today it's excess, but in 5 years it will be on point or close to it. OP asked upgrade path to play without changing anything for as long as 400-500€ can afford (+eventualy a psu if necessary, which, for a piece that can last a decade, is not a bad idea)
i will never play those modern games tested by forum, most are shooters which i deslike... im into skyrim, the elder scrolls, enshrouded type of survival farming open world discovery more slow paced peaceful games LOL --- i will upgrade my psu to 750 or 850 with 100~130€ ive kept alongside 400 for gpu is my 550w not enough
If in five years he's playing something current gen at ultra settings, as TPU tests, then he'd still be getting over 85 FPS 1% lows, with 105 FPS average.
If he's playing something newer, he can use DLSS 3.0 frame generation, which is superior to the AMD option, since he's only playing singleplayer games anyway. Then even if his FPS drops to half what it is now, he's still getting more than 40 FPS minimum, and 50 FPS average at
ultra settings. Without upscaling, just frame generation, that's exactly the same performance he would get today, if he did play current games at Ultra. I.e. minimum low FPS 25 above his monitor refresh rate.
Instead of buying a four year old
used GPU, that will be nine years old in five years time, and having to spend even more of his budget on a new PSU too (
why are we even having this discussion, OP has clearly stated he does not want to buy a used GPU). Or buying a ~7700XT (for €150 more in total, €50 GPU + €100 PSU), having to suffer with substandard upscalers/no DLAA, poor RT support (since we're on the topic of "in five years time"), and poor energy efficiency on top of
still having to buy a new PSU, because both the 3080 and 7700XT require a 650 W PSU
at minimum compared to the 4060 Ti 350 W minimum recommended, which OP already comfortably exceeds with his 550 W Seasonic unit.
Get a 4060 Ti 8/16 GB, or a 4070.
There's no other 1080p60 intelligent choice buying new with a <€600 budget and a 550 W PSU.
Especially considering OP only plays old games as he has clearly stated many times.
Oh, and that €150 premium for the 7700XT gets you - 12 GB of VRAM, and 13% better raster performance at 1080p vs the 4060 Ti.
Not worth it.
Spend €50 more for the 16 GB 4060 Ti if the VRAM really matters, which, for 1080p60, is only the case for heavily modded games.
Or €200 more for the 4070. But it's completely unnecessary as has been pointed out previously. Any current gen card has enough power to drive the games he plays at the resolution/Hz he does. Better to save the money for other things.