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Discrete GPU during startup but integrated GPU after loading

post #1 of 9
Thread Starter 
Hi guys, ever since my PSU died and i replaced it with a Corsair TX-650M, i just cannot get my GTX670 to work after windows 8 loads.

The GPU will only work before the login screen although the resolution is out of whack (DVI-D connection). Even when i enter BIOS, the resolution is wrong so i can't see the entire BIOS on my screen. It will log into safe mode fine, though in low resolution.


As soon as i reach login screen, the screen goes completely blank when using my GPU. I have to switch to VGA integrated GPU on my motherboard. Funny thing is the integrated GPU only starts working from the login screen. The screen is fully blank, including BIOS menu when i try to use integrated GPU only.


Device manager recognises my GTX 670, i have the latest nvidia driver installed. Although UEFI recognises it as Nvidia VGA when i hover my mouse over the PCIE slot.

I tried uninstalling gtx670 on device manager to reset but it didn't help.

I completely uninstalled and removed all signs of nvidia driver which seems to have fixed the problem. I can login using my gtx670 although the resolution is still out of whack. As soon as i reboot after installing the driver or letting windows 8 install it, the screen goes blank from login screen onwards.

I tried installing the latest driver and also the BETA but still the same problem. The GPU will kind of work when there is no driver installed but in low resolution only, as soon as i reboot after driver install the screen is blank.

My motherboard is ASrock Z77 Pro3 with latest BIOS.

What to do??

EDIT: Also the GPU goes full fan speed for a second after i power on, and then goes back to normal speed which hasn't happened before i changed the new PSU.
Edited by NitroBenzene - 3/15/13 at 4:13pm
post #2 of 9
Thread Starter 
bump
post #3 of 9
Thread Starter 
EDIT: Also the GPU goes full fan speed for a second after i power on, and then goes back to normal speed which hasn't happened before i changed the new PSU.
post #4 of 9
Thread Starter 
EDIT: Also the GPU goes full fan speed for a second after i power on, and then goes back to normal speed which hasn't happened before i changed the new PSU.
post #5 of 9
Thread Starter 
bump
post #6 of 9
Thread Starter 
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post #7 of 9
Ok, let me see if I'm understanding this right. You have just the DVI cable connected until the startup screen then it goes black... but if you use the integrated video it doesn't show up at all until the login screen? And you don't have both vga and dvi connected from the card and mobo to the screen right? I only ask that because I've had ppl do that before. I went through something similar where I added a GTS 450 to my cousins HP AMD pc that only had integrated video. I had to uninstall the AMD drivers, install the card, tried the driver from the CD but it went to a black/green line screen and wouldn't boot with video but the card would just ramp up to full speed and stay there. Ended up being a driver that didn't play nice, so I uninstalled that and then just installed the latest from the Nvidia site and everything worked like a charm after that. I would try a different driver from the Nvidia site, possibly the 2nd latest or 3rd one to try and find one that works for now. Don't let Windows install the driver from its own update service, i.e. system update that checks for the latest security and program patches through microsoft. I've had ppl try the graphics drivers from windows rather than the manufacturers site and that has almost always ended up screwy. Sorry if I'm rambling, just trying to run this through my head.
post #8 of 9
1st things 1st, when you boot into windows on the integrated gpu and you go into device manager does windows show there is a 670 hooked up? If not maybe your card fried when your psu died? Hopefully not though! Just reread through your OP and it kinda sounds like that may be what happened though.. frown.gif

Have you tried removing your card, booting with integrated graphics, shut down, reinstall the card and boot a few more times until the bios recognizes the dedicated gpu? From there the OS should as well. You should also be able to set the dedicated card as the primary card in your bios, but that should be done automatically. If that doesn't work I would try booting into windows on w/e gpu you can and uninstalling all the graphics drivers in windows. Restart, plug back into your dedicated card (dvi cable) and it should work.

Make sure you have all the power plugs ran into your gpu as well. For booting it can get all the power it needs form it's PCI-e port but once in windows it will require external power.
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LiquidGlass
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Case Labs ST10-X
(17 items)
 
Raven (Sold)
(15 items)
 
CPUMotherboardGraphicsRAM
i7 7700K Asus Rog Strix Z270i Zotac GTX1080TI FE G.Skill Trident RGB 
Hard DriveCoolingOSMonitor
Samsung 960 Evo Custom Loop Windows 10 Pro OLED55C6V 
KeyboardPowerCaseMouse
Logitech G810 Corsair SF600 Lian Li Q37 Logitech G403 Wireless 
Mouse PadAudio
Corsair MM300 Bose CineMate GSII 
CPUMotherboardGraphicsGraphics
Intel Core i7 3820 Gigabyte UP4 ATI Radeon HD 7970 3GB ATI Radeon HD 7970 3GB 
GraphicsRAMHard DriveHard Drive
ATI Radeon HD 7970 3GB Corsair Vengeance DDR3 Ram OCZ Vertex 4 SSD 128GB OCZ Vertex 4 SSD 128GB 
Optical DriveCoolingOSMonitor
Blu Ray Reader & DVD-RW Burner Custom Watercooling Loop  Microsoft Windows 8 HP w2558hc 
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post #9 of 9
Thread Starter 
Thanks guys, it worked straight away after i switched to using displayport.

Does this mean my dvi-d ports on my gpu are dead?>
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