Cat 5e and Cat6 are both 8 mm in diameter
Cat 5 is only 5 mg
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If you right-click on Computer and select properties. Select the Advanced tab. Select Settings under Performance. In your situation, I would select "Adjust for best performance," under Visual Effects. Then select the Advanced Tab in the Performance Options and make sure Adjust for best performance of: Programs (which, I would venture to say will be selected).
Set your maximum page file to 1.5 times your total RAM. Minimum can be 512.Or you can just let Windows manage it. Probably overstated the performance. You can Google sizes of page files in Windows and get hundreds of hits.
I think the cables we have are definitely 5e then.
In the performance options, it should be adjust for best performance of programs? I thought I read on this board that it should be background services. (I can't find that post now...)
And in the virtual memory settings, we have AC installed on another drive that's not the C drive. I just saw in that virtual memory settings box that no paging file size was allotted for that AC drive at all - only the C drive had page file size. Could this have been slowing things down?