Martin I thought of trying that, just to see what happens but I’m not keen on a black bar between the two monitors. I'm just about to go and get a 4k monitor that is the same width and height as my two 19" 4x3 monitors running one big monitor seems the way to go but I want to try a 4k TV first as monitors are expensive.
I think Peters idea about the Hyper threading has done the trick everything is like liquid smooth at last,

funny my old P4 Core 2 Duo didn’t have hyperT either and also was very smooth, the M.2 SSD drives are coping well and on a couple of notorious tile loading in Longmoor and stalls at tile changes has almost gone too. 64bit should now be the icing on the cake.
Regards to all that suggested things and I hope others might have picked up the odd idea or two
John