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Topic: Got any tips for getting the last slot working? (Read 433 times)

full member
Activity: 196
Merit: 100
October 24, 2016, 10:05:02 AM
#4
Plug the monitor into the display getting the low hashrate.
member
Activity: 89
Merit: 10
I am trying to get only 3 (J1900) or 4 (Z97) GPU's working and I always l have the display connected to the first RX that I install.  This has something to do with the MB.
legendary
Activity: 3808
Merit: 1723
Plug a monitor into one of your RX cards.

If you want to use 6 GPUs, you need to upgrade to WIndows 10.
member
Activity: 89
Merit: 10

I have two main boards from different mfr's and each has difficulty filling the last PCIe slot.

The last RX470 only works at 300Mhz GPU core and hashes about 4MH/s, and won't take settings from Wattman/Wattool.

In both cases, I tried a different card, riser, cable, and the same items work properly in another slot or MB.

I tried switching BIOS to PCI Gen2, re-flashing cards, re-installing from bare metal.

Any suggestions?

Background:
ASRock Z97 Anniversary
Celeron 1840
Windows 7 64bit
Sapphire RX470Nitro 4G
USB 3.0 Rev6 risers

ASRock Q1900M
Celeron J1900
Windows 7 64bit
Sapphire RX470Nitro 4G
USB 3.0 Rev6 risers

Thanks for looking this far. Smiley
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