graphic card issue Nvidia geforce 512mb with Sierra

I purchased MacBook Pro mid 2010 15 inch with icore7, Nvidia geforce 512mb and 500gb hd and 4 ram; after almost 7 years HD started crushing and I was advised by apple geniuses to exchanged, but unfortunately they not fixing computer older than 5 years, so I went to the other service.

They put new HD 1 tetra and added 8gd when I look at my Mac window it shows INTEL GRAPHIC CARD 288mb ???

what is going on here???

I used for last year El Capitan and before that I was running all the time on Leopard back from 2010, without any issue operating photoshop CC from 2014...

is it any problem with SIERRA that it is decreasing ability of graphic card???

recently Im using photoshop CS6 and it was quitting unexpectedly few times after I saved some files???

what is going on here???

is it Sierra problem or the service removed my logic board and replaced with the worse graphic card???

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This model has an integrated graphics chip inside the CPU (Intel) and discrete graphics chip (Nvidia). With the crashing issue, this will be related to C9560 on the logic board; commonly fails and causes fluctuation of the GPU voltage. Usually crashes when using programs like Photoshop and Chrome.

If you have tools and experience microsoldering, grab a schematic and board view for your model and replace this capacitor with a polymer one, which won't fail like the original tantalum one. If you do not have the tools, send your MacBook to someone who is aware of this particular issue and can fix it (not Apple or an authorised service centre).

If you say your MacBook Pro 15 2010 is crashing, any knowledgeable Mac repairer will be able to tell you exactly what is required, as I have done

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Magdalena Marciniec will be eternally grateful.
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