pcpartpicker says

[GloriousGamer321]

pcpartpicker says this "The EVGA SuperNOVA GA 550 W 80+ Gold Certified Fully Modular ATX Power Supply length of 150mm is within the Cooler Master MasterBox MB311L ARGB MicroATX Mid Tower Case maximum of 325mm, but exceeds the recommended length of 140mm. Please verify that the connector locations on the power supply will not interfere with the structure of the case."

is this something I should be concerned about

[Dukesilver27-]

Yes, that means the case's PSU space is not big enough for your chosen PSU. You need to make sure that the case has a bit more leeway, maybe by removing the hard drive bays or something. If not, you might be able to put the PSU in the case, but you might not be able to connect any cables to the PSU, or only some cables.

[GloriousGamer321]

28 minutes ago, Dukesilver27- said:

Yes, that means the case's PSU space is not big enough for your chosen PSU. You need to make sure that the case has a bit more leeway, maybe by removing the hard drive bays or something. If not, you might be able to put the PSU in the case, but you might not be able to connect any cables to the PSU, or only some cables.

I won't have any hard drives so I can remove them and they will fit right?

[Dukesilver27-]

2 minutes ago, GloriousGamer321 said:

I won't have any hard drives so I can remove them and they will fit right?

It's not about that, more of whether the hard drive bay is removable, some came with removable bits with screws, some are structural therefore not removable. Check the reviews for your case to be sure.

[GloriousGamer321]

1 hour ago, Dukesilver27- said:

It's not about that, more of whether the hard drive bay is removable, some came with removable bits with screws, some are structural therefore not removable. Check the reviews for your case to be sure.

"Adaptable drive cage: The drive cage is movable, able to shift toward the front to accommodate for PSU space, backwards to provide additional radiator space, or even completely removed"

 

so I'm good right?

[Dukesilver27-]

Yes, you're good.