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BLANK display after adding 4th GPU URGENT HELP!

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Hi,
Im using asus z170 gaming pro mobo,
Thermaltake toughpower 1000w gold psu
3 gtx 1070 are working fine,
But after I add gtx 1060(4th gpu) whether i install it via riser or directly to mobo,
Pc wont boot window nor asus logo just blank display, this symbol appears " _ " for few seconds again and gone..
Nothing happening,
Please help.
Sorry for mistake (pc not working typed via phone)
 
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may be too much for PSU?

try swapping riser cable, or swapping card to be added 4th, or slot to be used 4th, to rule out it being GPU , or riser/slot specific.
 

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It was running fine, from months. Dont know what happened, i tried to use multi psu but no help..
may be too much for PSU?

try swapping riser cable, or swapping card to be added 4th, or slot to be used 4th, to rule out it being GPU , or riser/slot specific.
Tried, all GPUs are fine.. but only 3 working.. : /
 
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but only 3 working.. : /

but it doesnt matter which GPU You add in the 4th position, it happens with ANY of them when they are added 4th ,correct? thats what i was trying to rule out.
 
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but it doesnt matter which GPU You add in the 4th position, it happens with ANY of them when they are added 4th ,correct? thats what i was trying to rule out.
Yes what ever gpu i add, forth isnt working. You can place i put, it only boots when theres three GPUs are installed..
 
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i think there maybe a bios setting.. in mine it was for four or more gpus..

your psu is good for maybe six 1070 cards so it isnt that.. look in the bios for the setting i mentioned..

trog
 

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Yes what ever gpu i add, forth isnt working. You can place i put, it only boots when theres three GPUs are installed..

Is the first 3 cards plugged into the PCI-E x16 slots, and the 4th being run off one of the PCI-E x1 slots? Because I seem to remember some nVidia cards having issues POSTing when plugged into an x1 slot. They needed x4 or more.
 

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I have that board you need to verify all of the different settings for pcie are all set for Gen 1 there are three or four, verify 4g decoding is enabled as well.

I currently have 9 gpus on that board using a 4:1 pcie splitter.
 
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Thanks to all for reply.

i think there maybe a bios setting.. in mine it was for four or more gpus..

your psu is good for maybe six 1070 cards so it isnt that.. look in the bios for the setting i mentioned..
Which settings bro. Please bit more explanation im noob xd

trog
Running out of PCI lanes ?

Is the first 3 cards plugged into the PCI-E x16 slots, and the 4th being run off one of the PCI-E x1 slots? Because I seem to remember some nVidia cards having issues POSTing when plugged into an x1 slot. They needed x4 or more.
2 gpus using x16 pcie wire(without molex)
2 riser cable x1 with molex.
I tried to put 4th one directly to mobo,
Still same issue, may mobo needs one x16 and other with power molex?

I have that board you need to verify all of the different settings for pcie are all set for Gen 1 there are three or four, verify 4g decoding is enabled as well.

I currently have 9 gpus on that board using a 4:1 pcie splitter.
Yea 4g settings was necessary i forget earlier, but i enabled at right time..
I was able to detect 4th gpu,
After appearing desktop I saw vga device with exclamation sign, when windows tried to install drivers automatically, display appeard blank just saw cursor only,
Then i rebooted to safe mode and uninstalled drivers, then rebooted installed drivers again, it worked but when i started mining, all gpu worked for few seconds, pc got sudden blank with no signal msg.
Then i hard rebooted noticed 4th gpu is undetectable again..
No device on device manager..
Running only 3 gpus.
I haven't tried pcie gen 1 settings,
Can you explain more?
Do i need to just change settings to gen 1 that's all?
 
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Well quad SLI is not supported officially so remove 2 cards and sell them to someone who needs it and you will be happy with 2 cards, ofc if you are mining then i can't help you :p
 
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cdawall

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Do i need to just change settings to gen 1 that's all?

More than likely yes. Gen 3 causes all kinds of weird issues
 
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