Just now i have been experiencing random crashes where everything cuts out, my skype call i was in ends and other applications show no signs of still running, the screen goes black and my monitor goes into sleep mode. The weird thing it my PC is still running, all fans lights etc, except there is no response not even a BSOD post therefore i have to force shutdown.
I am completely stumped as to what is causing this or why it is happening, any help would be very much appreciated.
I would be thinking power supply related or high temp. Open the side of the case and see if it still happens, might just be time to clean the dust out. This type of thing is very often power supply going bad. Try removing and resetting the power connecters to the components.
Still sounds PSU related to me. With the MB still getting power (The weird thing it my PC is still running, all fans lights etc.) but the video output dead (the screen goes black and my monitor goes into sleep mode). What you describe is the as if the power to the video card is shut down. Can you please try to power the card using one of the other rails? Even under full load you draw about 285W for the card so I do not think the PSU size is the issue. So please try removing and resetting the card in its' slot and as before doing the same for the power to it. Do you have any spare components available to swap in and out?
A lot of people have been having problems with skype, you might need to update to suit your OS. Windows 8 Skype needs a new install so you'd need to uninstall your current skype if it is not already a Windows 8 version.
Even if your OS is Windows 7, Skype seems to be interferring with other apps that are also opened.