The T610 and other PE servers have the ability to disable the embedded video controller within the integrated devices section of the bios. However to access and change the setting from the default 'enabled' to 'disabled' , a PCIe video card must be placed into a PCIe slot. In the case of the T610, no x16 PCIe slot exists so you need a x1 PCIe card (expensive) or you need to modify a x16 card to fit (cheap if you have a spare one like i did). Luckily for you, the T710 does have x16 slots so you have a larger base of x16 cards to choose from. Just ensure you don't exceed the PCIe power allowances and be aware that in disabling the embedded video, you also loose some features (virtual kvm, etc). It's all documented in the hardware owners manual. Also, there are many posts regarding PE server video cards. Searching the forum for 'T710 video card' would have yielded this post at the top of the result. Searching 'T610 video card' gives a few more, this post which includes a picture of my modified card.
Hi All,            I have a problem when I install ASUS EAH6870 VGA card in to PE T710 the server install Windows Server 2008 R2 on device manager windows can detected and install ASUS VGA card driver but can't send display signal to all monitor so I try to disable onboard VGA in bios but I can't find menu for disable it so if someone have a solution for solve this problem please share it for me.
How to disable onboard VGA on PowerEdge T710