Good day...

Turned out the reason for the problem was a damaged USB cable...
Now miner is happily mining with 4 cards...

i have plugged in the riser...i also have switched the working riser and GPU lets say from PCIe2 to 1 etc... the riser and that haven't worked now worked and the one that did work now disappeared... so i think must be something else than the riser or GPU...

Good day...

im building a Eth mining rig with a Asrock z97 anniversary motherboard.
I have 4 PCIe 1x riser cards installed into the 4 PCIe slots.

However nothing is getting recognized in pcie1 slot. the remaining 3 slots work fine and all 3 GPUs are getting recognized. looking into the bios the only setting i can find is adjusting the PCIe speed, non of the settings is making any difference. also the Bios has a tool were you can see a map of your motherboard and everything else is getting presented just fine, while PCIe1 slot remains shown as empty... any ideas? switching risers, cables etc... did not make any change

i have 1x 4gb Ram module and a dual core Celeron CPU installed.

Thank you for your help!
...Max

Good day everybody...

i just started with mining and build myself a prototype miner with stuff i had laying around mostly unused....
My configuration is:

Hardware:
3x XFX Radeon RX 480 RX480M8BFA6 Reference design - Samsung Memory
1x Xeon E5-2698V4 ES (20 core, 40 threads, 2,3ghz, 50mb L3)
1x Supermicro X10SRA-F motherboard
2x 16Gb ECC DDR4
1x 1000W EVGA G2

GPU Installation:
All 3 GPU´s are installed internally to the motherboards PCI Sockets 2, 4 and 6.
6 is running in 16x, 4 & 2 are running in 8x

Software:
Windows 10
Crimson 16.9.2
Claymore dual GPU miner v8.0 (though only using single miner mode)
Docker with Monero CPU miner from servethehome.com

Past and current mining performance:
- my 3 cards made out of the boy 23-24Mh/s with crimson 17.3.3
- changed drivers to 16.9.2 witch improved to about 24-25Mh/s
- Downloaded Bios of cards, made a copy entered PolarisBiosEditor and copied the timing string from 1750 to 2000, wich improved performance to 25-26Mh/s

26Mh/s is what i currently max. achieve per card.

Obviously i have seen an dread the threads about the 31Mh/s modded bios and i have tried to flash it on my cards. unfortunately i have returned with a flashing error. I have loaded the 30Mh/s version into the polaris editor and have seen that it says 4gb Version. i Further then have copied all settings for speed, voltages and timings to my original Bios, once successfully flashed and rebooted the installed drivers do not regignize the card and boots without loading the drivers. I have flashed the card back and only modified now the timing string from 1750 to 2000....

i hope somebody can take me by the hand and guide me to make my cards finally run 30Mh/s in a power efficient manner...

Thank you for your support and time,
Have a great day!


Post i am referring to:
https://bitcointalk.org/index.php?topic=1584617.0

Current mining performance:
https://ethermine.org/miners/e83b5462e8576bd528e484ece5705e16c5a65a37

Screenshot of miner and card infos

Good day....

new to mining and started to build myself a mining prototype with a bunch of unused stuff i had around + bought 3 RX480-8Gb XFX Reference design cards
XFX Radeon RX 480 DirectX 12 RX480M8BFA6 8GB 256-Bit GDDR5 PCI Express 3.0 CrossFireX Support Video Card

i started mining ETH, and hashed around 24mhs per card as it may should be expected.
I tried to flash with the 30mhs version on page 1, but got some kind of error message that i don't recall right now...
i then downloaded my cards bios and modified it by copying  the second last memory string to the last one (i guess the 1750 to the 1900, if i recall right)

This worked and improved the hash rate to about 25-26mhs.

However, im really interested in flashing to the most powerful and efficient bios possible.
Can somebody take me by the hand and guide me to how and what bios I can flash?

Thank you & have a nice day!