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Dell XPs15 9500 rant - and Killer networking

  well i bought a new laptop.  For most of my career i have been working on the road so had an appropriate laptop for lugging around, with all the RAM/CPU sacrifices that that entails.  The last couple of years I've been more home-based due to my role, so finally decided to pony-up and buy myself an XPS15 9500. £2500 is not an unsubstantial purchase but i was pretty confident in it.  Reviews were good, 32GB ram means finally Teams isnt eating all my RAM up (thanks MS) and it arrived. Within 6 weeks it had had a catastrophic failure of the MOBO.  I have full next day support so an engineer arrived and replaced all the inner workings of the machine (!) and all appeared well.   However since then this machine has been a nightmare.  The network card inside is Killer AX1650 and it "should" be grand.  However: - it syncs to my network slower than 4-5year old machines (c.100-300Mb/s) - it drops packets all over the place, which is a real issue when your a home worker (it always