Author Topic: Nvidia GTX 780 schematic / component ID  (Read 547 times)

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Offline ricendres

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Nvidia GTX 780 schematic / component ID
« on: April 12, 2020, 07:21:55 pm »
Hello, recently there was a tragedy with my video card .... I was cleaning the PC and I dropped it from a small distance. but the board hit the back on a pin of the case and broke 2 smd capacitors and 1 resistor ..
Does anyone know where I get the scheme to find out the values ​​of these components?

photo that was broken


red circle location




I really need help, because at the moment it is complicated to buy a new one. My dad has an electronics and can fix it if he knows the values ​​of the components or if he has the schematic

I found this photo of a similar sign on the internet
« Last Edit: April 14, 2020, 01:44:06 am by ricendres »
 

Offline Manul

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Re: Nvidia GTX 780 schematic / component ID
« Reply #1 on: April 12, 2020, 07:47:23 pm »
Please look and analyze these sections.
 
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Offline ricendres

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Re: Nvidia GTX 780 schematic / component ID
« Reply #2 on: April 13, 2020, 07:48:28 pm »
thanks so much
 

Offline PKTKS

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Re: Nvidia GTX 780 schematic / component ID
« Reply #3 on: April 13, 2020, 07:48:57 pm »
Hello, recently there was a tragedy with my video card .... I was using the PC and I dropped it from a small distance. but the board hit the back on a pin of the case and broke 2 smd capacitors and 1 resistor ..
Does anyone know where I get the scheme to find out the values ​​of these components?


Schemas for video cards are not easily found probably
if they found one they will prosecute you for life..

It is far cheaper simpler and effective if you just
buy a faulty card and they are very similar regarding brand
and GPU models

Or even buy a wholesale of them - very common
for spare parts

Paul
 

Offline M0HZH

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Re: Nvidia GTX 780 schematic / component ID
« Reply #4 on: April 14, 2020, 12:27:57 am »
The schematics are not public.

Those resistors and capacitors are associated with the GDDR5 memory chips on the other side of the PCB. That card is using 12 memory chips and each has the same parts (a few resistors and a few capacitors) associated with it. The PCB layout usually is repeated for the positioning of these chips, so there are other areas on the board with the same parts and same positioning. I've circled in blue the areas that look similar, you just need to look at those, measure the resistors and capacitors and order same value replacements.

My guess is the resistors are differential CK bus terminations and they should all be the same value (240 ohm / 120ohm / 60ohm depending on the arrangement). Capacitors are probably decoupling, something like 10nF MLCC.
 

Offline ricendres

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Re: Nvidia GTX 780 schematic / component ID
« Reply #5 on: April 14, 2020, 01:46:26 am »
Thank you very much for all these tips. I believe that with all this information we can recover my video card
 

Offline gorge441

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Re: Nvidia GTX 780 schematic / component ID
« Reply #6 on: April 16, 2020, 04:58:47 pm »
Please buy a new one.
 

Offline ricendres

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Re: Nvidia GTX 780 schematic / component ID
« Reply #7 on: April 18, 2020, 12:53:58 am »
Unfortunately my situation is financially complicated in the last few months and I will not be able to buy another one.
 

Offline Manul

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Re: Nvidia GTX 780 schematic / component ID
« Reply #8 on: April 18, 2020, 01:24:55 am »
ricendres, do not feel bad about someone's useless comment. How the repair going?
 
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Offline ricendres

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Re: Nvidia GTX 780 schematic / component ID
« Reply #9 on: April 18, 2020, 01:35:18 am »
Not yet, I'm looking for compatible components,
thank you for your help
 

Offline TiN

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Re: Nvidia GTX 780 schematic / component ID
« Reply #10 on: April 18, 2020, 06:28:50 pm »
Upmost right cap is 1 uF, then right bottom broken part is 121 ohm 1% resistor and left broken cap is 10 nF. All parts are 0402 size, you can buy them from Digikey/Mouser/etc.

You can ignore 1 uF capacitor, it's just for filtering power, but resistor and 10 nF one are kinda important.
« Last Edit: April 18, 2020, 06:30:57 pm by TiN »
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