How much does this 270X cost? An R9 270X should offer performance roughly comparable to a GTX 1050 as far as current-generation cards go, and those can be found new for around $110 USD online, so I wouldn't pay more than that for one. Plus, a 1050, being newer, only requires around 70 watts under load to provide that performance, while a 270X requires upward of 120 watts, resulting in more heat and potentially more noise produced by the card. A 1050 Ti will provide even better performance and also includes 4GB of VRAM which can help performance in newer games, and those can be found starting around $155 now.
Due to the current graphics card shortage caused by cryptocurrency mining, I wouldn't buy anything higher than 1050 Ti right now. While the previous poster's suggestion for an RX 470 would have been good a few months back, they've been sold out at pretty much all retailers for a while now, and any RX 470s, 480s, 570s and 580s you might find will likely be marked up to around double their normal cost. GTX 1060s and 1070s are also in short supply and marked up quite a bit, so they're not a very good option at the moment either.
If the 270X is priced lower than a GTX 1050, it might be worth buying, otherwise I wouldn't bother with it and would go with something newer.