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Very weird faulty reference Galax GTX970

post #1 of 6
Thread Starter 
My rig is in my signature. Win8 64bit, WHQL driver 344.16, original VBIOS. The card is quite rare, but I don't think it is fake, since benchmark results is the same as other reference 970s. I bought it from a big vendor in Hong Kong one week ago.

The card, on a good day, works great. It easily passes Furmark(71 degree max), 3DMarks 13 Firestrike(11000 GFX score).
On a bad day, which is 80% of time, 1 of 3 situation occurs:
1. POST successful(num lock working, log in Windows indicates a successful start up, connects to the router), but monitor detects no signal. Can't tell if it slows down.
2. Start up screen significantly lags. The dots which normally spin fluently in a circle on Win8 start up screen are instead stagnant. After start up, the computer is painfully and increasingly slow, making it impossible to launch even the browser; in 1 minute, the screen goes black; after perhaps 3 minutes, it comes back to normal, while NVIDIA driver says itself had stopped working and recovered.
3. Much the same with 2, except the slowing down starts some time later, when I am browsing or listening to music. I was even able to run 3dmarks firestrike one time in this situation, and scored 400 GFX points. Behold:


Power/temperature is not likely an issue. My PSU is rated at 450w, which easily drives my i5 4590 and GTX970. If power/temperature is an issue, it should manifest itself consistently. Instead, the rig was able to pass 30 minutes of furmark just before I write this thread.

OS might be a problem. I had another AMD display card installed, and I also used Intel integrated display. Of course, I have cleanly uninstalled Intel and AMD drivers. I heard one should reinstall the entire OS if one switch from one brand of VGA to another.
Edited by 95139ieaci - 10/22/14 at 5:36am
    
CPUMotherboardGraphicsRAM
Intel i5 4590 ASRock B85M-ITX GALAX GTX 970 reference 4GB Adata 4g*2 DDR3 1600 
OSPowerCase
Win 8 64bit Silverstone SST-ST45SF Silverstone RVZ01 
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CPUMotherboardGraphicsRAM
Intel i5 4590 ASRock B85M-ITX GALAX GTX 970 reference 4GB Adata 4g*2 DDR3 1600 
OSPowerCase
Win 8 64bit Silverstone SST-ST45SF Silverstone RVZ01 
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post #2 of 6
http://www.overclock.net/t/1520185/weird-evga-gtx970-problem

I have a very similar problem here with my card where the card will boot up fine. As soon as I installed the nvidia 344.16 driver and the screen will display artifact all over at desktop. I fixed it by changing the PCI express bus speed from 2.0/1.1 to 3.0 and it solved my issue. So maybe you should try that out. I have 400w power supply and after that change, I was able to run games without any issue last night, but I will try more testing to night to see.
post #3 of 6
Very strange. I'll check with our engineers and see what advice we can get on this issue.
post #4 of 6
FYI, new 344.48 drivers just came out yesterday:

http://www.geforce.com/whats-new/articles/geforce-344-48-whql-driver-released

In case Marik123's advice didn't solve the problem already, you might go grab the update and see if that fixes it.
post #5 of 6
Thread Starter 
Quote:
Originally Posted by Galaxy View Post

FYI, new 344.48 drivers just came out yesterday:

http://www.geforce.com/whats-new/articles/geforce-344-48-whql-driver-released

In case Marik123's advice didn't solve the problem already, you might go grab the update and see if that fixes it.

Here is an odd one:
Switching the two 6 pin psu connectors with each other fixed the problem, it seems.
Go figure. And that was before the driver update.
    
CPUMotherboardGraphicsRAM
Intel i5 4590 ASRock B85M-ITX GALAX GTX 970 reference 4GB Adata 4g*2 DDR3 1600 
OSPowerCase
Win 8 64bit Silverstone SST-ST45SF Silverstone RVZ01 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel i5 4590 ASRock B85M-ITX GALAX GTX 970 reference 4GB Adata 4g*2 DDR3 1600 
OSPowerCase
Win 8 64bit Silverstone SST-ST45SF Silverstone RVZ01 
  hide details  
Reply
post #6 of 6
Quote:
Originally Posted by 95139ieaci View Post

Here is an odd one:
Switching the two 6 pin psu connectors with each other fixed the problem, it seems.
Go figure. And that was before the driver update.

Hmm... That's a bit worrisome. Sounds like your power supply might be having trouble keeping up. I just took a closer look at your specs, and you might really want to consider investing in a more powerful PSU. Official system requirements for the 970 recommend a minimum 500W PSU with 42A on the 12v rail, and I see yours is 450W with 36A on the rail. Sometimes you can get by fine with less than the recommended, but when there's not enough power all sorts of random problems like this start happening.
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