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Old 12-25-05, 09:08 PM   #13
jpick324
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Default Re: 6600 GT OC problem

Hi, I'm new to this site, but I actually just had around the same problem today. I have a BFG 6600 GTOC and a 300W(stock) PSU. Worked fine until I got a new soundcard, Creative X-Fi Xtrememusic, and after I installed it I was getting artifacts all over Battlefield 2. So I checked the temp and it was 78C. Normally its about 68C after heavy Battlefield 2 play. So i thought maybe it was because I had the soundcard directly underneath the graphics card. I moved the sound card to the next PCI slot and put the modem where under the graphics card. Then I was playing a game and the computer shut off. Nothing would happen, tried unplugging and hooking everything back up and still nothing. When I hit the power button, the fans go for a couple seconds and the grahpics card light lights up then stops. Took the graphics card out, then no problem, everything worked fine.
PS, sorry for the long post, but I figured the more details the better
Thanks a lot!
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Old 12-25-05, 09:38 PM   #14
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Default Re: 6600 GT OC problem

The card is defective and/or damaged. I've seen this before in both my own and other peope's cards.

http://www.nvnews.net/vbulletin/showthread.php?t=59004&

I just got around to sending mine in for RMA two weeks ago. It's due to arrive here on the 27th on account of the holidays.
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Old 12-25-05, 10:00 PM   #15
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Default Re: 6600 GT OC problem

What could have damaged the card?
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Old 12-25-05, 10:31 PM   #16
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Default Re: 6600 GT OC problem

It is the GPU core itself that is damaged. Notice that 2D apps work fine but any application that uses the 3D functions (e.g. direct3d or opengl apps) of the card exhibit this "pixelation." I am guessing that the windows media center application is somehow 3D accelerated or else it wouldn't be doing this.

In my case I am 99.9% certain that this was caused by an overheat. If an integrated circuit overheats, you can run into all sorts of issues. All it takes is for just one of the transistors to cook just enough so that its chemical composition changes so that it is no longer conductive, and then you're screwed.

If you run the card in a relatively warm room for a long time, while running a highly GPU intensive game, even if it isn't overclocked or if you aren't using a custom cooling solution, it is possible for the thing to burn - no matter what brand it is. Theres a law of physics that applies here somewhere.

At the time I was doing this, my room was pretty warm (~95F), which meant the area around the computer was even warmer, and I was playing quake4. I had a sudden reboot, and after that the GPU just didn't work right since.

It also pretty much goes without saying that overclocking your card too much for too long will cause this, as well as improperly installing a non-stock cooling solution.

There is also the chance that the particular GPU you have was just one of the few on the assembly lines that ended up being fabricated poorly, and one or more of the transistors was defective just enough that it wouldn't last as long as it should.
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Old 12-25-05, 11:55 PM   #17
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Default Re: 6600 GT OC problem

Yeah, this sucks, but I have had this card since July and its worked perfectly. You said that 2d programs worked for you, however, nothing works for me, my card fan will start for a split second along with the other fans. Then they stop and the powerlight stays on. Thats why I was wondering if it was a PSU problem. I may buy a new PSU tomorrow and take my card somewhere to have them test it for me. I just want to do whatever it takes not to send it in, good thing for BFG's warrenty! Thanks for the help.
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Old 12-26-05, 02:15 PM   #18
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Default Re: 6600 GT OC problem

Quote:
Originally Posted by Gentle
Please examine the power supply sticker for the "rail" information.

It looks like +3.3v +5v +12v (and some other values) along with the amp value for each one.

Please post that information here.

Gentle

Where exactly can I find out this information? Do I need a program or something?
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Old 12-26-05, 11:49 PM   #19
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Default Re: 6600 GT OC problem

Impruv, you can find this on the side of your power supply.

AlphaWolf_HK, it wasn't the power supply, I'm going to get my card tested tomorrow before I send it out. I really hope it isn't my PCI-Express slot on the motherboard....Thanks!
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Old 12-28-05, 05:33 PM   #20
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Default Re: 6600 GT OC problem

DC output: +5v ---/25A , +12V----/19A
+3.3V---/18A , -12V---/0.8A
+5VSB---/12A

+5V & +3.3V shall not exceed 175V
+5V & +12V shall not exceed 268V

Max output - 300W

Theres the stuff on the power supply sticker gentle...

sry for such a late reply; quite busy...
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Old 12-28-05, 10:02 PM   #21
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Default Re: 6600 GT OC problem

I have just reviewed the box of my graphics card and it says that 'a minimum 350W system power supply, but clearly my system only has 300W; could this be the problem?
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Old 12-29-05, 12:25 AM   #22
jpick324
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Default Re: 6600 GT OC problem

Impruv: I too had a 300w power supply for my BFG 6600 GTOC, and that is what fried mine. I called BFG, didn't tell them I was running a 300w power supply though, and they are going to call me tomorrow to set up an RMA and have me send it in. Also, I'm going to get a new power supply, probably somewhere around 450w to 500w.
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Old 12-30-05, 12:04 AM   #23
Impruv
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Default Re: 6600 GT OC problem

well im not sure if my card is fried...but I sent an email to BFG ; not fone call yet...I told them about the pixelation problem and i'm waiting for a reply...did not tell them about the 300w powersupply either ... i hope all goes well...
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Old 01-03-06, 05:36 PM   #24
jpick324
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Default Re: 6600 GT OC problem

Well, I sent my card in today, hopefully it will be back by the end of the week, I'll post when i receive it.
P.S. BFG has great customer service!
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