H110 Pro BTC+ low hashrate on PCIe 1x

[stuben]

Hi to all, I just bought this mobo from ASRock, installed Windows 10, and trying to setup some GPUs, they're all Sapphire RX 570 ITX with Elpida/Hynix Memory.
I've found a bios mod to obtain 30H/s on ETH, over the stock 22.5H/s, and tested on 4 cards one by one on PCI 16x.
The problem started when I connected some GPUs with riser cables on 1x slots. The same cards gave me 22H/s instead of 30, and even with stock bios it was reduced to 19 over the initial 22.5.
Given that it's not a power problem, since the PSU is a 850gold, I thought it was a riser problem and tried all things, switching from sata/6 pin adapter to 6pin direct connection, with no luck.
Finally I've tried with a single GPU on a riser cable, if I connect it to the 1x slot, it gives me 22. If I connect the same, always with riser cable, to 16x slot, it works well at 30H.
So I assume it's not a riser problem, but a slot one, am I right? Or what else could be?
Is there any solution to this?

Thanks in advance

[rascabily]

Hi to all, I just bought this mobo from ASRock, installed Windows 10, and trying to setup some GPUs, they're all Sapphire RX 570 ITX with Elpida/Hynix Memory.
I've found a bios mod to obtain 30H/s on ETH, over the stock 22.5H/s, and tested on 4 cards one by one on PCI 16x.
The problem started when I connected some GPUs with riser cables on 1x slots. The same cards gave me 22H/s instead of 30, and even with stock bios it was reduced to 19 over the initial 22.5.
Given that it's not a power problem, since the PSU is a 850gold, I thought it was a riser problem and tried all things, switching from sata/6 pin adapter to 6pin direct connection, with no luck.
Finally I've tried with a single GPU on a riser cable, if I connect it to the 1x slot, it gives me 22. If I connect the same, always with riser cable, to 16x slot, it works well at 30H.
So I assume it's not a riser problem, but a slot one, am I right? Or what else could be?
Is there any solution to this?

Thanks in advance

13 Rx 570 in win 10?

[Rasanders22]

Hi to all, I just bought this mobo from ASRock, installed Windows 10, and trying to setup some GPUs, they're all Sapphire RX 570 ITX with Elpida/Hynix Memory.
I've found a bios mod to obtain 30H/s on ETH, over the stock 22.5H/s, and tested on 4 cards one by one on PCI 16x.
The problem started when I connected some GPUs with riser cables on 1x slots. The same cards gave me 22H/s instead of 30, and even with stock bios it was reduced to 19 over the initial 22.5.
Given that it's not a power problem, since the PSU is a 850gold, I thought it was a riser problem and tried all things, switching from sata/6 pin adapter to 6pin direct connection, with no luck.
Finally I've tried with a single GPU on a riser cable, if I connect it to the 1x slot, it gives me 22. If I connect the same, always with riser cable, to 16x slot, it works well at 30H.
So I assume it's not a riser problem, but a slot one, am I right? Or what else could be?
Is there any solution to this?

Thanks in advance

Did you try and change the PCIe generation?

[stuben]

Hi to all, I just bought this mobo from ASRock, installed Windows 10, and trying to setup some GPUs, they're all Sapphire RX 570 ITX with Elpida/Hynix Memory.
I've found a bios mod to obtain 30H/s on ETH, over the stock 22.5H/s, and tested on 4 cards one by one on PCI 16x.
The problem started when I connected some GPUs with riser cables on 1x slots. The same cards gave me 22H/s instead of 30, and even with stock bios it was reduced to 19 over the initial 22.5.
Given that it's not a power problem, since the PSU is a 850gold, I thought it was a riser problem and tried all things, switching from sata/6 pin adapter to 6pin direct connection, with no luck.
Finally I've tried with a single GPU on a riser cable, if I connect it to the 1x slot, it gives me 22. If I connect the same, always with riser cable, to 16x slot, it works well at 30H.
So I assume it's not a riser problem, but a slot one, am I right? Or what else could be?
Is there any solution to this?

Thanks in advance

Did you try and change the PCIe generation?

Yes, I've tried both 1st and 2nd gen, nothing changed.

[stuben]

Ok, after 2 days of pain, I've found the solution:
I had installed the first GPU and set up the driver in "compute mode", thinking it was a general setting.
Now, with all the GPUs installed, I can see that there's a tab for every GPU, so I had to set compute mode for each one.

Finally it's working great!
 

[boosted6spd]

I have the ASRock H110 Pro BTC+ motherboard running 13 Nvidia GTX 1070's and they are experiencing a similar problem where they do not want to hash higher than 27 MH/s. Would you mind sharing the BIOS mod that you are using to achieve higher hash rates? I previously ran 8 of these same 1070's on an ASUS B250 Mining Expert motherboard and they had no problems performing at 32 MH/s. I realize that each motherboard is different and requires understanding. Any information you can share will be greatly appreciated.

[nathan_tek]

I have the ASRock H110 Pro BTC+ motherboard running 13 Nvidia GTX 1070's and they are experiencing a similar problem where they do not want to hash higher than 27 MH/s. Would you mind sharing the BIOS mod that you are using to achieve higher hash rates? I previously ran 8 of these same 1070's on an ASUS B250 Mining Expert motherboard and they had no problems performing at 32 MH/s. I realize that each motherboard is different and requires understanding. Any information you can share will be greatly appreciated.

His Bios-mod is for AMD cards, not for your GTX 1070's and not for your motherboard...Have you overclocked/set powerlimit of your cards properly? If you are using Windows10, have you installed the latest updates? Have you increased your page file size (virtual memory)?