Low Hahrate of GPU in 2nd PCI e16 slot - Please help

[Dukebit]

HI Guys

please assist if you don't mind, I'm running two gpu's in my machine, but for some reason the hashrate of the gpu in the second PCIe16 slot is very low?

if tried switching the gpu's but the outcome is the same the gpu in the second PCIe slot performs very poorly.

The well performing gpu run in PCIe x 16 3.0@16 2.0 while the under performer is running in PCIe x 16 3.0@ 4( instead of 16) 1.1.

what must I do to get the hashrate up ( the underperforming gpu currently doing a quarter of what is actually can).

hope some will be able to help.

thank you

[1715127270]

1715127270

[xxcsu]

What GPU ?
What Motherboard ?
What operation system ?

Try to connect your monitor or a dummy plug to that "under performing" gpu
if you have a onboard gpu , make sure its turned off in bios

[Dukebit]

Hi

i'm using 2 gpu's * R9 280x oc 3gb & RX 570 4gb *
The mobo is a Gigabyte P55a-UD3r (Quite an old board)
OS - Windows 10 pro

No on board graphics, did check and tried the dummy plug, still not working

thanks


Has someone perhaps experienced the same problem before ?

[EthereumPY]

That's depends on how low you define, since this is only a 2 GPU build i don't think there are some socket related conflict giving this.
FYI My rig 280x  give me ~14mh each
If your's lower than this, u may want to update your drivers or check if there are any problem with your OS

[MATHReX]

Hi

i'm using 2 gpu's * R9 280x oc 3gb & RX 570 4gb *
The mobo is a Gigabyte P55a-UD3r (Quite an old board)
OS - Windows 10 pro

No on board graphics, did check and tried the dummy plug, still not working

thanks


Has someone perhaps experienced the same problem before ?

Windows 10 Pro completely updated?
Are you using latest relive drivers?
Did you set the virtual memory to 16000 MBs?
Do you happen to apply all the power tweaks in your system?

[thinkfar]

HI Guys

please assist if you don't mind, I'm running two gpu's in my machine, but for some reason the hashrate of the gpu in the second PCIe16 slot is very low?

if tried switching the gpu's but the outcome is the same the gpu in the second PCIe slot performs very poorly.

The well performing gpu run in PCIe x 16 3.0@16 2.0 while the under performer is running in PCIe x 16 3.0@ 4( instead of 16) 1.1.

what must I do to get the hashrate up ( the underperforming gpu currently doing a quarter of what is actually can).

hope some will be able to help.

thank you

Enable Pcie Gen 2 in your bios.

[Dukebit]

Hi Gents

hope you all are well, I managed to get the 2nd Gpu up and running as it's supposed to. I switched the GPu's again and used a dummy screen.

Once again, thank you all for the help.

Duke