Can't find stable settings for PowerColor RX 480 Red Dragon 8GB

[iamnoobplzhelp]

These were on sale at Newegg a while ago and were part of my original mining rig. I have since then setup a few others, and I'm trying to go back and get this one optimized, but these cards are giving me so much grief.

They have Samsung memory, so I have just copied the 1750 straps down to the 2000.

Other than that, even a slight overclock is causing errors. To get them stable, I've had to underclock them to 1980 and up the voltage, but they only do ~24.7 MH/s with these settings. Are these cards just super shitty? What am I missing?

I've seen posts where people have gotten these to over 30mh/s, but I can't seem to get to those settings. Anyone have any other tips or hints?

[philipma1957]

These were on sale at Newegg a while ago and were part of my original mining rig. I have since then setup a few others, and I'm trying to go back and get this one optimized, but these cards are giving me so much grief.

They have Samsung memory, so I have just copied the 1750 straps down to the 2000.

Other than that, even a slight overclock is causing errors. To get them stable, I've had to underclock them to 1980 and up the voltage, but they only do ~24.7 MH/s with these settings. Are these cards just super shitty? What am I missing?

I've seen posts where people have gotten these to over 30mh/s, but I can't seem to get to those settings. Anyone have any other tips or hints?

first of all  with no flash  they do 27mh with smOS 

or 28mh with  windows 7  and  msi afterburner.

so you did a bad flash


Did you ever run them  using  smOS before the bios flash?

Did you ever run them using win 7/win 10 using msi afterburner before the bios flash?

Based on what you wrote you did not do that so you fucked up since you now have no idea what they do before a flash.

So the simple question is are you capable of restoring the bios to stock?

Once you restore it to stock.

Run smOS  and see what they  clock to.

Never flash  until you run stock  on smOS and win 7 and win 10

Most people just go right to flash  and some have your issue.

[iamnoobplzhelp]

I do have the original ROMs, so I can flash back at anytime.

I'm not familiar with smOS. What is that?

And yes, I ran them stock in Windows 10, and they only do ~24mh/s. Overclocking did nothing to change the mh/s.

The ONLY modification I did to the bios, using Polaris, was to copy the 1750 straps down to 2000. I use Watttool to modify the clocks/voltages after using modified bios.

[philipma1957]

I do have the original ROMs, so I can flash back at anytime.

I'm not familiar with smOS. What is that?

And yes, I ran them stock in Windows 10, and they only do ~24mh/s. Overclocking did nothing to change the mh/s.

The ONLY modification I did to the bios, using Polaris, was to copy the 1750 straps down to 2000. I use Watttool to modify the clocks/voltages after using modified bios.

simple mining os

It is a Linux on a USB stick os

You should get more like 27mh with that card.

There is a thread on simplemining os in this section of the website.

[xleejohnx]

I do have the original ROMs, so I can flash back at anytime.

I'm not familiar with smOS. What is that?

And yes, I ran them stock in Windows 10, and they only do ~24mh/s. Overclocking did nothing to change the mh/s.

The ONLY modification I did to the bios, using Polaris, was to copy the 1750 straps down to 2000. I use Watttool to modify the clocks/voltages after using modified bios.

copy the 1500 strap down

also here is the original so you can start fresh
https://drive.google.com/open?id=0B0614dRHRS0Rcm9lXy05T3JzVW8

[iamnoobplzhelp]

I do have the original ROMs, so I can flash back at anytime.

I'm not familiar with smOS. What is that?

And yes, I ran them stock in Windows 10, and they only do ~24mh/s. Overclocking did nothing to change the mh/s.

The ONLY modification I did to the bios, using Polaris, was to copy the 1750 straps down to 2000. I use Watttool to modify the clocks/voltages after using modified bios.

copy the 1500 strap down

also here is the original so you can start fresh
https://drive.google.com/open?id=0B0614dRHRS0Rcm9lXy05T3JzVW8

Why do you say copy the 1500 straps down? This is normal advice for Hynix memory cards, but for Samsung, everything that I've read says only copy the 1750 down.

[philipma1957]

I do have the original ROMs, so I can flash back at anytime.

I'm not familiar with smOS. What is that?

And yes, I ran them stock in Windows 10, and they only do ~24mh/s. Overclocking did nothing to change the mh/s.

The ONLY modification I did to the bios, using Polaris, was to copy the 1750 straps down to 2000. I use Watttool to modify the clocks/voltages after using modified bios.

copy the 1500 strap down

also here is the original so you can start fresh
https://drive.google.com/open?id=0B0614dRHRS0Rcm9lXy05T3JzVW8

Why do you say copy the 1500 straps down? This is normal advice for Hynix memory cards, but for Samsung, everything that I've read says only copy the 1750 down.

how about it does not work on that card?

which is why flashing cards can be a bitch.

as long as you can set to stock  why not try 1500

[xleejohnx]

I do have the original ROMs, so I can flash back at anytime.

I'm not familiar with smOS. What is that?

And yes, I ran them stock in Windows 10, and they only do ~24mh/s. Overclocking did nothing to change the mh/s.

The ONLY modification I did to the bios, using Polaris, was to copy the 1750 straps down to 2000. I use Watttool to modify the clocks/voltages after using modified bios.

copy the 1500 strap down

also here is the original so you can start fresh
https://drive.google.com/open?id=0B0614dRHRS0Rcm9lXy05T3JzVW8

Why do you say copy the 1500 straps down? This is normal advice for Hynix memory cards, but for Samsung, everything that I've read says only copy the 1750 down.

All you did by copying the 1750 strap to the 2000 strap was throw a hotdog down a hallway
Those timings are basically almost the same.
You need tighter timings in order to increase hash rate

[iamnoobplzhelp]

I've tried all of the Ubermix timings for RX480 Samsung memory located on this page:
http://www.overclock.net/t/1604567/polaris-bios-editing-rx5xx-rx4xx
They all produce GPU errors.

Are there other timings that I should be trying?

All of the other cards I have I've been able to optimize using the methods I've described above. It's just this damn card I can't seem to get stable no matter what.

[iamnoobplzhelp]

I do have the original ROMs, so I can flash back at anytime.

I'm not familiar with smOS. What is that?

And yes, I ran them stock in Windows 10, and they only do ~24mh/s. Overclocking did nothing to change the mh/s.

The ONLY modification I did to the bios, using Polaris, was to copy the 1750 straps down to 2000. I use Watttool to modify the clocks/voltages after using modified bios.

copy the 1500 strap down

also here is the original so you can start fresh
https://drive.google.com/open?id=0B0614dRHRS0Rcm9lXy05T3JzVW8

Why do you say copy the 1500 straps down? This is normal advice for Hynix memory cards, but for Samsung, everything that I've read says only copy the 1750 down.

how about it does not work on that card?

which is why flashing cards can be a bitch.

as long as you can set to stock  why not try 1500

I've tried copying the 1500s down. It produces errors in HWInfo, artifacts, then crash.

[rednoW]

this card has no memorychips cooling. Make sure you have a good airflow and try to downvolt gpu and mem controller as much as possible.
Mine is running fine 1170/2040@30.2mhs, only 72w@gpu-z.

[iamnoobplzhelp]

this card has no memorychips cooling. Make sure you have a good airflow and try to downvolt gpu and mem controller as much as possible.
Mine is running fine 1170/2040@30.2mhs, only 72w@gpu-z.

Awesome! Thanks! What are your voltages?

And did you just copy the 1750 timings down to 2000? Or did you do something else?

[rednoW]

this card has no memorychips cooling. Make sure you have a good airflow and try to downvolt gpu and mem controller as much as possible.
Mine is running fine 1170/2040@30.2mhs, only 72w@gpu-z.

Awesome! Thanks! What are your voltages?

And did you just copy the 1750 timings down to 2000? Or did you do something else?

0.9v gpu, 0.875v mem controller, I'm using UberMix 3.1 timings

[iamnoobplzhelp]

this card has no memorychips cooling. Make sure you have a good airflow and try to downvolt gpu and mem controller as much as possible.
Mine is running fine 1170/2040@30.2mhs, only 72w@gpu-z.

Awesome! Thanks! What are your voltages?

And did you just copy the 1750 timings down to 2000? Or did you do something else?

0.9v gpu, 0.875v mem controller, I'm using UberMix 3.1 timings

Thanks for the info. I guess I gotta try the UberMix 3.1 again. When I tested it before, I had it in an enclosed case, so maybe the VRM was overheating and shutting down. I have an open case with lots of fans that is their permanent home.

[iamnoobplzhelp]

The Ubermix 3.1 was still a bit unstable for me. I do have a card that's at 68% asic quality.

With the Ubermix 2.3 I was able to get 29.5mh/s. Stable for 2 hours so far. Thanks for the help!