GPU problems

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Hajar

PCHF Member
Aug 22, 2017
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My pc wont reconize the bottom gpu. The top gpu is in PCIE 16x slot and bottom one is in PCIE 8x. The reason ive put them this far apart is to reduce heat build up. Dose any one know why the botton gpu isnt being reconised by my pc? My specs
Windows 10 Pro 64bit
Intel core i7 6800K OC to 4Ghz
Asus GTX 1080 Ti ROG STRIX OC SLI
4x 4GB Corsair Vengence 3000MHz Ram
2x Corsair Vengeance 8GB 3000MHz white LED
Gigabyte x99 Ultra Gaming CF
Corsair Hx1000i PSU. Thank you
 

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Welcome to PCHF Hajar,

Download then run Speccy (free) and post the resultant url for us, details here, this will provide us with information about your computer hardware + any software that you have installed that may explain the present issue/s.
 

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Hajar said:
My pc wont reconize the bottom gpu. The top gpu is in PCIE 16x slot and bottom one is in PCIE 8x. The reason ive put them this far apart is to reduce heat build up.
Click to expand...
For graphics cards be them Nvidia or AMD they need to have a common connection, in this instance an SLI connector, see here
 
You do not mention in your OP the brand and model name or number details of the second add on video card and Speccy is not detecting one, have you by any chance removed the known good ASUS GTX 1080 Ti and tried the other GPU that you have in place of the ASUS GTX 1080 Ti .


What Speccy is telling us about your graphics solution;

Graphics
Acer X34A (3440x1440@100Hz)

3071MB NVIDIA GeForce GTX 1080 Ti (ASUStek Computer Inc): 43 °C
 
phillpower2 said:
You do not mention in your OP the brand and model name or number details of the second add on video card and Speccy is not detecting one, have you by any chance removed the known good ASUS GTX 1080 Ti and tried the other GPU that you have in place of the ASUS GTX 1080 Ti . What Speccy is telling us about your graphics solution; Graphics Acer X34A (3440x1440@100Hz) 3071MB NVIDIA GeForce GTX 1080 Ti (ASUStek Computer Inc): 43 °C
Click to expand...
phillpower2 said:
You do not mention in your OP the brand and model name or number details of the second add on video card and Speccy is not detecting one, have you by any chance removed the known good ASUS GTX 1080 Ti and tried the other GPU that you have in place of the ASUS GTX 1080 Ti . What Speccy is telling us about your graphics solution; Graphics Acer X34A (3440x1440@100Hz) 3071MB NVIDIA GeForce GTX 1080 Ti (ASUStek Computer Inc): 43 °C
Click to expand...
 
Ive changed the GPU over and the bottom card will not work. i know both cards work when i put them in a pcie 16x slot. when one card is in pcie x8 slot it wont work
 
Hajar said:
i dont understand what that means
Click to expand...
Can I ask do you have or have you read the user manual for your motherboard!

Expansion Slots Š 2 x PCI Express x16 slots, running at x16 (PCIEX16_1, PCIEX16_2) * For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIEX16_1 slot; if you are installing two PCI Express graphics cards, it is recommended that you install them in the PCIEX16_1 and PCIEX16_2 slots. * When an i7-5820K or i7-6800K CPU is installed, the PCIEX16_2 slot operates at up to x8 mode.

Š 2 x PCI Express x16 slots, running at x8 (PCIEX8_1, PCIEX8_2) * The PCIEX8_1 slot shares bandwidth with the PCIEX16_1 slot and the PCIEX8_2 slot shares bandwidth with the PCIEX16_2 slot. When the PCIEX8_1/PCIEX8_2 slot is populated, the PCIEX16_1/PCIEX16_2 slot operates at up to x8 mode. * When an i7-5820K or i7-6800K CPU is installed, the PCIEX8_2 slot becomes unavailable.

See pages 18 and 19 of your MBs user manual if you have it or alternatively download the manual from here
 

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Not heard back from you Hajar, do you still require assistance or is the issue now resolved, an update would be appreciated.
 
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