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AnsweredUnable to activate SLI | EVGA GTX 770 SC w/ ACX

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Mark467
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Wednesday, July 22, 2015 6:12 PM (permalink)
Hello. Two months ago I posted this on another forum but we were unable to figure it out.
I will repost from there.
 
"So I just got my second EVGA GTX 770 (Superclocked ACX cooling), checked my power supply (850 watts), and updated all my drivers but Nvidia is not showing the SLI configuration tab in Nvidia Control Panel. However in the Nvidia Control Panel, in Device Manager, and in Geforce Experience they all say 2 GTX 770s. I have my SLI Bridge of course and have checked my BIOS for a way to activate SLI but have found none.
I'm not sure what to do at this point."
 
Added rig to signature.
 
Here is the thread on Tek Syndicate's forums.
 
(It was removed. Can we not post links?)
 
"Both GPUs are in the PCI x16 slots.
I've done a clean wipe of the drivers.
The SLI Bridge is in the left most slot (pictured in reply) and fresh out of the bag.
I've wiped and reinstalled drivers using Guru3D's DDU.
The second card is used that I bought from a Redditor.
 
I just put the new GPU in the lower PCI slot alone my screen didn't power up but it's fans did. The older GPU when in the lower slot did work though. So I switched them from their original positions so the newer one was in the top and the older in the bottom. Then somehow with the DVI cable in the newer GPU the screen went on. So I logged on and now I'm using the newer GPU that I just bought but my initial issue is still present. The SLI tab is not showing up in the Nvidia Control Panel."
post edited by Mark467 - Wednesday, July 22, 2015 6:37 PM

i5 4670K @ 4.2GHz 
2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
Asus Maximus Hero VI
Corsair Vengeance Pro 16GB (2 x 8GB) DDR3 1866
Samsung 840 EVO 120GB SSD (OS) 
Samsung 84​0 EVO mSA​TA 1TB (game drive)
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    bdary
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Wednesday, July 22, 2015 6:16 PM (permalink)
    Hi and Welcome to the Forums...
     
    What is the make and model number of your motherboard?


     
     
     
     
     
     
     
     
     
     
     
    #2
    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Wednesday, July 22, 2015 6:42 PM (permalink)
    bdary
    Hi and Welcome to the Forums...
     
    What is the make and model number of your motherboard?




    Looks like the pcpartpicker links were removed.
    Asus Maximus Hero VI
    Also added to signature. 

    i5 4670K @ 4.2GHz 
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    #3
    bdary
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Wednesday, July 22, 2015 6:58 PM (permalink)
    You have your GPU's in both of the red PCIe slots, correct?
     
    Did you disable the integrated GPU in the BIOS?  It might be called iGPU or on-board graphics, etc, in the BIOS, not sure on what ASUS's terminology might be.  Some boards don't need that disabled, some do.  If you haven't tried disabling it yet, give that a try.
     
    Have you tried moving the SLI bridge to the other set of fingers on the GPU's?  Also try a different SLI bridge if available.


     
     
     
     
     
     
     
     
     
     
     
    #4
    NemesisChild
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Wednesday, July 22, 2015 9:52 PM (permalink)
    You might need to enable Gen 3 or PCI-E 3.0 in your Hero VI bios.
     
    Some other thoughts come to mind:
    1. Is the second card using a modded or different bios?
    2. Just checking, both cards have the same amount of memory, 3GB?
    3. Did you try swapping out SLI bridges?
    4. Are both cards showing up in your mobo bios?
    5. Move the SLI bridge to the other (inner) post on the right.

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    Sajin
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Wednesday, July 22, 2015 10:33 PM (permalink) ☄ Helpfulby Mark467 Thursday, July 23, 2015 2:15 AM
    Verify both of your cards are running at least x8 speeds. Download GPU-Z and run the render test on each GPU, the render test can be brought up be selecting the question mark circled in green. The red indicates if your card is running at x16, x8 or x4. The orange allows you to switch between the two GPU's.
     
    Latest version of GPU-Z can be downloaded here: http://www.techpowerup.co.downloads/SysInfo/GPU-Z/
     
     

     
    Both cards should read as PCI-E 2.0x16 @x8 2.0 at the very least while running the render test. For the SLI option to appear in the nvidia control panel both cards must be able to run at least x8 speeds when under load, if one card runs at x4 while running the render test and the other runs at x8 that is what is causing your SLI option not to appear inside the nvidia control panel.


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
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    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 0:13 PM (permalink)
    Sajin
    Verify both of your cards are running at least x8 speeds. Download GPU-Z and run the render test on each GPU, the render test can be brought up be selecting the question mark circled in green. The red indicates if your card is running at x16, x8 or x4. The orange allows you to switch between the two GPU's.

    Latest version of GPU-Z can be downloaded here: 




    Both cards should read as PCI-E 2.0x16 @x8 2.0 at the very least while running the render test. For the SLI option to appear in the nvidia control panel both cards must be able to run at least x8 speeds when under load, if one card runs at x4 while running the render test and the other runs at x8 that is what is causing your SLI option not to appear inside the nvidia control panel.


     
    I found something interesting. They are both at x16 speeds but the BIOS Versions are different as well as GDDR5 types and sizes are different. Both these cards only have 2Gb of GDDR5 in each of them.
     
      www.imgur.com/a/JMxzx#0
    post edited by Mark467 - Thursday, July 23, 2015 0:29 PM

    i5 4670K @ 4.2GHz 
    2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
    Asus Maximus Hero VI
    Corsair Vengeance Pro 16GB (2 x 8GB) DDR3 1866
    Samsung 840 EVO 120GB SSD (OS) 
    Samsung 84​0 EVO mSA​TA 1TB (game drive)
    Corsair HX 850
     
    #7
    HeavyHemi
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 0:25 PM (permalink)
    Mark467
    Sajin
    Verify both of your cards are running at least x8 speeds. Download GPU-Z and run the render test on each GPU, the render test can be brought up be selecting the question mark circled in green. The red indicates if your card is running at x16, x8 or x4. The orange allows you to switch between the two GPU's.

    Latest version of GPU-Z can be downloaded here: 




    Both cards should read as PCI-E 2.0x16 @x8 2.0 at the very least while running the render test. For the SLI option to appear in the nvidia control panel both cards must be able to run at least x8 speeds when under load, if one card runs at x4 while running the render test and the other runs at x8 that is what is causing your SLI option not to appear inside the nvidia control panel.


     
    I found very something. They are both at x16 speeds but the BIOS Versions are different as well as GDDR5 types and sizes are different. Both these cards only have 2Gb of GDDR5 in each of them.
     
    www.imgur.com/a/JMxzx#0


    Could you clarify? Are you saying both GPU's do not show the same amount of memory of 2048 MB?

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    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 0:26 PM (permalink)
    HeavyHemi
    Mark467
    Sajin
    Verify both of your cards are running at least x8 speeds. Download GPU-Z and run the render test on each GPU, the render test can be brought up be selecting the question mark circled in green. The red indicates if your card is running at x16, x8 or x4. The orange allows you to switch between the two GPU's.

    Latest version of GPU-Z can be downloaded here: 




    Both cards should read as PCI-E 2.0x16 @x8 2.0 at the very least while running the render test. For the SLI option to appear in the nvidia control panel both cards must be able to run at least x8 speeds when under load, if one card runs at x4 while running the render test and the other runs at x8 that is what is causing your SLI option not to appear inside the nvidia control panel.


     
    I found very something. They are both at x16 speeds but the BIOS Versions are different as well as GDDR5 types and sizes are different. Both these cards only have 2Gb of GDDR5 in each of them.
     
    www.imgur.com/a/JMxzx#0


    Could you clarify? Are you saying both GPU's do not show the same amount of memory of 2048 MB?




    Yes. It's in the link. (It's hard to see because I used a workaround since I'm a new member)
    post edited by Mark467 - Thursday, July 23, 2015 0:30 PM

    i5 4670K @ 4.2GHz 
    2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
    Asus Maximus Hero VI
    Corsair Vengeance Pro 16GB (2 x 8GB) DDR3 1866
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    #9
    Zuhl3156
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 0:31 PM (permalink) ☼ Best Answerby Mark467 Thursday, July 23, 2015 2:14 AM
    One is 4 GB and the other is 2 GB and is why SLI won't enable.

     
     https://www.heatware.com/u/100032/to
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    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 0:34 PM (permalink)
    Zuhl3156
    One is 4 GB and the other is 2 GB and is why SLI won't enable.




    This would explain a lot. I'll have to check with my seller because he thought they were identical. 

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    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 0:44 PM (permalink)
    Thanks for the help guys the issue is probably that I have these 2 cards:
     
    newegg.com/Product/Product.aspx?Item=N82E16814130921
     
    newegg.com/Product/Product.aspx?Item=N82E16814130945

    i5 4670K @ 4.2GHz 
    2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
    Asus Maximus Hero VI
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    Samsung 840 EVO 120GB SSD (OS) 
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    evilmustang66
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 0:56 PM (permalink)
    I have a 770 sc 2gb card   Part Number:                   
    Shipped Date:           05/02/2014
    The days left for warranty period : 650 Days
     I upgraded to titan x
    trade for 4gb card if want to so you can sli  I was going to upgrade lil brother comp with it
     
    up to you
    post edited by evilmustang66 - Thursday, July 23, 2015 0:58 PM

     http://heatware.com/eval.php?id=81289  

    z97 evga z97 classy 32gb ddr3 corsair evga g2 1300 psu 1tb ssd etc x2 titan x 3sli with 980 hybrid coolers lian li pc desk
           


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    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 1:02 AM (permalink)
    evilmustang66
    I have a 770 sc 2gb card I upgraded to titan x
    trade for 4gb card if want to so you can sli  I was going to upgrade lil brother comp with it
     
    up to you




    I would love to! 
     
    I can't send PMs yet but let me check with my reddit seller to see exactly what he sent me.
    Can you confirm that this newegg.com/Product/Product.aspx?Item=N82E16814130921
    is what you have?
     
    Do you have a time limit for this exchange (waiting on reddit seller)? I wouldn't want to keep your bro waiting.

    i5 4670K @ 4.2GHz 
    2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
    Asus Maximus Hero VI
    Corsair Vengeance Pro 16GB (2 x 8GB) DDR3 1866
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    Sajin
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 1:25 AM (permalink)
    Zuhl3156
    One is 4 GB and the other is 2 GB and is why SLI won't enable.


    +1


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
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    evilmustang66
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 1:36 AM (permalink)
    Mark467
    evilmustang66
    I have a 770 sc 2gb card I upgraded to titan x
    trade for 4gb card if want to so you can sli  I was going to upgrade lil brother comp with it
     
    up to you




    I would love to! 
     
    I can't send PMs yet but let me check with my reddit seller to see exactly what he sent me.
    Can you confirm that this newegg.com/Product/Product.aspx?Item=N82E16814130921
    is what you have?
     
    Do you have a time limit for this exchange (waiting on reddit seller)? I wouldn't want to keep your bro waiting.


    post 3 more times and you should be able too are in usa
     
    post edited by evilmustang66 - Thursday, July 23, 2015 1:55 AM

    Attached Image(s)


     http://heatware.com/eval.php?id=81289  

    z97 evga z97 classy 32gb ddr3 corsair evga g2 1300 psu 1tb ssd etc x2 titan x 3sli with 980 hybrid coolers lian li pc desk
           


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    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 2:15 AM (permalink)
    Ignore. This is just so I can PM.

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    HeavyHemi
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 3:07 AM (permalink)
    I guess I didn't check back quick enough.  There used to be a hack running around where sometimes you could get GPU's with different memory sizes to work, but it's hit or miss and the stability isn't guaranteed. Not to step on anyone's toes, but the way games are going, if at all possible, 2 4GB cards would be better.

    EVGA X99 FTWK / i7 6850K @ 4.5ghz / RTX 3080Ti FTW Ultra / 32GB Corsair LPX 3600mhz / Samsung 850Pro 256GB / Be Quiet BN516 Straight Power 12-1000w 80 Plus Platinum / Window 10 Pro
     
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    Zuhl3156
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 3:08 AM (permalink)
    +1

     
     https://www.heatware.com/u/100032/to
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    evilmustang66
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 3:25 AM (permalink)
    I would have to agree with heavy keep the 4gb card due to some games are using vram more

     http://heatware.com/eval.php?id=81289  

    z97 evga z97 classy 32gb ddr3 corsair evga g2 1300 psu 1tb ssd etc x2 titan x 3sli with 980 hybrid coolers lian li pc desk
           


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    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 3:37 AM (permalink)
    Ignore. This is just so I can PM 2.

    i5 4670K @ 4.2GHz 
    2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
    Asus Maximus Hero VI
    Corsair Vengeance Pro 16GB (2 x 8GB) DDR3 1866
    Samsung 840 EVO 120GB SSD (OS) 
    Samsung 84​0 EVO mSA​TA 1TB (game drive)
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    #21
    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 3:38 AM (permalink)
    PM 3
     

    i5 4670K @ 4.2GHz 
    2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
    Asus Maximus Hero VI
    Corsair Vengeance Pro 16GB (2 x 8GB) DDR3 1866
    Samsung 840 EVO 120GB SSD (OS) 
    Samsung 84​0 EVO mSA​TA 1TB (game drive)
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    #22
    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 3:40 AM (permalink)
    HeavyHemi
    I guess I didn't check back quick enough.  There used to be a hack running around where sometimes you could get GPU's with different memory sizes to work, but it's hit or miss and the stability isn't guaranteed. Not to step on anyone's toes, but the way games are going, if at all possible, 2 4GB cards would be better.




    Ya I did some quick reserch but Linus somes it up pretty well:
    youtube.com/watch?v=Utv144XeHag

    i5 4670K @ 4.2GHz 
    2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
    Asus Maximus Hero VI
    Corsair Vengeance Pro 16GB (2 x 8GB) DDR3 1866
    Samsung 840 EVO 120GB SSD (OS) 
    Samsung 84​0 EVO mSA​TA 1TB (game drive)
    Corsair HX 850
     
    #23
    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 3:43 AM (permalink)
    evilmustang66
    Mark467
    evilmustang66
    I have a 770 sc 2gb card I upgraded to titan x
    trade for 4gb card if want to so you can sli  I was going to upgrade lil brother comp with it
     
    up to you




    I would love to! 
     
    I can't send PMs yet but let me check with my reddit seller to see exactly what he sent me.
    Can you confirm that this newegg.com/Product/Product.aspx?Item=N82E16814130921
    is what you have?
     
    Do you have a time limit for this exchange (waiting on reddit seller)? I wouldn't want to keep your bro waiting.


    post 3 more times and you should be able too are in usa
     



    evilmustang66
    Mark467
    evilmustang66
    I have a 770 sc 2gb card I upgraded to titan x
    trade for 4gb card if want to so you can sli  I was going to upgrade lil brother comp with it
     
    up to you




    I would love to! 
     
    I can't send PMs yet but let me check with my reddit seller to see exactly what he sent me.
    Can you confirm that this newegg.com/Product/Product.aspx?Item=N82E16814130921
    is what you have?
     
    Do you have a time limit for this exchange (waiting on reddit seller)? I wouldn't want to keep your bro waiting.


    post 3 more times and you should be able too are in usa
     




    I have 12 posts but it looks like I need those and to be a member for 5 days. I'm interested but I would like to find a 4GB version if I can.
    post edited by Mark467 - Thursday, July 23, 2015 4:02 AM

    i5 4670K @ 4.2GHz 
    2 EVGA GTX 770s SC w/ ACX GPU Boost 2.0
    Asus Maximus Hero VI
    Corsair Vengeance Pro 16GB (2 x 8GB) DDR3 1866
    Samsung 840 EVO 120GB SSD (OS) 
    Samsung 84​0 EVO mSA​TA 1TB (game drive)
    Corsair HX 850
     
    #24
    HeavyHemi
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 4:13 AM (permalink)
    Mark467
    HeavyHemi
    I guess I didn't check back quick enough.  There used to be a hack running around where sometimes you could get GPU's with different memory sizes to work, but it's hit or miss and the stability isn't guaranteed. Not to step on anyone's toes, but the way games are going, if at all possible, 2 4GB cards would be better.




    Ya I did some quick reserch but Linus somes it up pretty well:
    youtube.com/watch?v=Utv144XeHag



    Not really. Some newer games require a min of 3GB on board just to use the higher settings. He's just another guy with an opinion doing videos on Youtube.
    I have several newer games that use well over 2GB at 1080p never mind DSR at 4K or using SGSSAA or other forms of AA.

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    #25
    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 7:38 PM (permalink)
    HeavyHemi
    Mark467
    HeavyHemi
    I guess I didn't check back quick enough.  There used to be a hack running around where sometimes you could get GPU's with different memory sizes to work, but it's hit or miss and the stability isn't guaranteed. Not to step on anyone's toes, but the way games are going, if at all possible, 2 4GB cards would be better.




    Ya I did some quick reserch but Linus somes it up pretty well:
    youtube.com/watch?v=Utv144XeHag



    Not really. Some newer games require a min of 3GB on board just to use the higher settings. He's just another guy with an opinion doing videos on Youtube.
    I have several newer games that use well over 2GB at 1080p never mind DSR at 4K or using SGSSAA or other forms of AA.




    That's what he said.

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    #26
    Zuhl3156
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 8:03 PM (permalink)
    Seriously, I wouldn't make an even trade for a 2 GB video board in exchange for your 4 GB model. Try and hold out for a 4 GB board if one becomes available or get some money in exchange for the downgrade.

     
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    #27
    evilmustang66
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 9:05 PM (permalink)
    good luck on your decision I am not going to get into a debate I was just trying to nice about the trade as I was thinking of my own mind even paying shipping both ways but since others have not given the chance to even talk to him by pm yet and assume so good luck looking for what you want mark and welcome to the forum btw
     
     

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    #28
    Mark467
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Thursday, July 23, 2015 9:08 PM (permalink)
    Ya I'm looking for a 4GB version. Thanks for the offer though.

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    #29
    HeavyHemi
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    Re: Unable to activate SLI | EVGA GTX 770 SC w/ ACX Friday, July 24, 2015 4:13 PM (permalink)
    Mark467
    HeavyHemi
    Mark467
    HeavyHemi
    I guess I didn't check back quick enough.  There used to be a hack running around where sometimes you could get GPU's with different memory sizes to work, but it's hit or miss and the stability isn't guaranteed. Not to step on anyone's toes, but the way games are going, if at all possible, 2 4GB cards would be better.




    Ya I did some quick reserch but Linus somes it up pretty well:
    youtube.com/watch?v=Utv144XeHag



    Not really. Some newer games require a min of 3GB on board just to use the higher settings. He's just another guy with an opinion doing videos on Youtube.
    I have several newer games that use well over 2GB at 1080p never mind DSR at 4K or using SGSSAA or other forms of AA.




    That's what he said.




     
    Ha...you're right. I was thinking of one of his older videos. My bad.

    EVGA X99 FTWK / i7 6850K @ 4.5ghz / RTX 3080Ti FTW Ultra / 32GB Corsair LPX 3600mhz / Samsung 850Pro 256GB / Be Quiet BN516 Straight Power 12-1000w 80 Plus Platinum / Window 10 Pro
     
    #30
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