All power saving is switched off, in windows and the adapter individually. I'll check the ip etc next time it drops. Trying a new router now, will post back.
This modem is the Huawei HG659. I'm a little limited as to which modems i can try as im on a VDSL2 100/40 FTTN connection, comaptibility isn't the highest. I can try 5Ghz with this model though.