Your mem is about 25% but the SL mem capacity is 1024
The only way is - Good CPU + SSD
If you drive fast in Valo the game can't rapidly load the files from hard drive and render em
If you have good CPU use more view distance , so it will load/render the pop up mods in the scene early not in the last moment.
also try the Cleen Valo City mod by NITROLANCER