Hi Puddled,
I have a Gt610 as well (worked fine on mavericks) ; did a fresh install of yosemite (downloaded from app-store).
1st install went fine, but when i applied multibeast / easybeast and rebooted, it went to sleep half way thru loading and never came back.
I then re-installed it but once the install finishes it goes to sleep and never comes backup.
System : Optiplex 7010, GT610 Intel Nic (nic was detected by default and sata controllers as well)
Also, GT610 was detected but monitor resolution was 1024x768 (Monitor connected via DVI - 19inch MOnitor)
Will be grateful for your expert - help and opinion - thanks
Thank you everyone for this superb forum
Kind regards