I'm having difficulties to use GPO + Flstudio with my old laptop.

Celeron 1.1 GHz, 256 mb SDRAM, Ali Audio Directsound.

EWQLsilver and Edirol work fine with FLStudio, but GPO gives many glitches and my CPU always goes to the limit when I put in 2 instruments, so rendering is also impossible. Is this normal for such a computer and will 512 mb RAM solve this problem?