Lower hashrate on one card RX580 - ETH mining with Claymore

[Jon Mnemonic]

Hello all,

This post is my last hope and I think you will be able to help me.

The problem is that one card hashrate is much lower then the other and even below its potential.
I have a 2 cards only Saphire RX580 pulse 8gb oc. I moded the bios on those cards.
I am using integrated grahpics for monitor. Set the Gen2 PCIe in bios and using Windows 10 and Claymore miner.
When I start it everything is ok. the both cards have some reasonable hashrate.
https://drive.google.com/open?id=10GNg9csmXe-Nu-dH3KxSgZ-WYU3-5Ids
After that, one card is droping its hashrate constantiny until it reaches some point. In picure below this is a 16Mh/s
https://drive.google.com/open?id=19yAZXQOLwURcc0FAa8FR-QDV-VUr_QAe

I dont know what is the issue here.
I tried to:

• restart the PC
• restart the miner like 1000 times 
• changing BIOS setting (PCI gen3, gen2, gen1)
• changing the cards to different slots on MB (with or without riser)
• play with the Afterburner and Claymore settings (-cclock 1130 -mclock 2250 -cvddc 870 -mvddc 970 - asm) I think I have the readme.txt claymore in my head now 
• trying different version of Claymore

using the Claymore Dual 10.5 but mining only ETH.
start.bat looking like that:

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eth-eu1.nanopool.org:9999 -ewal [WALLET.EMAIL] -epsw x -mode 1 -allpools 1 -cclock 1130 -mclock 2250 -cvddc 870 -mvddc 970

I have a Gigabyte MB (GA-Z97X-Gaming 3), PSU 850W.

I must say that sometimes when I restart the PC and start the mining again I have a very good results:
(part of log 2 days ago)
18:14:18:485   28f8   new buf size: 0
18:14:18:486   28f8   ETH: 01/28/18-18:14:18 - New job from eth-eu2.nanopool.org:9999
18:14:18:486   28f8   target: 0x000000006df37f67 (diff: 10000MH), epoch 166(2.30GB)
18:14:18:488   28f8   ETH - Total Speed: 57.790 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:01
18:14:18:489   28f8   ETH: GPU0 27.994 Mh/s, GPU1 29.797 Mh/s

And that hashrate was for about 6 days, stable on lvl 55/57Mh/s. After that, I had a small internet problems and when mining starts again it is like on picture - 43Mh/s.
Can someone have a clue what could be the reason and how to make this mining repeatable?
What should I change to get good Hs (reasonable for the RX580) stability?

Thanks in advance!
Jon

[1715159009]

1715159009

[1715159009]

1715159009

[MATHReX]

1. Set the PCIe lane speeds to GEN1 for both x16 and x1 slots.
2. Increase the virtual memory to 16 GB.
3. Use latest Claymore version.
4. Uninstall your drivers using DDU in safe mode and intsall blockchain drivers and run ATI patcher.
5. TEST -- 1 (With no overclock and undervolt, do a test for hashrates for half an hour).
6. TEST -- 2 (Now, start to increase memory overclock and core undervolt by small increments until you hit the sweet spot for both).

After you've reached this point, you can easily Dual mine and increase your earning by upto 25%.

[Jon Mnemonic]

I will test it right away  .

I have already Blockchain drivers installed
https://drive.google.com/open?id=1dFvvfMTHet5WJ1lpObtsnl3IY6uzmniG

[Amstellodamois]

Uninstall your drivers using DDU in safe mode and intsall blockchain drivers and run ATI patcher.

I like the latest Adrenalin, I'm running over 31 MH/s with my Saphire Pulse OC.



OP> Are they in compute mode?
Fresh windows install? Are you doing something else with your machine (my hashrate was dropping when I was plotting an HDD)?

[Jon Mnemonic]

1. Set the PCIe lane speeds to GEN1 for both x16 and x1 slots.
2. Increase the virtual memory to 16 GB.
3. Use latest Claymore version.
4. Uninstall your drivers using DDU in safe mode and intsall blockchain drivers and run ATI patcher.
5. TEST -- 1 (With no overclock and undervolt, do a test for hashrates for half an hour).
6. TEST -- 2 (Now, start to increase memory overclock and core undervolt by small increments until you hit the sweet spot for both).

After you've reached this point, you can easily Dual mine and increase your earning by upto 25%.

ad 1. DONE - I have some suspicion that when I changing something in BIOS or just entering BIOS the cards working good after that. With just a restart it sucks with 40Mhs.
ad 2. I have that already
ad 4. I have a win10 migrated from win7 and I don't know why, but I cant enter safe mode. Right now I have only blockchain drivers without AMD software. I play with the drivers some time in the past and uninstall it few times until I figured out how to instal only blockchain drivers without AMD software. (the problem was that GPU-Z shows blockchain drivers only for 1 card, without AMD software and only manually instaled blockchain drivers GPU-Z shows it for both cards) ATI patcher also done.
ad 5. no OC or UV after changing the lane speed to gen1 (entering BIOS ) test started at 12.43 and from beginning it is like that.
https://drive.google.com/open?id=1wmRohoQojlNkaYqqMQ8ktRwizrGou48l

So let say it is ok for now...

[Jon Mnemonic]

After 7 hours, it runs stable. Hashrate is similar in both RX580.
https://drive.google.com/open?id=1jy8KlCXrz7WiaxCxoXt1EbQt_BVJINvT

Uninstall your drivers using DDU in safe mode and intsall blockchain drivers and run ATI patcher.

I like the latest Adrenalin, I'm running over 31 MH/s with my Saphire Pulse OC.



OP> Are they in compute mode?
Fresh windows install? Are you doing something else with your machine (my hashrate was dropping when I was plotting an HDD)?

I diid small test, I uninstall the blockchain drivers using DDU and install the latest Adrenaline drivers (18.2.1). After that, one card was 30Mh/s and second was 16Mh/s.
After that I ninstall drivers onse again and bo back to the blockchain ones.
I do not have a fresh windows install, I have a upgrade from win7.

What else can I do to increase the hashrate to 30Mhs?

[Amstellodamois]

In AMD settings (with your fresh adrenalin drivers), you have to set the cards to compute mode.

[coinmasterr]

Do these to solve your problem:
1- Disable windows defender
2- Disable windows update
3- Download and install AMD Radeon Blockchain Edition: http://how-to-mine.com/softwares/Drivers/AMD-Cards/AMD-Radeon_RX-Series/Radeon_Driver_Blockchain_Edition.zip

I hope you can increase your hashrate