Will this GPU be ok (China repo) gtx960

https://www.ebay.co.uk/itm/GTX-960-4GB-G...2608074281

GEFORCE GTX 960

This GPU looks like one of those China Repo's



Its a 4gb also (supposed to be)

But the originals are only 2gb

https://www.geforce.co.uk/hardware/deskt...ifications

is there any benefit of a 4gb over a 2gb 



Has anybody had any experience with these.

Should i expect any issues from this

Or are they just as good as the Original..



My pc is a 4gb also (recently found this out, its not 2gb after all)

3.4Ghz

And my 460watt Power is suitable for this

So i should be ok right..

Is there anything i should be making sure of before purchasing.



Thanks for any info.