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H170M-ITX/DL with RX 480 GPU
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DustyH View Drop Down
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    Posted: 07 Mar 2017 at 8:05am
Hi all! First, thanks in advance for any suggestions anyone can offer.
 
I just built a new PC, and am having problems with the RX 480. Specs:
 
MOBO: Asrock H170M-ITX/DL
PSU: Corsair CX430W Bronze
RAM: G.SKILL Ripjaws V Series 16GB (2 x 8GB)
CPU: Intel Core i5-7400 Kaby Lake Quad-Core 3.0 GHz
GPU: PowerColor RED DRAGON Radeon RX 480 AXRX 480 4GBD5-3DHDV2
 
History: I purchased all of this from Newegg a couple of weeks ago, got it all assembled and ran into problems immediately - no startup. I realized that the motherboard BIOS version was not compatible with the Kaby Lake CPU. I swapped the CPU out of another computer and flashed the BIOS to the new version that provides support. That was a success, and I finally got into the UEFI. The problem? It looks like this:
 
 
OK, that's bad, but I went ahead with Windows 7 (Ultimate x64) installation, hoping that graphics drivers would resolve the problem (but if it looked that way in UEFI, my hopes weren't high). I grabbed the latest drivers, installed them, aaaand:
 
 
No, still happening. The card doesn't appear to be functioning in this machine. I pulled it and stuck it into an older computer, installed the drivers, and it worked. The CPU in my older computer is an old AMD Duo, so the performance wasn't super great - I couldn't tell if the RX 480 was fully functioning or not, hard to say. No red static though!
 
I took a GTX 750ti that I had lying around and put it into the new machine - it works just fine. Same HDMI cable, so that's not the culprit either. Installed the NVIDIA drivers and it's working great. So the PCIE slot on the new MOBO is functional.
 
Next, I thought that maybe it was a PSU issue. The new PSU is only rated at 430W (but this is a mini ATX build with a single case fan - 430 should cover it, I think) so I thought I'd try it with a 500W ANTEC. Same red, distorted results.
 
I'm out of ideas, so I've got the card ready to RMA to Powercolor. I can't send it in to Newegg for a swap because I'm a big idiot and already mailed in the rebate (with the original UPC and S/N on the retail box) so they won't take it back. Powercolor called me to verify that I had done some troubleshooting, and I went back and re-seated the card just to see if it would magically work, but it's still the same.
 
ANY ideas or suggestions on what I may have missed would be awesome. I plan to wait a few days before I mail the card out, because the whole RMA process can take up to 15 business days.

Someone on the AMD forum suggested it may be a motherboard issue, so I copied my topic and posted it here.
 
Thanks in advance!
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wardog View Drop Down
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Most likely your CX430W PSU is causing this.

The recommended PSU while employing an RX 480 is 500w.


http://www.realhardtechx.com/index_archivos/Page362.htm
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DustyH View Drop Down
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Yeah!  I thought that might be the case, so I powered the whole setup with a 500W Antec PSU - same exact results.  I ended up ruling the PSU out.
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wardog View Drop Down
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Originally posted by DustyH DustyH wrote:

Yeah!  I thought that might be the case, so I powered the whole setup with a 500W Antec PSU - same exact results.  I ended up ruling the PSU out.


Well, not necessarily. Depending on how old and how hard the Antec 500w, or any other 500w, was used keep in mind PSUs over time loose their output capability.

Any friend(s) you know have a 600w or larger output PSU you might borrow to prove this wrong?


IMHO, what you are seeing is either PSU related or the RX 480 is defective.


All Stop, mid-thought on my part

Are you powering  the RX 480 via the PSU directly to the 480s onboard PCIe 8-pin connector ?? No molex to 8-pin adapter(s)?

Is the MB flashed to the latest BIOS, 7.00, available for your H170M-ITX/DL ??
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parsec View Drop Down
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While it might not be the PSU, and before you rule it out, the difference between 430W and 500W is minimal.

Plus what really matters is the power output of the +12V rail. Video cards use the +12V rail as their main power source. The labels on the PSUs will (should) show the output in Amps for each rail, 3.3V, 5V, and 12V, and a maximum watt spec for each rail. The maximum watt spec of the 12V rail matters the most.

Older PSUs provide different power outputs on the 12V and 5V rails than modern PSUs do. Older CPUs used the 5V rail for the CPU, while the 12V rail provides power to the CPU for a while now. So the older PSUs have much higher power capability on the 5V rail, while the 12V rail was secondary in output power. New PSUs are the opposite, the 12V rail has the highest power output capability, since it supplies power to the majority of hardware. If a PSU has a higher or equal power output on the 5V rail compared to the 12V rail, then it is an old style PSU and won't work well with new PC hardware.

Also, old PSUs can lose their ability to supply their specified power. Capacitors age over time, depending upon their quality. Did you check the voltage readings in the BIOS, HW Monitoring screen? You won't see them using the Easy BIOS mode. While those readings are not pin point accurate, if you see the 12V rail below 12V, that is not a good sign.

The 750Ti only draws power from the PCIe slot, and uses very little power. That did not test the 12V capability of the PSU.

One final question related to the PSU: when you checked the RX 480 in the old AMD Duo PC, what PSU is that PC using?

Otherwise, your issue is unusual. Do the screw holes in the metal retention bracket on the RX 480 line up well with the threaded holes in the PC case? I've had PC cases where that does not happen, and the PC case literally pulls on the video card's retention bracket. I assume you were able to engage the locking tab on the PCIe slot?
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