Topic: Sapphire Nitro+ RX 570 OC 4gb - can't get it past 25mh/s (Read 204 times)

Here is the link to my bios. https://ufile.io/so09c

I made a mistake, my core clock is 1150 and not 1050.

I would very much like to see your BIOS, yes.  Now after adjusting to 2000 in memclock, the 6gpu rig have been running for over 6 hours on 181 mh/s so that is a new record!  Thanx for inputs

The card with 2090 memclock, if I bump it up to 2100 then I get lots of incorrect shares and about millions of error on HWInfo and sometimes it will hang. Going down by 10 gives me little error wiithout really affecting the hash rate compared to the other card. And if I remember right, all my voltage is set to 900 and I use Trixx to lower it even more. I can upload my bios if you want.

Wow, so you actually just lower the memclock by 10, and the card is running?
I'll have some work to do.. The problem is that when i run 1 single card, it is no problem getting 29-30 mh/s. It is when i run more than 3 in windows..
So I'll do some testing in ethOS just by changing the memclock to 2000.  on that exact card.. That gave me 29 mh/s.   I'll see if i have to go lower....                       I am not familiar enough with ethOS to know if there is a "HWinfo" program working on it.. I get sick from windows  

The cards that need lower memclock. do they need higher voltage?

I have the same exact card. Currently hashing at around 31mh/s using claymore 11.5, my bios setup are core clock 1050, memclock at 2100, I have to lower memclock to one card to 2090 because of mem errors. And I'm using Trixx to undervolt and getting 910watts for 6 cards in dual mining and about 770watts in ETH mode.

https://s17.postimg.org/bmu8337in/claymore1.png

I had my better half aka "The Dragon" Swap the GPU connections to the PCI-slots.  So I know in fact now that there is 1 of the GPU's that got trouble.
I used atiflash in ethOS to mod the BIOS.  The Bios is working great on all the other cards. Hashing 30+ mh/s.

Cards are Sapphire Nitro+ OC RX570 4gb elphida

Anyhow. The rig, while running on Windows, ran without any problems for 1,5 month. The trouble just happened out of nothing.  Thread stuck in device. Blue screen.. A pain in the A**. That is why I switched to ethOS.  Also I could not run more than 3 cards with modded BIOS without the bluescreens... On the best i ran 3 GPUs on 29 and 3 on 25..


The Windows "project" took so much time with the reebots, blue screens and everything.. Ethos was set up in "no time" compared to windows

So I have an Idea. The BIOS switch on the GPU, what do that do?  Does it use another memory on the GPU?   Can I install the modded BIOS on the switched side and remove the problem? Is this possible?

Or If i lower the mem from 2070 to lets say 1950, would this lower the hashrate?

First, you do a wrong (proper less) way to mod your bios. Don't ever flashing your card with downloaded bios. It will be affecting your cards, unstable or even damage.

Better to do it yourself, newest PBE has a one-click mod function (good enough for starting to learn). And next, you can improve your modding way.
This is what I mean:


1. Under Global Settings I cannot find the GPU Workload > Computing option for any of the cards.


2. If I bump the memclock in AB to 1900mhz only GPU0 seems to pick up the new setting although the Sync option is checked for all of them.
   Uncheck Sync option, do it one by one.

3. When I saved the original bios for all 6, 3 of them are 256kb and 3 are 512kb... what gives???
   Did you save it by GPU-Z or AtiFlash?

Try this one here:

https://github.com/jaschaknack/PolarisBiosEditor

Make one click Timing patch and Flash your Card. For me works perfekt!

the blockchain beta driver doesn't have compute mode switch, its always in compute mode

Not all 570's make it to 28 or whatever, I have some with elpida memories that won't make it past 26.5

Try different memory straps, the crappy 570's I have for example work best with 1500MHz straps and memory clocked to 1850. So just.. flash it to 1750, clock as high as it goes without errors, check hashrate, flash it to 1625, clock as high as it goes, check hashrate etc down to 1325.

Try to find correct timings for Elpida and mod BIOS by yourself.

Does anyone have some good BIOS for this card?
Mine can't get past over 1870 mem clock and I am getting only 26.8 MHs while other are getting much more with it

Here is my Setup for my RX570 RedDevil stabel @ 29-30MH/s:

-tt 60 -cclock 1150 -cvddc 850 -mclock 2000 -mvddc 850

Try to uninstall the Driver with DDU and delete every Folder on the System. Then clean the regestry from it an make a clean install. If this doesn't help check your risers if they work fine.

And how do you flashed the Cards? Autoflash or a Setup from other users?

Hey Tony.
Did you ever get an answer to this?

I have the same with my rig when using Windows.  (on windows i got blue screen thread stuck in device)
Swapped to ethOS and now just one of my GPU's stops hashing when overclocked.  So If i run them all on 30 mh/s one of them stops after 15-20 minutes (sometimes it can run for several hours).

I have not tried to clock the problem gpu to normal bios  or changed the clocks for 25 mh/s yet, due to I am not home the next 14 days

Ok, so I keep reading about ppl getting this up to 28-30mh/s stable with no hdw errs.
Have been trying to get this past 25 for the past 2 weeks with no luck.
I think I must've flashed that bios 20 times so far and nothing helped.

Setup:
Win 10 pro (64bit)
Win10-64bit-Crimson-ReLive-Beta-Blockchain-Workloads-Ag23 driver patched.
6x Sapphire Nitro+ RX 570 OC 4gb - all Elpida (21 mh/s stock)
Claymore v10.0

Have tried all mods from Anorak, bought a couple from ebay... nothing get's this over 25.2-25.3mh/s
Right now I have them all 6 running @ 1100 core 1750 mem with 85.7W draw/card

The problem is if I try to bump the mem clock past 1900 it becomes unstable.
bsod, black screen... gazillion hdw errs

A few other things that I have noticed...
1. Under Global Settings I cannot find the GPU Workload > Computing option for any of the cards.

2. If I bump the memclock in AB to 1900mhz only GPU0 seems to pick up the new setting although the Sync option is checked for all of them.

3. When I saved the original bios for all 6, 3 of them are 256kb and 3 are 512kb... what gives???


Any help is greatly appreciated.
I'm not looking for freebies...
Willing to pay w/e the market value is for this service but would like to get it up to ~28+ mh/s stable with no hdw errs and fairly low power consumption.

Tony