Most likely that PC will have room for a couple of PCIe expansion cards, and the PSU at 460w should be able to support anything up to probably GTX1050 ti.
The PCIe slots should support most PCIe video cards. Compatibility would depend on power draw, and version of PCIe slots. Based on the Mobo diagram/chipset it has PCIe version 2 slots:
https://www.dell.com/community/Deskt...n/td-p/4040381
The GTX 1050 TI draws only about 75W at full blast, this can even be lowered with tuning (MSI Afterburner software).
Any PCI Express slot on the motherboard can provide "up to" 75 watts, total draw for all PCIe slots (v2 or v3) is like 300w. I would still try to look if the particular card you choose requires an extra 4/6 PIN PCIe power connector, in addition to the PCIe bus. This may not be provided by the PSU, so you may need an adapter cable if the card requires it.
I wouldn't go any bigger than 1050 ti (or GTX 1650), that's about the limit as bigger models are more power-hungry.
By the way, the GTX 1650 is newer generation/faster than 1050 ti with the same power requirements and in the same price range I believe.
I would stay away from any "OC" / Overclocked version of those graphics cards, as they run hot and are more power-hungry.
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