GPU not detected by my PC

March 21, 2012 at 03:10:06
Specs: Windows 7, 4gb
Hi heres my problem, Ive been gaming on this pc for 4 weeks now and after installing ArmA 2 Free i started playing it no problems but after first 5 mins my screen turned black, So I turned it off and on again there was no display,so i used onboard video card with the blue cable thingy and went to check devicemanager to see what was wrong with my GPU (AMD Radeon 6870 powercolor) and it wasnt being detected i tried to play a game (minecraft) and it said

"Bad video card drivers!

Minecraft was unable to start because it failed to find an accelerated OpenGL mode.
This can usually be fixed by updating the video card drivers."

AMD FX 6100 Black Edition

CPU Cooler: Coolermaster Hyper TX3

Operating System: Microsoft® Windows 7 Home Premium 64-bit
Motherboard: Gigabyte M68MT-S2P
Memory: NEW! 4GB Corsair DDR3 1600mhz Vengeance (1x 4GB)

Hard Drives: 500GB S-ATAII 3.0Gb/s

Optical Drive: 22x DVD±RW DL S-ATA

Graphics card: AMD Radeon HD 6870 1GB

Sound card: Onboard 7.1 Audio

Keyboard and mouse: Logitech USB Keyboard

Accessories: DVI to HDMI cable

Case: Xigmatek Asgard

PSU: 400W Xigmatek

See More: GPU not detected by my PC

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March 21, 2012 at 05:22:41
Check your BIOS for video card settings.
Try Safe Mode with networking, if it is just the driver, then the default Windows driver will run the card, if it does, just download the newest driver and install it.

You have to be a little bit crazy to keep you from going insane.

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March 21, 2012 at 05:28:42
Here's your problem >>> PSU: 400W Xigmatek. For one thing, it's not a quality brand. For another, Powercolor recommends a minimum of 500W for the HD 6870:

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March 21, 2012 at 14:04:17
Sorry for the late reply but it might be the power supply im not sure but when i took the side panel off and turned it on the GPU's fan was running. I also noticed that the 6 pin PCI has like 2 wires like in one box thing on the end that you stick in the GPU is this a problem?

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March 21, 2012 at 20:57:38
Probably IS the power supply (I did not notice it the first time through the specs) BUT.....
"6 pin PCI has like 2 wires like in one box thing on the end that you stick in the GPU is this a problem?"
Drop the 'like' (two times) and add real words that describe exactly what you are seeing so we can understand you.
The only images of your video card type (you do not list exact make & model) shows two 6pin PCIe connectors, these must BOTH be connected to your power supply. As far as I can tell your power supply only has one of these connectors. In order to properly fill the other you would need a PCIe 6pin 'Y' connector that allows you to use two of your 4 pin Molex connectors to power that one connector. BUT since what riider pointed out is true, you will need to replace the power supply so make sure you get a quality power supply that has only a single 12Volt rail, is 80% certified efficient or better, has active PFC, has at least 500Watts (probably 600Watts), has around 50 Amps on it's 12 Volt Rail, and has at least two 6pin PCIe connectors.

You have to be a little bit crazy to keep you from going insane.

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