GPU upgrade advice please

Hi all,

I was recently gifted a Dell XPS 8300 i7 2600 12Gb RAM/240SSD/1Tb HD base unit, with a GTX560Ti GPU in it, but although I don't game much (the occasional game of ETS2/ATS), I've noticed that the GPU loses synch with my monitor (Dell P2219H), whether using HDMI or Display Port, when the GPU's under load.
Although this is very intermittent at the moment, I do think that sooner or later, the GPU will fail totally, so I'm looking into alternatives.

I understand that the machine is 9 years old (1st Gen core i7), but it runs perfectly well, aside from the GPU issues.

I'm looking at perhaps a GT1030 2Gb card - Would this be enough of an upgrade to run the games above, or can you suggest something else?

Thanks in advance.

@Mods - Can you please delete this post, as I posted it in the wrong section and am unable to delete/edit it myself, due to timeouts.

Thanks.