JJRC X9 video resolution rts3904n chipset realtek

Hello friend two model for jjrc x9

making picture and video with 1280x720 witout memory
With memory picture and video 1920x1080p

Pls like this link

1080p @45fps mpu600mhz 1gb ddrIII

I have changed video board rts3904+n_air_v1.0 and v1.2 with old main board and have same resolution