4 Way Sli bridge only detecting 2 out of 4 cards

[sQuik]

Im having problems getting my SLI bridge to work.

i am using 2x evga gtx 780 hydro copper and 2x zotac gtx 780 AMP! (all 3gb cards)
all cards are registered in nvidia control panal, but only 2 of them are connected via the SLI bridge

http://

They are all connected with asus 4 way sli bridge

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I did have some problems getting the bridge on one of the cards but was able to slide it on after some fiddeling.
so im wondering if it might be the bridge wich is bad or doesnt have a good connection after i have to use abit of force to fit it on, or if its the 2 different type of cards that wont SLI as its only the zotac cards it will detect the bridge on? The evga cards have been running in SLI previously without any problems.
Any ideas?

Full system specs are
Motherboard: Asus rampage IV black edition
Cpu: intel i7-4930k
Ram: 32gb g.skill tridentx 2666 mhz
Gpu's: 2x evga gtx 780 hydro copper, 2x zotac gtx 780 AMP!
Power supply's: Corsair RM1000 (1000W) connected to evga cards and pumps,fans, lighting etc, evga supernova g2 (850W) connected to zotac cards motherboard and cpu
HDD: samsung evo 840 256gb, Seagate Barracuda 2TB

 

[Knicks2012]

I dont think you can sli bridge 2 different cards, i think it onmly works for crossfiring amd cards

 

[sQuik]

i'm pretty sure i did do my research good enough on that part before getting the other cards,
Can I mix and match graphics cards from different manufacturers?
Using 180 or later graphics drivers, NVIDIA graphics cards from different manufacturers can be used together in an SLI configuration. For example, a GeForce XXXGT from manufacturer ABC can be matched with a GeForce XXXGT from manufacturer XYZ.
Source: http://www.geforce.com/hardware/technology/sli/faq

 

[giantbucket]

What happens when you connect everything using ONE power supply? Maybe there's ground issues or 12V line issues due to dual supplies. Nothing will explode if you're not playing intensive games.

 

[sQuik]

i will have to try that, sadly neither of the power supplies have cables enough to connect all 4 cards to 1, so i will have to go try get some cables first.

 

[sQuik]

Okey so i have an little update.
i have tryet to plug 1 of each card (1 zotac, 1 evga) to same PSU and then just a single SLI bridge between thoose 2, and i was able to get them to SLI.
i then tryet to SLI 1 zotac with evga PSU and 1 zotac with corsair PSU and also got them to SLI with a single bridge.
i think next step is to get a hold of some more single bridges and try do a 4 way SLI with 3 single bridges?

 

[Mousemonkey]

I dont think you can sli bridge 2 different cards, i think it onmly works for crossfiring amd cards

So long as the GPU's are the same they will SLi, so the OP could run two of the EVGA cards and one of the Zotac cards in 3 way SLi.

The problem the OP has is that they are trying to do 4 way SLi with non Ti cards that can only run in a maximum of 3 way SLi.

http://www.geforce.com/whats-new/articles/introducing-the-geforce-gtx-780-ti

 

[Knicks2012]

I dont think you can sli bridge 2 different cards, i think it onmly works for crossfiring amd cards

So long as the GPU's are the same they will SLi, so the OP could run two of the EVGA cards and one of the Zotac cards in 3 way SLi.

The problem the OP has is that they are trying to do 4 way SLi with non Ti cards that can only run in a maximum of 3 way SLi.

http://www.geforce.com/whats-new/articles/introducing-the-geforce-gtx-780-ti

ok thanks

 

[sQuik]

if im understanding u correct, 4 way sli with non TI cards are not possible?
Would something like this be able to work around such an issue?
http://videocardz.com/45253/nvidia-geforce-gtx-780-4-way-sli-possible-by-simple-modification

 

[Mousemonkey]

if im understanding u correct, 4 way sli with non TI cards are not possible?
Would something like this be able to work around such an issue?
http://videocardz.com/45253/nvidia-geforce-gtx-780-4-way-sli-possible-by-simple-modification

I don't know, why don't you try it?

 

[sQuik]

yea, was a probably long shot too see if any1 else had played arround with this.
im gonna play around with it abit perhabs trade them out for 4 980's