So it's September 2022 now, how did this upgrade go?

[NonSequitur777]

@Blythespirit,

Well, according to Nvidia, yes: https://www.nvidia.com/en-me/geforce/graphics-cards/rtx-2060/ (needs one 8-pin PCIe power cable):

Another very nice graphics card option which has a 450-watt power supply minimum requirement, would be the Gigabyte GeForce GTX 1660 OC 6GB, as seen here (needs one 8-pin PCIe power cable): Amazon.com: Gigabyte Gv-N1660OC-6GD GeForce GTX 1660 OC 6G Graphics Card, 2X Windforce Fans, 6GB 192....

Check out its specs: GeForce® GTX 1660 OC 6G Specification | Graphics Card - GIGABYTE Global

Hope this was helpful.

Kind Regards,

NonSequitur777

[Prométhée]

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@Blythespirit wrote:

'With your 500 watt power supply (AND an i7-7700 processor AND upgraded RAM) you can do a heck of a lot better such as with a GeForce RTX 2060 6GB GDDR6."

Will the PSU be able to handle a 2060?, I'm a bit dubious.

Also, what would be the most powerful GPU i could put in that system and be confident of it's reliability?

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you won't be able to be certain of the reliability of anything..
But do you really need something much more powerful, does it play games for example that need a very powerful graphics card, maybe not..
But if not, you have a table here, which gives examples, you can find others

RECOMMENDED_PSU_TABLE-2.pdf 

https://support.lumion.com/hc/en-us/articles/360003476773-Which-power-supply-do-you-need-

Nvidia, specifies that the power of the power supply can vary according to the configuration

And so you have to check this directly with the manufacturer.

https://us.msi.com/Graphics-Card/GeForce-RTX-2060-VENTUS-GP-12G-OC/Specification

8-pin x1 / 6-pin x1

https://us.msi.com/Graphics-Card/GeForce-RTX-2060-VENTUS-12G-OC/Specification

8-pin x 1

https://www.gigabyte.com/Graphics-Card/500-W

https://www.gigabyte.com/Graphics-Card/All-Series?fid=2401