Hello Mikael,
I have the same problem as p490. I downloaded the newest drivers for both graphic cards and followed your stepts in the NVIDIA control panel – without success. Any ideas what might help?
Operating System
Windows 7 Home Premium 64-bit SP1
CPU
Intel Core i7 2670QM @ 2.20GHz 52 °C
Sandy Bridge 32nm Technology
RAM
8,00GB Dual-Channel DDR3 @ 665MHz (9-9-9-24)
Motherboard
ASUSTeK Computer Inc. N75SF (CPU 1) 57 °C
Graphics
PnP-Monitor (Standard) (1920×1080@60Hz)
Intel HD Graphics 3000 (ASUStek Computer Inc)
2047MB NVIDIA GeForce GT 555M (ASUStek Computer Inc) (Version NVIDIA 347,09)
Storage
698GB Seagate ST9750423AS (SATA) 34 °C
119GB OCZ-VERTEX4 (SSD)
Optical Drives
DTSOFT Virtual CdRom Device
HL-DT-ST BDDVDRW CT30P
Audio
Realtek High Definition Audio