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What's wrong with my 8800GT ?

post #1 of 21
Thread Starter 
Hi guys,

My GPU is acting rather strange lately and I hope you guys can help me find an explanation for this.

First I'll start off what's going on. I recently succesfully voltmodded my card.
I pushed 1,3V through it and overclocked to 725/1812/975.
I did decide to clock it back to defaults and set the voltage back to 1,15V because I'm gonna SLi. Anyway I did the Ati tool artifact scan and it came up with a artifacts at stock speeds.
I really don't get that... why would I get artifacts at stock voltage and speeds?

The only thing I could actually think of is that it might be my PSU.
It's a X-Gear 400W (aka crap?) with only 16A on the +12V line. Could it be my GPU doesn't get enough power and that's the reason it acts so weird?

I played a few rounds CSS and Tiberium Wars, but they work fine. Also Portal completely maxed out worked good (I would think that would stress the GPU quite well).

BTW.. That PSU is powering the system you see in my sig.

Thanks in advance
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post #2 of 21
Quote:
Originally Posted by Unstoppable View Post
Hi guys,

My GPU is acting rather strange lately and I hope you guys can help me find an explanation for this.

First I'll start off what's going on. I recently succesfully voltmodded my card.
I pushed 1,3V through it and overclocked to 725/1812/975.
I did decide to clock it back to defaults and set the voltage back to 1,15V because I'm gonna SLi. Anyway I did the Ati tool artifact scan and it came up with a artifacts at stock speeds.
I really don't get that... why would I get artifacts at stock voltage and speeds?

The only thing I could actually think of is that it might be my PSU.
It's a X-Gear 400W (aka crap?) with only 16A on the +12V line. Could it be my GPU doesn't get enough power and that's the reason it acts so weird?

I played a few rounds CSS and Tiberium Wars, but they work fine. Also Portal completely maxed out worked good (I would think that would stress the GPU quite well).

BTW.. That PSU is powering the system you see in my sig.

Thanks in advance
The card may well be on its way out. So you dont get any artifacting o outside of ATi Tool right? Do you have any more graphically demanding games you can try like crysis (or even the crysis demo would work to test with)?
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post #3 of 21
Thread Starter 
Yeah I'll install Crysis and check it out.
BTW.. On 3dMark06 is still get between 12k and 13k (forgot the exact number)

What do you mean by on its way out?

Edit: Maybe also handy to know, if I run the card at 1,25 to 1,3V it will run artifact free @ 725/1812/975

Installed and patched to 1.2, now playing
Edited by Unstoppable - 6/17/08 at 2:19am
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post #4 of 21
Quote:
Originally Posted by Unstoppable View Post
Yeah I'll install Crysis and check it out.
BTW.. On 3dMark06 is still get between 12k and 13k (forgot the exact number)

What do you mean by on its way out?

Edit: Maybe also handy to know, if I run the card at 1,25 to 1,3V it will run artifact free @ 725/1812/975

Installing...
I mean the card may be dying. I also forgot to ask in my first post: What are your temps like when the card is under load?
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post #5 of 21
Thread Starter 
At the moment while playing it's at 60C to 63C (it always runs like this, even when I first bought this card) All settings high and no AA.
Running now for half an hour with no problems yet and running smooth.

But why would it be dying then?
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post #6 of 21
Quote:
Originally Posted by Unstoppable View Post
At the moment while playing it's at 60C to 63C (it always runs like this, even when I first bought this card) All settings high and no AA.
Running now for half an hour with no problems yet and running smooth.

But why would it be dying then?
It may not be dying at all that was just an idea. What are your PSU voltages like (especially the 12v rail) and do they fluctuate or are they pretty steady?
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post #7 of 21
I might be wrong, but maybe you shouldn't trust ATI tool in this case... I think that the software is suspect if all your games are running fine. Maybe it was one of those one time random (anomalous) events that happens every now and again with computer hardware. I wouldn't worry about it until your games start becoming unplayable or artifacts start showing up regularly in your games.

Just my 2cents

::crosses his fingers that your card isn't broken::
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post #8 of 21
After doing a little searching I came across a couple of posts in another forum mentioning that 1.3v was too high a voltage for the 8800GT. I have no idea whether or not that is true. However, if it is that may have damaged your card. I would still like some info on your PSU voltages though as that could be the culprit as well.
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post #9 of 21
Thread Starter 
I've been playing Crysis now for more than an hour and no problems.
Here are my PSU's specs:
+5V line = 25A
+3,3V line = 20A
+12V line = 16A
400W

I have been measuring the Vgpu of my card and that one fluctuates pretty much. Atleast it's not steady. This also counts for the Vcore of the CPU btw.

The voltages itself on the PSU itself, well the +12V line fluctuate as well.
I'll have to use speedfan or something to go into more details.

It has been running at 1,3V for not that long. I usually keep it at 1,2V and 1,25V, which should be considered safe.

EDIT:
Lol seriously this is really weird xD
According to both Everest and SpeedFan, the voltage on my +12V line is 3,26V to 3,33V !
The -12V line is at -16,97V
Edited by Unstoppable - 6/17/08 at 3:45am
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post #10 of 21
I would definitely get a better PSU (corsair, silverstone, etc.) especially if you plan to SLI. If you are playing crysis fine, forget ATItool.
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