This is a laptop but I have tried it with vga out and it doesn't have any problem. It also has HDMI out but I haven't tried that. The refresh rate has only 60Hz as an option. Could DirectX 10 be causing this since nothing changed between Vista and 7 but I didn't seem to have the issue on Ubuntu or Backtrack4??? Here is my specs if it helps at all.
Manufacturer Hewlett-Packard
Family 103C_5335KV
Product Name HP Pavilion dv5 Notebook PC
Disk Space Disk C: 193 GB Available, 465 GB Total, 193 GB Free
CPU IntelĀ® Core2 Duo CPU P7350 @ 2.00GHz
Physical Memory 3070 MB Total
Maximum Memory Capacity 8192 MB
Virtual Memory 6137 MB Total, 3365 MB Free
Display Adapter NVIDIA GeForce 9200M GS (256MB Memory)
Resolution 1280x800@60Hz
DirectX 10