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Brand New 6870 not working =/

Last response: in Graphics & Displays
May 10, 2012 5:28:39 PM

hey guys, :hello: 

I need some help.

I got:
Biostar67b+ motherboard
16g ddr3 G.skill memory
ASUS Ati 6870HD DirectCU
i5 2400k

I bought the GPU about a week ago, installed it and my monitor is telling me "no signal" I made sure everything was plugged in correctly. So I assumed that it was my 400w power supply that was the problem (the 6870 requires 500w).

I got a new 600w power supply made sure everything was plugged in right...still "no signal" :fou: 

Any ideas?

More about : brand 6870 working

a b ) Power supply
May 10, 2012 5:35:34 PM

A lot of monitors have multiple inputs. Make sure your monitor is set to whatever input you are using with your GPU
May 10, 2012 5:43:16 PM

My monitor is an Acer from maybe.....4 years ago? It's a Flat screen (wide) It has a DVi and a VGA both are labeled "In"

In the past when I used VGA, and than upgraded to the dvi the monitor automatically switched to that input on it's own.

I'm going to install the old card and than install the drivers for the new 6870, and see if that helps
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a b ) Power supply
May 10, 2012 5:44:40 PM

The computer should still boot with the new card, the resolution will be messed up until the drivers are installed, but it will still output a signal.

What MB do you have?
a b ) Power supply
May 10, 2012 6:10:51 PM

What power supplies are we talking about here?

A cheap 400w psu will only put out about 300w max, a cheap 600w psu will only put out about 400-450w max.
May 10, 2012 6:42:43 PM

Mother board is: Biostar TP67b+

PSU is: PC Power and Cooling Silencer MK III ( )

I just installed the old card, and it gave me the same "no signal" message again. So I rebooted again, and this time it told me windows could not start and forced me to do a system restore. The restore took about 30 sec and than it rebooted and all was fine. (on the old card)

May 10, 2012 6:44:24 PM

Even if the psu was giving out 450 I don't believe that a 50w difference would be a problem when it came down to displaying something. Wouldn't it just hurt the life-span of the card?
May 10, 2012 7:04:59 PM

What was your old card model?
May 10, 2012 7:48:21 PM

Old car is a radeon something. only 512mb of ddr.

Update: I left the old car in and put the 6870 back in. I had the monitor plugged into the 6870 and the display was there. I installed the drivers from the CD and was prompted to restart the system. I restarted the system, got passed the bios, and the windows log in. Once the desktop starts to load I get a blue screen telling me something is wrong with the display drivers, and dumping physical memory.

That being said, an new ideas as to why I may be getting blue screened after driver installation?

Edit: I let the drivers install automatically (default folder) from the CD that came with the card
May 10, 2012 8:29:33 PM


When I boot in safe mode, there's no blue screen. everything works fiine
May 11, 2012 1:36:15 AM

Bump for any helpful in put
May 12, 2012 10:40:25 AM

Hm. Similar case to me with new gigabyte 6870, I even reinstalled windows, turned out to be a faulty card. Swapped it out for a sapphire 6870 and haven't looked back. Is this card new?
May 12, 2012 11:24:33 AM

It sounds like problems with drivers. You can download DriverSweeper, install it then boot in safe mode, go to add/remove programs, uninstall all graphic drivers, don't restart just yet, open DriverSweeper, click on anything that say AMD or nVidia and clean them. Then shut down. If you do all steps above with the old card, time to switch to the new card. Turn on and Windows should load generic VGA driver for your new card. Then go AMD web site, download the latest driver and install it.

If it still won't work, you can re-install windows to troubleshoot the problem from the start. If all fail, time to RMA.
May 12, 2012 11:26:08 AM

If you do RMA, go for Sapphire. 15% restock fee is totally worth it.