Is it bad to get a bigger power supply than you need?

No, there’s not any disadvantage of having a bigger psu than needed. It would do you only good. Psu will only draw power as much as it needs it may be a 550watt psu supplying full 500w to your machine or it may be a 1000w psu supplying only 550w power to your pc, giving you a lot of headroom to oc or sli/cf.

Can I put a bigger power supply in my computer?

Bottom line: It’s perfectly fine to use a power supply that’s “stronger” than the one it replaces. Just don’t use one that’s “weaker” (i.e. has a lower wattage rating).

Is too much power supply bad for your PC?

The PSU itself will only draw the power it needs anyway, so it wont hurt anything being much more than you need. The main downside will be the lower power requirement translating into losing efficiency of the unit, basically it will cost a few pennies more to run.

Can your power supply be too big?

No such thing as a “too big” power supply. It’s like a big engine… It needs to be big enough to pull the load, and if it’s bigger than that, no big deal. It’s not efficient, but it’s not going to cause functional problems.

Is a 300w power supply enough?

300 watts is enough if it’s a single rail PSU and the system has an overall low power design aside from the components mentioned. Most people never upgrade their computer in a way that significantly increases the power requirements, so the system you linked to may do perfectly well for you.

Is 850w overkill for 3080?

Yes, it’s enough, but it might not be ideal. An RTX 3080 uses up to around 370W under peak load, and a Ryzen 9 5900X uses up to around 150W under peak load.

Is 800 watt power supply too much?

There is no such thing as too much wattage (well, when it comes to computer power supplies anyway). Your power supply will supply however much power your computer needs until it reaches its limit. You could have a 20,000 watt power supply in a computer than only requires 200 watts and it would be perfectly fine.