kaykol

hello. i have msi gt 638r with gtx560m video car. i want to buy; https://tr.aliexpress.com/item/YENI-GTX-970-M-GTX970M-N16E-GT-A1-6-GB-video-grafik-kart-I-in-Clevo/32914073846.html?spm=a2g0s.13010208.99999999.299.ad0b3c000ECZ1m or https://tr.aliexpress.com/item/Abdo-GTX980M-Grafik-GPU-Kart-N16E-GX-A1-8-GB-I-in-GDDR5-Alienware-Clevo-GTX980/32954000960.html?spm=a2g0s.13010208.99999999.284.ad0b3c000ECZ1m and https://tr.aliexpress.com/item/Yeni-orijinal-laptop-cpu-fan-i-in-fan-so-utma-MSI-16F1-16F2-16F3-1761-1762/32840783300.html?spm=a2g0s.13010208.99999999.259.ad0b3c000ECZ1m https://tr.aliexpress.com/item/Laptop-CPU-Cooling-Radiator-Heatsink-For-MSI-GT60-GT680R-MS-16F1-F2-MS-1761-E31-0900332/32830387092.html?spm=a2g0s.13010208.99999999.293.ad0b3c000ECZ1m https://tr.aliexpress.com/item/New-For-Clevo-P870DM-P870DM-G-Primary-VGA-heatsink-for-GTX-980M-100W-MXM-3-0b/32674365279.html?spm=a2g0s.13010208.99999999.323.ad0b3c000ECZ1m do i need bracket? and what is your opinion about 970 and 980m which one i should choose? do i need modded bios video card? thnks