Screen flashes after putting in a new graphics card

[Simon_49]

So I've built my computer a short while ago and everything was working fine. Then I put an R9 270x and I ran a DVI cable to my monitor from the graphics card. At first I was getting a black screen and the image it was supposed to show was flashing occasionally on the black screen. After a bit of messing around I seemed to get it working and I ran a couple of games and benchmarks to make everything was good. However I still get this flashing black screen which I seem to get mostly after the computer wakes up from sleep mode (it never happens on its own while the computer is on).
I didn't have any problems running a VGA and the DVI from the motherboard to the monitor and my drivers seem up to date as far as I can tell.
Z97 pc mate, i7 4790k, 750w psu
Any suggestions ?

 

[Stan1023]

What is the psu? The psu could not have enough watts in the +12v rails so it is not fully stable or the psu is not very efficient (meaning it does not deliver the advertised wattage of 750)
It could also be a driver issue, newer driver updates "can" cause issues so you could try to rollback to a previous driver (if it came with install disk you can try that)

 

[Simon_49]

The psu is a Thermaltake 80plus bronze.

 

[Stan1023]

The psu is a Thermaltake 80plus bronze.

Okay so it is efficient and a good psu so not that, I would try the driver first

 

[Simon_49]

I'll try the drivers but I was getting the same issue prior to installing any drivers.

 

[Stan1023]

I'll try the drivers but I was getting the same issue prior to installing any drivers.

Okay, what windows do you have btw? I have heard some issues with waking up on certain windows with many graphics cards, some go to the extreme where it wont wake up, you have to reboot so it may be one of those. I will do further research into this because it affects many people.

 

[Simon_49]

I'm using windows 10. Would you recommend downgrading back to windows 7 ?

 

[Stan1023]

Well that is up to you, I don't think it is just because of windows 10, this bug has been around for many windows so I don't know if this will fix it but it might, it could be another hardware issue too, hard to say as I haven't seen really any solutions for this other than not going into sleep mode and just turning off pc or leave it on with a screensaver

 

[Simon_49]

Seems to be working fine except that it takes a few minutes to stop flashing when I turn on the computer. Anyways, thanks a ton for the help.

 

[Stan1023]

Seems to be working fine except that it takes a few minutes to stop flashing when I turn on the computer. Anyways, thanks a ton for the help.

Okay your welcome sir, if I ever come up with a solution in the future I will message you because I know that can be annoying, I just believe it is a common bug with windows (even look it up, windows wakeup problems)
For example, this person is having problems with waking up too on windows 10 (it is not the same as your but this area seems to have many different problems): http://answers.microsoft.com/en-us/windows/forum/windows_10-security/windows-10-sleep-wake-up-problem/db825c9a-551e-4786-9b39-daf1d170f910?auth=1

 

[Simon_49]

Yeah I seem to be needing to fix stuff in windows 10 I never even had to think about with any previous version.

 

[Stan1023]

Yeah I seem to be needing to fix stuff in windows 10 I never even had to think about with any previous version.

If you are having many problems with windows 10, downgrade to windows 8 or 7 (depending on what you had before)
Windows 10 is not perfected yet, there are still many bugs even after it has been out for a year