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Blown Regulator on R9 290X?

Trojan Horse

Trojan Horse

Trojan Horse

Associate
Joined
27 Jul 2012
Posts
1,705
Hi guys,

I think my GPU is buggy. It crashes after 5 mins of furmark and any gaming. I opened it up for the S/N and checked the hardware but I think a capacitator (?) has blown?

I have circled it in yellow, but it seems like the middle prong has had a bad solder job from the factory and has broken off now. Would this cause the errors, even though the other two are still fully solddered on?

6EofeAu.jpg.png


R9 290X
 
With out googleing the part number, you can get these style ic's with that leg missing. They are normally connected internally to the tab at the top whether they have the leg or not (Looking at the image you can see the track from pin 2 connect to the tab under the chip), so you will often find the pad lay out has all 4 pads. Nothing jumps out at me as being blown up either but its a bit hard to tell based of that image.
 
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That part looks fine to me that you circled it never had a middle leg and clearly was never soldered to the solder pad in the middle, but if you keep using furmark it will finally kill your GPU, Furmark is a power virus.

I noticed the PCI-E contacts for the card are a bit dirty looking that go into the motherboard slot.

Have you checked for over heating ? What temps does it hit under load and idle.

It may just need a good clean and new TIM.
 
That pin will be for ground on some models, in this one the ground pad is on the part making contact to the board (where it will be soldered using that tab) to help improve cooling. If it was being directly heatsinked using the tab you would not want to use the heatsink as the ground pin obviously (usually they are isolated anyway in that case with the thermal pad).
 
Never never never run Furmark on a GPU unless you hate the vendor.

Furmark kills more GPUs than even NVidia drivers !!!!
 
Meaker said:
That pin will be for ground on some models, in this one the ground pad is on the part making contact to the board (where it will be soldered using that tab) to help improve cooling. If it was being directly heatsinked using the tab you would not want to use the heatsink as the ground pin obviously (usually they are isolated anyway in that case with the thermal pad).
Click to expand...

Haven't checked but I suspect there is a 3 pin model where the extra pin is the adjust pin but on the fixed output ones not used.
 
fs123 said:
That components is a +5V regulator and is not blown. The middle leg is supposed to be like that.

http://www.datasheetlib.com/datasheet/163364/78d05al-tn3-r_utc-unisonic-technologies-company.html


If you have crashing/freezing then make sure you are not overclocking the gpu or the cpu. What is the gpu temperature when you run a game? If it exceeds 94C then that would cause throttling or even a crash. A weak PSU could also be the problem.
Click to expand...

Temps don't exceed 70c on GPU, or 45C on CPU. Nothings OC'd.

I cleaned the contacts and swapped the PCIE slot and still nothing. In the process of RMAing to GBT now.
 
Just wanted to say the GBT RMA was awesome! On the day they received the GPU they found the issue, fixed it, tested it and got it ready for collection! Not even a god damn week had to go by, fixed within one single day!!! Really am pleased with their service! Especially as I RMA'd without invoice too :)
 
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