RAID 0 in games

decrease if the speed of loading in games? as the same SSD ? or bonuses only when copying files?
Tired of long download in modern games ,SSD 120 gigs is too small for the test threw some games ,I was pleasantly surprised and quickly got used,but the disc is not rubber ,was thinking to buy the second SSD on the 512 ,but the prices there at around 11K
I have a similar animal
http://anapa.snr.ru/nakopitel_hdd_3tb_sataiii_western_digital_red_wd30efrx_64mb_intellipower_68087.html
So bungled RAID of them ,I get 6 terabytes ,at a lower price ,relative to schnike ,but what about the downloading of games and locations ,does it make sense?