Weird problem? (RX 470) help!

CaliciteCalicite Member Posts: 44
edited March 2018 in Mining
Hi, :|

I used my old GTX760 and new Sapphire RX 470 Mining Edition (BIOS MODED and patched driver) for about 1 month no problem.
Bought 2x RX VEGA 64 cards, but somehow 2. and 3. PCIE slot on Mobo was not working anymore.
I came up with conclusion that my old x79 Mobo is faulty.

So I bought new PC:
CPU: Threadripper 1950x
COOLER: Enermax 360mm
MOBO: MSI X399 GAMING PRO CARBON AC
RAM: G.Skill 32GB
SSD: 2x256GB ADATA SX900
PSU: RM1000i
OS: Fresh Windows 10

Now I'm running 2x RX VEGA 64 in first and second PCIE 16x slot no problem.
But when I try to add RX 470 as 3rd PCIE 4X-8x or 2nd PCIE 16x it is not detected (fans not spinning)
When I tested my old GTX 760 it is working good as 3rd GPU.

SO FAR TESTED COMBINATIONS:

Only VEGA 64
1) PCIE 16x VEGA 64 (good) 2) PCIE 16x VEGA 64 (good)

Added RX470
1) PCIE 16x VEGA 64 (good) 2) PCIE 16x VEGA 64 (not detected - fans not spinning) 3) PCIE 4x-8x RX 470 (not detected - fans not spinning)
1) PCIE 16x VEGA 64 (good) 2) PCIE 16x RX 470 (not detected - fans not spinning)

I think new Mobo this time should be OK because GTX 760 is working.
1) PCIE 16x VEGA 64 (good) 2) PCIE 16x VEGA 64 (good) 3) PCIE 4x-8x GTX 760 (good)

DDU drivers several times it does not help.
So I came up with conclusion that there is some kind of problem with RX 470.
Can it be RX 470 MODED BIOS error (Bricked) or is it somehow shorted? or maybe new Mobo CPU faulty again?

I will try USB booted force BIOS flash, can it help?
Whitch GPU (0 or 1) number should I choose if I use RX 470 as second card in second 16x slot?
Don't want flash wrong card...

So far I'm only having nothing but problems...
Too bad I didn't know that before, I regret that I ever get in to mining.... :'(

I undervolted and optimized everything but with 0,17 cents Kwh and current difficulty I will never get half of my money back.
Worst that I'm not able to use my new PC normally for work as planned and I have to live in that noise.

Comments

  • JukeboxJukebox Member Posts: 640 ✭✭✭
    leave only one working card as monitor output
    and add 470 as second.
    Start your PC, check what shown in device manager.

    I will try USB booted force BIOS flash, can it help?
    Whitch GPU (0 or 1) number should I choose if I use RX 470 as second card in second 16x slot?
    Don't want flash wrong card...


    GPU 0 in atiflash is almost always main card used for monitor output.
    Anyway use "atiflash -i" or "atiflash -ai" to list all cards recognized before any flash.
  • CaliciteCalicite Member Posts: 44
    Thank you for help!
    I'm working on it, but there is nothing on Device Manager as I told, fans are not spinning it is not recognized at all.

    I will try this method.
    But I'm a bit afraid, can faulty card damage my other components like mobo, cpu...???

    How to FIX your Bricked GPU BIOS - Bootable DOS Drive Method



  • CaliciteCalicite Member Posts: 44
    I didn't tried the USB flash method yet ,but I noticed something with my windows installation.
    It is installed as "legacy" (not "UEFI") can this be cause of the problem?

    But it looks like it is not recognized by motherboard more like hardware problem because fans on the card are not spinning at all...
  • JukeboxJukebox Member Posts: 640 ✭✭✭
    Calicite said:

    hardware problem because fans on the card are not spinning at all...

    In most cases - fans electrically powered from PCI-E slot, not from 6(8)-pin power connector.
    So if they not rotating at start -seems to be a problem with card itself.
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