I have problem when using multiminer: if Intensity=13 , the vga only load 96%, if increase Intensity>13, the vga will load 99%. but the best parameter for vga 797 is  --worksize 256 --thread-concurrency 8192 --lookup-gap 2 -g 1 -I 13

how can I fix it ? I don't want to increase Intensity
please help me

If I only use cgminer (don't use multiminer), the vga load 99% with Intensity 13