Windows 10 can and will use upto @ 2.5Gb of memory easily, just running anything like websurfing or office type projects. And if windows doesn't have the ram it needs, it makes it on the ssd/hdd with pagefile.sys. This can and will cause extreme lagging and stuttering as normal ram is multiple times faster than an hdd, so even doing something as simple as moving a mouse can run into issues as the pc pauses to let the hdd deliver its load of fake use memory code. 64bit (x64) OS just makes it worse as it's a lot more complex overall than 32bit (x86) OS like several versions of Windows7.
The following table specifies the limits on physical memory for Windows 10.
Version | Limit on X86 | Limit on X64 |
---|
Windows 10 Enterprise | 4 GB | 6 TB |
Windows 10 Education | 4 GB | 2 TB |
Windows 10 Pro for Workstations | 4 GB | 6 TB |
Windows 10 Pro | 4 GB | 2 TB |
Windows 10 Home | 4 GB | 128 GB |
The only possible way I can imagine a psu being involved with lag, isn't due to the new psu (which is actually decent) but to the old psu somehow causing irreparable damage to the motherboard/cpu and the inclusion of the new psu highlighting that damage. Not so much a cause, but the after affects