Hi Rdunnill,
Well, I've been working away on this.
Every device plugged into this Desktop is now disconnected; even the speakers. I swiped my wife's wireless mouse from her laptop so I could still navigate. Even disconnected the keyboard after the password was in. That 3-5 minute sleep/resume lag was still there.
I read somewhere that memory modules that are even mildly incompatible could be a cause. So out came both of my one year old Kingston sticks 4gb [2x2gb]. Then I installed four brand new 1gb sticks [4x1gb "Hyundai Electronics" modules listed specifically for this machine]. Lucky m., Of course it still made no difference in the "lag" at all.
With either brand/set of modules, the BIOS showed all the sticks as up and working with 4gb installed." Computer properties" shows the same. They do however show only 3.25gb of available memory. This is with a 64 bit OS and 64 bit CPU. The BIOS has the latest flash of A07 and the latest intel chipset update has also been done. Maybe this is just normal.
One oddity though. I downloaded SIW, and in "memory summary" it shows two big, red, warning shields. One reads "Wrong/incomplete values reported by BIOS". The other reads "Maximum capacity 1024 Mbytes [Wrong Value]". "Available memory 3327 Mbytes DDR2 [PC2-5300] DIMM". I also always noticed this with my Kingston sticks in there. When I removed one Kingston stick, leaving it with 2gb, the warning still remained. So I've always just blown it off. It seems unlikely to be a cause of this "lag" anyway?
So that's all I got. Maybe I'm just <Admin note: Substitute character removed as per TOU>
T'care,
Mike