Sli gtx 680

[Erik_29]

I asked a question here earlier about if it was possible to sli two 680 with different ram, it was not. To my "problem", i have both the 680´s in my computer with one pci-e slot inbetween to maximize airflow and, both sits in x16 slots. And now i get a message from nvidia control panel: "to use maximum 3d performance connect the sli-ready graphics cards with an sli connector". I have connected them but it does not go away. before i did not even see the sli section of the controll panel even though it had detected both of my cards. ? I dont really know what my question is but i guess i want some clarity to the situation. and also, can different cards get some benefit from sli even if they are not compatible? ( one card is 4 gb and one is 2gb, i have an gigabyte x79 ud5 motherb)

 

[Calculagator]

You can connect two 680s via SLI even with different memory as long as you are willing to only use the lesser memory. In your case, the 4GB card would effectively lose 2GB. That may or may not give you better performance depending on the game.

Regarding the error message: make sure the SLI bridge is firmly connected. You should also make sure that you are using slots in your motherboard that actually support SLI for both cards. Not all do.

Apart from SLI, some games may benefit if you use one card as a dedicated Physx processor. Some new DX12 games may be able to use both cards without SLI for a performance bump.