Yes, different models from different AIBs can consume a little bit more in exchange for hopefully a bit more performance. Especially ones branded as OC models (factory overclocked).

550w PSU should be enough. It would randomly shut your PC if it wasn’t enough.

Normal. But if you really care about that you can set a power limit in something like MSI Afterburner.

Yeah, as people mentioned above alot of cards are factory overclocked and some even have higher powerlimits. As an example my old ROG STRIX GTX 1070 ran at nearly 210w when a normal 1070 is 150w, because the rog strix model had a 140% power limit, compared to most that are only 100%.

Also if you are worried about it, you could always set it to less then 100% though i don't think you should since you aren't getting random shutdowns. 550w is on the lower side for a PSU but it's fine for your system. even if you had all the drive slots,fan headers populated + tons of RGB you'd still be pretty far off 550w at full load. that said going any higher end when you upgrade may warrant a PSU upgrade, as the 70 and 80 class cards draw alot more power, same with CPU's (especially on intel)

partner cards can run over spec do to overclocks......its not a issue given in almost all of these cases the GPU heat sink is bigger then the stock options.....

only worry about it if the GPU goes over 75C under full load.....

the tgp of this card is 180w. even with the tdp only 150w
your are thus drawing the maximum the card can draw..

the standard model tends to draw 160w.. but many manufacturers sell cards at slighter higher mhz which logically means the powerdraw will also be somewhat higher.
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it is also possible you may have drawn unfortunate in the silicon valley and the card needs this to basicly make up for being slighly more leaky.. (the analog would be if you pump water at a higher volume trough a leaky pipe.. still enough makes it to the other side)


the voltage is not to worry here it just means it basicly draws all it possible can and that wattage is the limiting factor here..
which if your gaming aka full load could happen (it be a bit odd it it would be fixed 180w though and never dips a little below that... usually you see max load only at spikes..