Does anyone know why the system doesn't boot if I plus pcie riser into main x16 slot on motherboard?

BTW - I'm using P5Q PRO board: https://www.asus.com/Motherboards/P5Q_PRO/

Whenever I use the main x16 pcie slot (blue) the system won't boot.
Anyone knows how can I fix this ?

Windows 10 v1703
8 RX 580 Gaming-X 8GB (Hynix)
Asus Prime Z270 P
Claymore 9.8

In june with my rig i got 240 MH/s to 242 MH/s, i change nothing and now, 3 month later the MH/s drop 230 MH/s, i tried aug 23 blockchain driver, the result, i got 248 MH/s, but unfortunately i met issue with stabilty not good.
On this topic I read this "It should be higher. Try increasing the -ethi to 8. My eight card mixed RX 570/570 4GB/8GB rig is getting 28.5 to almost 30 MH/s dual mining UBQ."

What is this setting? -ethi to 8

You need to make one of your Furys a main card.
Main slot + plug monitor.

Use the latest v1.6. You definitely don't need to run PBE as an administrator. Atiwinflash does.

https://github.com/jaschaknack/PolarisBiosEditor

Seems wrong version of PBE, you need to find one which display the timings properly... did you try the one in the article I've sent earlier?
...and always 'Run As admin'....

When you start GPU-Z, it reports the memory brand. Also use the following article for BIOS flashing as it tells you the correct Polaris BIOS editor version to use in order to get rid of the craxy hex numbers you're seeing:
http://1stminingrig.com/sapphire-nitro-rx-470-8gb-oc-bios-flash-mod-tutorial-hynix-samsung/

You cannot use GPU-Z to save the BIOS as it only saves half of modern bioses. You must use ati flash to save the bios. You are copying the memory straps from either 1500 (hynix, micron and elpida) or 1750 (samsung) and pasting it to all memory straps higher than it, such as 1650, 1700, etc up to 2000 or higher. This makes the memory run with tighter memory settings so hashes more. But it can also make the card unstable and/or crash.

RX 560 - 13 Eth 34 LBR  
RX 570 - 28.6 Eth 74 LBR
RX 580 - 29.4 Eth 79 LBR

I decided to answer my own question

to increase hashrate, you need to mod your bios and edit your memory timings.  Also, underclock and undervolt to save electricity and overclock the memory.  Its not plug and play, but there many guides out there, youtube videos and bitcointalk posts.  You could always check my website there is a section on bios flashing.  at your own risk.  no one said it was easy but for a little effort you will get 30% more hashrate for less power usage.

Im brand new here, trying to mine eth with a G73 laptop running windows 7 w/ a GTX 460M, currently getting this error:


-----------------------------------------------------------------------------------------------------------------------
12:29:22:153   129c   ETH: job changed
12:29:22:153   129c   new buf size: 0
12:29:22:278   8bc   Setting DAG epoch #141...
12:29:23:994   1974   NVML: cannot get fan speed, error 3
12:29:25:088   8bc   Setting DAG epoch #141 for GPU0
12:29:25:088   8bc   Create GPU buffer for GPU0
12:29:25:104   8bc   CUDA error - cannot allocate big buffer for DAG. Check readme.txt for possible solutions.

12:29:27:275   1974   NVML: cannot get fan speed, error 3
12:29:28:117   8bc   Set global fail flag, failed GPU0
12:29:28:117   8bc   GPU 0 failed
12:29:28:149   1864   Setting DAG epoch #141 for GPU0
12:29:28:164   1864   GPU 0, CUDA error 11 - cannot write buffer for DAG
------------------------------------------------------------------------------------------------------------------------


Any help would be greatly appreciated!, Thank you


sidenote: just checked GPU RAM &:

Total available memory: 4095 MB
Dedicated Video Memory: 1536 MB
System Video Memory : 0 MB
Sharsed System Memory: 2559 MB

Need some help, I have 12 cards in a system. I can run the 7 Nvidia with no issues. And I can run 3 of the 5 AMD cards with no issues, And I can run each of the 5 AMD cards solo, but  if the other 2 are allowed to run with other cards it crashes my GUI. And Apparently windows but the remote client stay alive during this crash because I can DC and reconnect to it but its just a black screen, and it appears to still has for 3-5mins after this event crashes the gui, but I see nothing in windows error logs.


Are there and logs that can upload to trouble shoot the issue?

Did btcjam.com scam anyone? I been using it for many years and it never scam me once. If you are planning on loaning your bitcoin you need to thoroughly examine your the lenders background.