I own a GV-R587UD-1GD as you have realized from the title
The problem i m having is very weird. Sometimes, not always, after trying to restart my pc ( i m on Windows 7) once upon boot and windows logo appears, a weird sound comes from the gfx like "sqeeeek" and monitor goes black there is no signal display BUT the pc enters windows normally, i can hear windows sounds and everything. It is not a driver issue i m on latest drivers, and this problem pre-existed with older drivers. I ve also updated to F8 BIOS but still no luck. And its not a PSU issue i own a TAGAN 800W which runs a power hungry 9800 gx2 with no problems at all. This might also happen just upon boot, when Gigabyte logo shows ( i own a ep45 qd6 motherboard) same sound from gfx "sqeeeeeek" and no signal. In order to fix this problem i have to pull the gfx off the pc tower for a while and put it back, sometimes it works sometimes it does not. Its driving me crazy, does anyone have any ideas?
Edit: i found this threat here
http://forum.giga-byte.co.uk/index.php/topic,5427.msg43726.html#msg43726 i ll give it a shot i hope it works