Artifacts on DX11 and a weird solution.

[papipalmito]

hi guys let me tell my history

i bought a 5850 about year and a half ago and this card have a problem with the tessellation engine.

For example when i run the heaven benchmark with the Tessellation enabled the benchmark shows severe artifacts like the following video :

http://www.youtube.com/watch?v=e5VGkvZcbTk&feature=related

this its no a video of mine, but is the same problem that i have but the benchmark has no problem in DX10 mode or DX11 with tessellation disabled. The card have the default clocks and has not been tweaked in anyway(BIOS etc)

With other games the problem persist, games like dirt2 metro 2033 but not so severe like the heaven benchmark.

Now the problem is in the VGA thats 100% sure. I said this because a friend of mine have a 5770 and i tested in my computer and has no problem and my friend tested my VGA in his computer and the artifacts are still showing up.

but then the miracle happen... i installed the 3dmark 11 benchmark and after like 4 loops of test the artifacts gone away and the games, the heaven benchmark now runs flawlessly in dx11 mode with tessellation enabled but when i reboot my PC and run dx11 games or the heaven benchmark the artifacts appear again and in order to get rid of them i have to run the 3dmark 11 benchmark like 4-5 even 7 times which its take a long time.

so... what do you think its happen here? opinions? obviously the 3dmark benchmark do something that fix my Vga temporally.

BTW english its not my native language. I apologize for any misspelled word or grammar mistakes.

Greetings from Chile !

 

[enaher]

Hola hermano latino xD
Well most likely it fixed a driver issue, and less likely heat produced by running 3d Mark fixed some solderpoint.

 

[LordJummy]

That card is dead methinks. You should RMA/Return it to retailer, whichever is more convenient. Probably RMA because it's been 1.5 years. How long has it been doing this? Since you first got it?

If it's been doing this since day one I have to ask: why didn't you return it?

 

[papipalmito]

That card is dead methinks. You should RMA/Return it to retailer, whichever is more convenient. Probably RMA because it's been 1.5 years. How long has it been doing this? Since you first got it?

If it's been doing this since day one I have to ask: why didn't you return it?

Because it bought in the US in a travel. After that i returned to my original country therefore is kinda impossible RMA it

 

[cadaveca]

so... what do you think its happen here? opinions?

I think that the thermal paste over the GPU where the tesselation engines were was not making good ocntact, and successive thermal cycles allowed it to settle properly.

you could try re-pasting the GPU. Other than that, RMA sound like the best option; it is unfortunate you cannot.

 

[brandonwh64]

I would reapply thermal paste as dave has mentioned then try different drivers.

 

[Black Panther]

successive thermal cycles allowed it to settle properly.

But when he reboots the problem starts afresh (or I didn't understand him properly)?

I'm pretty sure it's something to do with warmth. Like a cold bug or something. Very often artifacts occur with insufficient vram cooling rather than gpu cooling.

 

[cadaveca]

It depends on the paste, and what it's base is. If it's an oil-base, the oil could contract and solidify when cooled, and when it warms, the oil flows again.

Again, it's a stretch, but what else can he do?

Could be a coldbug, for sure..I had enough 5-series cards with that problem myself.

 

[papipalmito]

thanks for the replys guys !

For example right now the artifacts are gone.(after like 5 3dmark 11 loops) but if i reboot or put the pc to sleep, even for 1 minute the problem appears again.
this thing its so weird but at least its a solution

 

[D4S4]

hm... BAKE IT.

 

[cadaveca]

hm... BAKE IT.

Hmmm. good tohught. Could be a cold solder joint.