Does Optik TV take up my internet speed?

[wireless]

Recently moved to new place and got 1Gb + Optik TV.
All the devices I have, hard wired directly to the modem, is getting speedtest around 450Mbps, about half of what I should be getting.
Before at my old place, I had same 1Gb plane, no TV, and i was able to get over 900Mbps on same devices...
Only difference now is new place and Optik TV option.
I'm wondering if Optik TV reserves half my speed for TV?
btw, When I'm testing speed, I disconnected all other connections including Optik TV and wireless

Technician is coming over this afternoon to take a look.


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