Question about Seasonic Prime TX

It is not an ATX 3.0 power supply. But the question is, what do you expect from ATX 3.0?
It definitely has the new graphics card connector (12VHPWR) so that you can power an NVIDIA 4090, for example.
I have the 1300 because my maximum load is between 600-700W and efficiency is best in that range.
Have never experienced any power spikes that shut down the system. Again, think ATX 3.0 is just hype that costs money but doesn't really benefit the consumer.

It's not :(

It really doesn't matter what specification it has; this is pure advertising to rip off customers. Features = money, the more good reasons you can find to make something expensive the better.

The only thing that is important is that the PSU (power supply unit) can operate the modules used there, where ONLY the GPU (i.e. the graphics card) could have critical power requirements (everything else underloads almost every PSU that is not the latest scrap) absolutely safely, according to the manufacturer. If the manufacturer states that this PSU can safely supply e.g. 600 W on 12VHPWR, then depending on the manufacturer, this should be... If the manufacturer is not a liar (which may be the case), then this will generally be true. For this, the PSU must already meet certain high requirements.

However, as far as the Prime TX is concerned, i.e. this "titanium PSU" from Seasonic: it has so much steam that it could even safely run TWO 4090 TI (which are not even out yet) without this PSU starting to smoke. It is so powerful that there are only a handful of other PSUs that can match it. The TX 1300 PSU only reaches its absolute load limit at around 1600 W, although it is declared as 1300 W and the rails can withstand just about anything. The TX 1600 power supply is effectively only at the absolute load limit from about 1800 W, and if that happens, it simply switches off... so nothing goes up. Whereas I have never seen anyone ever overload a Seasonic TX (Titanium series)... unless it was done synthetically (under lab conditions, without real hardware loads). There is really only one series, Corsair's Oberlasse... which has the same collateral as Seasonic's TX, all other PSUs, no matter what they are all called.... see no light there. Because these are the hypercars among the PSUs, if you want to compare them like that. Corsair is a little more innovative in terms of design, while Seasonic relies more on the tried and tested; however, both manufacturers are unbeatable in this area.

The only critical thing is that the 12VHPWR plug is inserted WELL, SOLIDLY and STRAIGHTLY and that this plug NEVER bends or "tilts" sideways during operation, because then there is too much resistance and these contacts can heat up so much that this area starts to smoke and burns out. It doesn't matter how good the PSU is, because up to 600 W over such a "small line" is a big challenge, purely in terms of the plug. As a technician, I would have solved it differently, but that's the status quo... so ALWAYS make sure that EVERYTHING is connected properly and that the PSU has enough steam (we don't need to talk about this with the TX, they have plenty of steam),