This PC is too slow to use as configured.  The Optane memory does not provide enough speed increase to make the hard disk practical as a boot disk.  I tried to add a 120 GB solid state drive, but even after I disconnected the CD/DVD drive, there wasn't enough power from the 300 watt power supply to run it.  If you look at Bios>Advanced>PC Health, you can watch the voltages move up and down.  This shows that there isn't enough power to run both drives.If the SSD is the boot drive, and the hard drive is disconnected, it works great.  The CPU performs slightly faster than my old i7-3770.To use the PC at acceptable speed, you either have to replace the power supply with 450-500 watts, or you have to buy an externally powered case for the hard disk drive.  I'm used to building PCs, so I have spare power supplies which I can use to replace the power supply.  This requires reconnecting all of the wires from the power suply to the motherboard and the disk drives.For beginners, it will be far easier to remove the hard drive and put it in an externally powered hard drive case, connected to the PC with a USB 3.0 or USB 3.1 cable.I installed the SSD with velcro to the bottom of the computer case.  The SSD has no moving parts, so velcro strips are strong enough to hold the SSD in place, yet allow the removal of the SSD, if needed.To clone the operating system from the hard disk to the SSD you need to use software like AOMEI Backupper or Mini Tool Partition Wizard.Edit 11/17/2019:  The metal shelf that supports the CD/DVD drive prevents unplugging the 300 watt power supply.  I don't see a way to temporarily move it out of the way.  I think you would have to saw it off.  (Please let me know in comments if I'm wrong.)  I have removed the 2 TB hard drive and put it in an external USB3.1 external drive case.  This is a good solution.