Graphics card turns off

[metamorphpwner]

Anyone know what can be causing my graphics card to just randomly turn off?
everything else seems to be running, but the screen turns off with the no signal message on it.
it doesn't BSOD or black screen(technically does) but music still player perfect and can still game ect.... was playing grid and could keep driving buy nothing was getting displayed.

 

[TheCenturion]

what card? What firmware? what system spec? PSU? we need to know this to help you

 

[metamorphpwner]

what card? What firmware? what system spec? PSU? we need to know this to help you

9600GT with the latest drivers( vista auto-update)
vista ultimate 64bit
corsair 650W PSU
asrock alive Sata2GLan- motherboard
2x1 GB corsair XMS2 5400+ RAM
AMD Athlon 6400+ BE

 

[TheCenturion]

is the cable from gfx to monitor secure? is it a good cable? it could be your monitor or the system is overheating? what are temps?

 

[metamorphpwner]

is the cable from gfx to monitor secure? is it a good cable? it could be your monitor or the system is overheating? what are temps?

GPU doesnt go above 45, and that's when it's really stressed, CPu idles at about 40 and reaches above 70 at times. i've got all cables in secure, power to the card and to the monitor, the VGA cable to monitor from the card.
but if it is the CPu heat i don't think the graphics card would just stop displaying

Anyone know is a 4670 is around the same performance as this/better?, they're fairly cheap as a temp card.