Crossfire 27QLED-P with HD4600 - won't work

[the_gael]

I have an issue which I believe is hardware related as I get a double beep from the bios and it will not display join this monitor Crossfire 27QLED native resolution 2560x2048.

 

I can swap to a BENQ GL2450-T which has a native resolution of 1920x1080 and it works perfectly. 

 

I am using DVI Dual Link cable which I simply swap between the monitors for testing with the other end connected to my board

 

Board - Gigabyte Z97X-SLI, 

CPU - Intel i7-4770k

Onboard Graphics HD4600

 

Yosemite 10.10.1 with Clover v2k_r3065

Intel injection selected via Clover Configurator

 

I want to use this monitor which I have previously used with Mavericks and a EVGA GT640 (want to use the onboard graphics now due to an issue with the nVidia drivers).

 

I suspect this is something simple which I am missing so all suggestions gratefully accepted as to why my Crossfire does not play with the HD4600.

 

Monitor does work with the nVidia card but am plagued by the nVidia reboot issue.

 

 

Edited to add

just discovered if I change CSM support from Never to Always I get some text from the Clover boot loader, although still can't boot - perhaps this is a boot loader config issue

Edited December 23, 2014 by the_gael

[MacUser2525]

"perhaps this is a boot loader config issue"

 

Doubt it the specifications of my board and I suspect yours states 1920x1200 maximum on both the dvi and vga ports for higher resolution you need a hdmi or display port connection.

[the_gael]

"perhaps this is a boot loader config issue"

 

Doubt it the specifications of my board and I suspect yours states 1920x1200 maximum on both the dvi and vga ports for higher resolution you need a hdmi or display port connection.

thanks for that