shows any GPU at all in the post screen, but maybe I'm dumb, what exactly I'm looking for in the post screen and whats an IRQ?
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    HeavyHemi
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    Re: Not detecting third GPU using EVGA X58 Sli 2017/01/20 17:07:06 (permalink)
    Abison
    HeavyHemi
    Abison
    Hello, first of all, excuse my english, i'm not fluent.

    I'm trying to connect three RX 470 onto my X58 Sli but it only recognizes two, the third one its not recognized and doesn't even appear in the device manager menu.

    I'm running Windows 10, 64 bits, 8 GB of ram and i'm connecting the GPU's in the PCI-Express X16 and X8 slots, the first X16 and the third X8 slots GPU are the ones being recognized. Please help!





    Hello and welcome to the forum. Have you tested each GPU individually? Does it show up as a device being recognized in the BIOS? You should see it during the POST screen (not in the BIOS) with an assigned IRQ. Have you set the 'memory low gap to 3GB in the BIOS?



    I've tested every GPU individually, yes. And I don't see it shows any GPU at all in the post screen, but maybe I'm dumb, what exactly I'm looking for in the post screen and whats an IRQ?


    While the computer is booting, you will see text on the screen. It flashes by fairly quickly, but it should list all the devices that are detected by the motherboard. You should see three graphic devices listed.
    An IRQ is a hardware interrupt. The motherboard assigns them automatically, it's just something you should see listed as the sytem boots. There should be three that are the same device, which would be the GPU's you have installed. I forgot to ask, what BIOS version are you using? Is your board the E758 model? How about a few more details on your system?
    post edited by HeavyHemi - 2017/01/20 17:14:35

    EVGA X99 FTWK / i7 6850K @ 4.5ghz / RTX 3080Ti FTW Ultra / 32GB Corsair LPX 3600mhz / Samsung 850Pro 256GB / Be Quiet BN516 Straight Power 12-1000w 80 Plus Platinum / Window 10 Pro
     
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