That much wattage should be a concern. Firstly, the closer you get to the peak rated output of your PSU, the less efficient that PSU is going to be, meaning your power usage is going to go up even higher than the wattage increase alone, but it's also going to reduce the lifespan of your PSU... and a PSU frying on you can cause damage to other parts of your system... I can fry up your motherboard, your CPU, probably even that expensive AF GPU.
Secondly, the cost of that wattage is going up exponentially. I tried to tell people those $1,200 checks were going to cost them more than $1,200 a year or two down the road, and with inflation due in large part to the printing of large sums of money over the past couple years, I think people have already spent way more in higher prices for other stuff than what that provided, and those prices don't look like they'll be stabilizing any time soon. 600+ watts is going to become rather expensive.
Then you also have to consider the additional cooling you're going to need for that. Most peoples builds struggle to cool existing hardware making their PCs sound like jet engines when they play something, and quite often that includes people who have a significant amount of cooling performance, like large CPU coolers, massive fans, liquid cooling, etc, and that still struggles. A 600 watt GPU is guaranteed to require even more cooling than that, or you're going to end up with a lot of throttling, rendering the whole upgrade moot anyway.
Another issue is we're already well past the point of diminishing returns when it comes to graphics, so much so hardware manufacturers are trying to hype up technologies that don't even provide much to gaming itself. Go back 10 years ago, hell 14 years ago to stuff like the Mass Effect games, which still look great today, go back 5 years before that and stuff begins to look noticeably worse. Spending an ass load of money not only in the GPU but the power to drive it is only going to yield miniscule noticeable improvements since we've pretty much already tapped out what the human eye can see in terms of resolution, frame rates, and ray tracing doesn't achieve much more than rasterized shaders at a significant cost to frame rate proving little more than an easier workload to developers.
If you want to be that much of a graphics whore to pay thousands of dollars for small improvements, go for it... but isn't it about time we start demanding games with better gameplay, better story, and stop being sold shit based on small improvements in graphics?
If AMD put out an APU with a similar amount of focus on graphics as the APUs they made for the PS5 and XSX, I'd be fine with that in a gaming PC. The only reason APUs have been fairly lackluster in performance up to this point is purely by design, so not to take away sales from their more expensive cards.
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