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After installing 2nd GPU Computer won't start

Last response: in Graphics & Displays
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February 15, 2013 2:06:59 PM

My system is

SeaSonic 750W Power Supply X750 Gold
Intel Core i5-3570K Quad-Core Processor 3.4 GHz
Asus P8Z77-V LK Intel Z77
Corsair CPU Cooler CWCH60
Corsair Vengeance 8 GB ( 2 x 4 GB ) DDR3 1600 MHz
ASUS GTX 660 Ti Series Graphics Card Overclocked Edition
SanDisk Extreme SSD 120 GB SATA 6.0 Gb-s2.5
a b U Graphics card
February 15, 2013 2:17:01 PM

Does the pc start with just the new card in?
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February 15, 2013 2:20:30 PM

Thankful1 said:
My system is

SeaSonic 750W Power Supply X750 Gold
Intel Core i5-3570K Quad-Core Processor 3.4 GHz
Asus P8Z77-V LK Intel Z77
Corsair CPU Cooler CWCH60
Corsair Vengeance 8 GB ( 2 x 4 GB ) DDR3 1600 MHz
ASUS GTX 660 Ti Series Graphics Card Overclocked Edition
SanDisk Extreme SSD 120 GB SATA 6.0 Gb-s2.5



I hit the wrong button before I stated my problem. All has worked well with my build. I decided to go SLI so I bought an identical card and when I physically installed it, my computer won't start. Nothing. It is and was well seated. When I remove it the computer starts and operates properly. I am about to swap out the original gpu for this one just to confirm it works. I have just completed that swap and the new card woks fine in the number 1 PCIEX16 slot. I appreciate any advice with this issue. I may have to send it back and time is a factor. Many thanks in advance to all who try to help me out.
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Related resources
February 15, 2013 2:21:08 PM

Thankful1 said:
My system is

SeaSonic 750W Power Supply X750 Gold
Intel Core i5-3570K Quad-Core Processor 3.4 GHz
Asus P8Z77-V LK Intel Z77
Corsair CPU Cooler CWCH60
Corsair Vengeance 8 GB ( 2 x 4 GB ) DDR3 1600 MHz
ASUS GTX 660 Ti Series Graphics Card Overclocked Edition
SanDisk Extreme SSD 120 GB SATA 6.0 Gb-s2.5

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a b U Graphics card
February 15, 2013 2:25:55 PM

Did you try putting the first gpu in the other PCI-e slot?
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February 15, 2013 6:54:58 PM

larrym said:
Did you try putting the first gpu in the other PCI-e slot?



Yes, I removed the original and installed the new card and it started fine.
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February 15, 2013 7:39:42 PM

Does the computer start with just 1 card in the second slot?
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a c 133 U Graphics card
February 15, 2013 7:48:06 PM

Something seems wrong with your motherboard its not reading 2 cards when it should. Have you thought about updating your bios and seeing if perhaps it fixes the issue? Just a thought.
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February 15, 2013 8:52:21 PM

bigshootr8 said:
Something seems wrong with your motherboard its not reading 2 cards when it should. Have you thought about updating your bios and seeing if perhaps it fixes the issue? Just a thought.


When I was installing the mobo drivers I had trouble with the chipset drivers. I had forgotten that. I will persue the mobo angle. I am pretty sure after cogitating on it this is where the problem lies. Thanks I will update this.
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February 15, 2013 8:53:33 PM

rshillshooter81 said:
bad motherboard.


I believe the mobo is the issue also. I will focus on that. Thanks!
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February 15, 2013 11:05:18 PM

mmaatt747 said:
Does the computer start with just 1 card in the second slot?


I have not tried this suggestion yet but I will tonight and reply with the results. Thank you.
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February 16, 2013 12:18:21 AM

larrym said:
Did you try putting the first gpu in the other PCI-e slot?



It turned out to be a variable that I had not mentioned. I bought some pci-e 6 pin extensions. They turned out to be the issue. I still don't know why but when I just used the Seasonic cables without the extensions, everything worked. I am still esending the card back because of stutter. I am new to all of this but between tearing(half of the time I use vsync), and now the stuttering I am just going to stick with one GPU card. It's a decent card. Thansk for the input.
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a c 133 U Graphics card
February 16, 2013 12:30:35 AM

Well with having a Nvidia card you should be using Adaptive where you can.
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February 17, 2013 12:35:38 PM

bigshootr8 said:
Well with having a Nvidia card you should be using Adaptive where you can.




Thanks for the heads-up on the adaptive vsync! After I read your remark I researched what it is and if only finding the setting in nvidia's control panel was as easy to find as info pertaining to it on the net. I finally found a comment in a forum that mentioned it was a Global setting and the place where it is set is very obscure and does not even appear at first look to be adjustable. I got a dropdown with the adaptive option. Again thanks bigtime for the info! This is why Tom's Hardware is an invaluable resource.
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a c 133 U Graphics card
February 18, 2013 1:22:10 AM

course! I personally go by application and do it because you don't need to really vsync your system during normal use. But most certainly for gaming it's a little less punishing on your system.
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!