You cant run 1280x1024 on a modern screen because its 16:9 wideacreen ratio as opposed to your current 4:3 ratio.
You can run
1280x720 (720p)
1920x1080 (1080p)
720p still looks fine on upto a 24inch screen imo
There would actual be a performance benefit at 720p comapred tp 1280x1024 because there is a smaller total pixel count.
That said the 1050ti is capable of full 1080p gaming- & we've all said this - 1080p medium looks better than 720p ultra 99% of the time
Wide-screen ratio also benefits gaming immensely compared to 4:3 that you're running now - you get close to 1/3 extra horizontal viewing.