Underpowered PSU for GPU. What to do?

[BigFoot96]

Hi,

Trying to help out child of a friend. They know little about PC's and although I know more I'm out of my comfort zone on this one.

In the autumn they bought an Intel i7 PC in a small form factor. But for Christmas the boy was given a GTX 4060 without anyone having much confidence in installing the thing.
This is where I came in. On installation I noticed the PSU didn't have an 8 pin power connector which led me to check the specs.

The box has a 300W PSU, and a quick internet search tells me the box might be underpowered for the GTX 4060.

So what do to?

How can I find out if it will be okay to buy an adapter for the PSU so the 4060 can be installed? or,
what other conclusion can be drawn?
There's nothing else installed on the motherboard apart from CPU and a 500GB SSD.

Thanks for any help.

 

[BigFoot96]

Thanks for the quick reply.
Believe it's a UK built Xenta with the following box dimensions (WxHxD) 308x171x360mm.
I have always bought ATX, so wouldn't recognise the MicroAtx.
Motherboard only has one expansion slot if that helps.
Didn't inspect if PSU was replaceable.

What would happen if 4060 was fitted and he started playing games?
Would it blow up, and if so, which part?

 

[BigFoot96]

Thanks a lot guys! Very helpful.
I now have something to go back to the dad/son with.
Cheers.