hi. my motherboard is a dell optiplex 390 with i3 2130, can the nitro rx 470 work with it?
That depends on a few factors:
Judging by some images on the internet your motherboard does have a PCI-E slot available. I can't say anything about the powersupply and the connector though, you'll have to look for yourself. Alternatively you can consider the RX 460, some variants like this Sapphire one do not require an additional power connector but are powered from just the slot.
and this appears everytime i want to use something
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