My main PC is a socket AM3 machine that I built back when it's motherboard and CPU were new.. probably 2010.
I moderately upgraded the video card a couple times, it now has a GTX285 in it.
Powering up can be frustrating because this system occasionally trips the PSU's overcurrent protection when it switches on, forcing the unplug/wait/retry ritual. I've tried multiple PSUs and other theories, I think it's a weird motherboard issue.
"Suspend to RAM" S3 standby has never worked with this motherboard, so if it's being used on an ongoing basis throughout the day, it pretty much is left running all the time.
The whole GTX2xx series of video cards has broken power management when multiple monitors are connected. They also run hot, needing manual override of the fan speed to help keep them at less ridiculous temperatures. Because these GPUs were intended for high powered gaming PCs, they didn't waste silicon on any useful degree of H.264 decoding support. Playing videos is CPU intensive, and just being turned on is GPU intensive because that's how GT200 rolls.
There is some issue that keeps me from being able to run TRIM on SSDs with this system. I run it with a Seagate SSHD instead.
It doesn't make any sense to use this as my main everyday PC. For a few years now I've been trying to retire it to only be used for occasional, late WinXP stuff.
But I keep going back to using it for everyday computing. And I'm back to that point again. I'm probably going to wear out the working life of this hardware using it to browse web sites, watch videos, and type spreadsheets.
A few months ago I added a dual boot of Linux Mint alongside the WinXP install. Linux gaming performance is awful with this video card, which makes it's usage in this machine even more of a waste.
Recently I got into playing a couple modern games, so now I'm looking at putting Windows 7 on it to get the performance back.
If I could afford it, I wish I could build a suitably updated machine for everyday applications and modern games. But I can't ever seem to reach that point.
I have one machine that almost fits the bill, but it's being used as an HTPC attached to a television. Not wanting to disrupt that, this 2010 build remains my next fastest system.
So I'm going to keep beating up a GTX285 to play new games that would be better suited to a GT1050 or somesuch, and keep heating my room to watch youtube videos.