Are they just putting the GPU chip onto the motherboard? I mean I've opened up a PS3 once to extract a game disc and well, its not like they had a graphics card as I would know them. I just assumed its all put into the motherboard, memory and all.
The chip in the new Sony and Microsoft consoles, as well as the existing consoles and Zen 2 CPUs for PC, uses what AMD calls an APU, Accelerated Processing Unit, basically a CPU and GPU on a single die. Kind of like a CPU with integrated graphics, except the GPU part of an APU is a fair bit beefier than what is normally considered integrated graphics (tho generally not as powerful as an actual discrete GPU). Tho in the case of the PS5 and XSX APU, they've been given specs that match those of discrete GPUs, or even slightly exceed all but the highest end in the case of the XSX APU. Tho actual performance depends on a lot more than just technical specs. For example, heat management has always been a major factor in consoles and while both seem to have taken steps to remedy this, I suspect it'll still play a role.
Durability was an issue as well. A friend and I split the cost and bought one. We played through halo on it, we both played through MGS2 on it. Then my friend bought KOTOR, got a little ways into it... and it bricked. So it was only good for 2 and 1/3 games before breaking down. A valuable lesson in only buying quality products. PS2's were far more durable (I still have a working one, although I've worn out a couple.) And my original Gamecube and Dreamcast still work. Basically, I only think of the original Xbox (and the Xbox 360 as well) as those badly made pieces of junk that wound up as expensive paperweights after a couple of months.
Iirc, that had to do with the
Capacitor Plague. Basically, tons of capacitors produced during the early 2000's were faulty, resulting in a lot of computer hardware bricking. This affected all the consoles to some degree, but the original Xbox got the worst of it. Didn't help that MS cheaped out either. In most cases, it was actually a single specific capacitor (the one that kept the internal clock going) that broke, spilling corrosive fluid all over the motherboard. A late hardware revisions fixed this problem, but I would advise anyone with an OG Xbox to open it up for a check and remove/replace it if there. It will go bust eventually, taking the rest of the console with it. There's step-by-guides for the process online.