Will the old palit gtx 550 ti work on the new MSI MPG Z390 Gaming Pro Carbon motherboard?

Question

Iron

In general, the problem is, I assembled a new PC, but there was not enough money for vidyuhu.
A friend has an unnecessary vidyuha Palit GTX 550 ti, she is 7 years old but works fine.
I think while I'll save some money for a new video card, get by with this one.
Here's what I assembled my new PC from - MSI MPG Z390 Gaming Pro Carbon, i7 9700. PSU GIGABYTE GP-G750H 750W ATX Gold.
Vobschem question. Will I be able to use an old Palit GTX 550 ti with the one I bought?
Could the old vidyuha somehow harm my new hardware?
On my new motherboard there are PCI-E 3.0 slots, and on the vidyuhi PCI-E 2.1 x16.
Also, there are 6 + 2 slots on the power supply, and on the vidyuhi for connecting power, a 6-pin port

Answer 1

Yes, it will work, because connectors are the same. But I don’t see the point in buying such expensive components so as not to use them to their full potential, because there wasn’t enough money, it would be better to save up and buy everything at once, and enjoy it. And so the performance of your PC will rest on the power of the video card. And so everything will work fine, you can put