will GTX 1060 work with MotherBoard Gigabyte EP43-DS3L with no UEFI Bios?

It wouldn't work, the new cards all require you to have a UEFI BIOS.

Yes, it'll work.

any evidence for that?

I think the 1000 (and like 700-900) series cards have support for UEFI Fast Boot, and cards that don't may not work when fast boot is enabled.

900 card and above need full uefi bios and then that's no guarantee unless the uefi bios in new oir its been updated to support newer cards

like here for example

http://www.tomshardware.com/answers/id-3184420/gigabyte-z77-d3h-ver-problems-installing-zotac-gtx-1070-amp.html

see he had a uefi bios but it did not support the newer cards until he used the latest beta bios and did [got lucky]

this guy maybe just S.O.L and left holding the bag ??

http://www.tomshardware.com/answers/id-3181106/graphics-card-issue-gtx-980.html

I would not risk it plenty of forums and all on this

potentially learn something new every day then.

http://forums.evga.com/GTX-1060-series-and-Legacy-BIOS-m2534700.aspx

you could roll the dice on the card but ?? you got to know your 775 is a outdated phased out forgot platform and these new cards are for latest systems . even if it was to work all your old system is going to do is chock the card from its full performance..

maybe at best I would go with a gtx 750 ti or just something in the 700 series if you can find anything over the 750 these days [there phased out now as well and gone ]

the push / trend going on today is to get rid and you off all this old hardware by them not having full if any support for them

now its you support them instead of them supporting you and your needs and if you want to use there latest parts you better have all the latest hardware to run it on

like how its got with windows 10 I feel in 2 years if you don't use 10 your not using anything anymore cause they will drop all support for anything under it as well [hide and watch] its all coming down to super proprietary there way or no way

these parts are geared for uefi use and it may work somewhat under legiay bios but then may not get full features or what ever doing so ?

this was on of the concerns when uefi came in to play was the fact venders can now manipulate there hardware in how they feel it can be used on on what it can be used on all they now got to do is add or remove microcode and dictate if it will work on something or not

so if msi were to say there cards will only work on there boards all they got to do is adjust the uefi bios and lock out what ever they want to for a example and if they don't share the microcodes with say asrock or asus too bad so sad its a no go

sad thing is folks thing its all good and the best ever and just don't know what there doing to them selves like accepting Microsoft ways as great when its all a proprietary trap and now your stuck like how it is with pc games .. think if you could load and play games on Linux as easy as you can windows woukld you still pay 100$ for windows when Linux does all the rest as easy for free ??

get it ??

same concerns with newer AMD cards as well ?

https://community.amd.com/thread/202679

https://forums.anandtech.com/threads/no-uefi-mobo-no-480-10xx.2479452/

bottom line is you need to get a new up to the date system