Extended edition single player lag spikes

Hi all,

Its another one of those posts... I have fiddled around with the graphics to try and make it less stuttery but I did notice that my tt ut rt thingy kept spiking at the same time. the UT would shoot up to 75 and then back down to normal again.

I did a google and this seems to be something to do with network play, but I am playing single player?

Is it possible to set it to offline mode so that I might avoid this?

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Thanks