Dear colleagues

Please can anyone advise:

I have the above i5 2.4ghz system, and am using it at home for wifi

I understand the adapter is a  Wifi LInk series 6000 agn adapter.

A quick check on my speed (looking in the control panel) showed it changing from 39 Mbps upto at times 117 Mbps, with the most common reading being 78 Mbps

I have seen it on the internet that an adapter with 801.11AC protocol is supposed to be faster.

Please can anyone advise: if I were to replace my existing one with the AC adapter would I experience a stronger signal: Would it be a worthwhile upgrade?

any comments would be much appreciated

Best wishes

Ian