What is the practical difference among same-wattage PC power supplies?
I have a three-year-old PC with a Corsair AX760i 760W power supply. It was a premium model at the time (2015), costing $183.
I left the PC plugged-in, but shut down, for a couple of days. When I returned and powered it up, the machine died after about 10 minutes of use, as suddenly as if there had been a power failure. After that, it wouldn’t start at all, seeming to start up and then shut down repeatedly at 1-2 second intervals. I left it unplugged overnight and the machine booted up and ran just fine all day.
I am thinking that it is time for a new power supply. In theory this thing has a warranty, but how can I live without it for days? Maybe they offer advance replacement? But how do they know it is actually broken and it isn’t something else shutting down the PC?
[Readers: Anyone have an idea for what could be wrong other than the power supply?]
Let’s assume that it is in fact time for a new power supply. The same company, Corsair, makes multiple 750-watt model: Bronze ($80), Gold ($130), and Platinum ($180). What is the conceivable practical difference among these? Will it be fan noise? They all claim to be quiet at idle, which is where my PC lives 99 percent of the time (Adobe Premiere compressing videos is my only heavy load). The high-end ones are slightly more efficient? But who cares if the PC is seldom under high load?
Thanks in advance for brilliant insights!
[Separately, I can’t see anything about today’s PCs that is significantly better than what I purchased three years ago (for a little over $2,000). The consumer (non-Xeon) motherboard in my desktop holds up to 128 GB of RAM (32 GB currently populated). Most of what’s in the market today seems to max out at 32 GB or maybe 64 GB. How is it that so many brilliant engineering minds can’t make something that inspires trade-ins?]
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