Over the course of 2021, I have made the largest upgrade to my workstation that I have made in 11 years, and it has been pretty expensive. I am very very pleased with the performance of this system.
But now I am looking at the power supply.
It is a Coolermaster RS750 supply that my records tell me went into service in this box in September 2010. It is a high efficiency supply (rated 80+ gold back then) running somewhere around 90% efficiency I suppose. At the time, it was well-rated by those who analyze power supplies. Its performance has been flawless.
Over the course of its life, it has always drawn power from a UPS (never plugged directly into the wall), and in various iterations of this workstation got to maybe as much as 75% of its rated capacity in terms of the amount of power draw - and that was at a time when I had 7 hard drives in this box, and 6 of them were SCSI drives.
At the present, it is operating at roughly 15%-20% of its rated capacity to power my current system. It may run a bit higher than that when I have large compiles underway, but I doubt it is ever getting past 30%. At least, I have not observed that.
So.
Should I replace it? On the one hand, flawless performance and no trouble now. Never been overpowered or seriously strained. Well reviewed as a very good quality supply when it was new. Lightly loaded now.
On the other hand, more than 11 years old and powering a system that I just spent more than $1800 USD to upgrade.
I don't want to spend money for no good reason, and I cannot decide whether replacing this supply is a good idea or not.