What is my laptop monitor's response time??

Kenton82 is correct - - it's 8ms. Found it in a vendor's review, on this page:

https://www.scan.co.uk/products/173-aorus-x7-v2-cf2-24ghz-intel-core-i7-4860hq-16gb-1tb-hddplus2x128gb-ssd-8gb-sli-nvidia-gtx-860m-p

"Full HD Display: Sharp, Vivid & Lifelike
The premium panel with 72% NTSC color gamut provides more a vivid visual experience than most panels (average: 45%). The outstanding 8ms response time eliminates motion blur in gaming; High luminance 300 cd/m2 produces extraordinary clarity even in bright surroundings or outdoors.
"