Asrock N68-S
http://www.asrock.com/mb/manual.asp?Model=N68-S
в мануале сказано, если share memory = auto, то встроенное видео отключено
п 2.5. If you do not adjust the BIOS setup, the default value of “Share Memory”, [Auto],
will disable onboard VGA/D-Sub function when the add-on VGA card is inserted to this motherboard.
скорее она у тебя не инициализирует эту гриновую внешнюю.
есть второй моник? если да, то проверь - выставь share memory на одно из предлагаемых значений
2.5 Easy Multi Monitor Feature
This motherboard supports Multi Monitor upgrade. With the internal onboard VGA and the external add-on PCI Express VGA card, you can easily enjoy the benefits of Multi Monitor feature. Please refer to the following steps to set up a multi monitor environment:
1. Install the NVIDIA® PCI Express VGA card to PCIE2 (PCIE x16 slot). Please refer to page 15 for proper expansion card installation procedures for details.
2. Connect the D-Sub monitor cable to the VGA/D-Sub port on the I/O panel of this motherboard. Connect another D-Sub monitor cable to the VGA/D-Sub connector of the add-on PCI Express VGA card. Connect the DVI-D monitor cable to the VGA/DVI-D connector of the add-on PCI Express VGA card.