I am using the Red Hat Enterprise Linux AS release 3 (Taroon), 2.4.21-4.EL. When I see the output of the command 'top'. I am getting the following

************************************************************************************

2 processes: 227 sleeping, 5 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 80.0% 0.0% 0.3% 0.0% 0.0% 0.0% 19.5%
Mem: 2063228k av, 2043904k used, 19324k free, 0k shrd, 38356k buff
1561324k actv, 0k in_d, 44184k in_c
Swap: 4096532k av, 9172k used, 4087360k free 1635504k cached

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
1124 root 25 0 59208 41M 3932 R 78.8 2.0 1290m 0 /usr/X11R6/bin/X :0 -auth /var/gdm/:0.Xauth vt7
14778 oracle 15 0 52876 50M 50712 R 1.1 2.5 0:03 0 oraclehsblr4 (LOCAL=NO)
351 root 15 0 0 0 0 SW 0.1 0.0 2:44 0 kjournald
14973 hedgestr 15 0 1320 1320 892 R 0.1 0.0 0:00 0 top
1 root 15 0 512 512 452 S 0.0 0.0 0:06 0 init
************************************************************************************************


Here the command `/usr/X11R6/bin/X :0 -auth /var/gdm/:0.Xauth vt7` is taking 78.8
%CPU. I guess that command was using by X-Server. But How would I controll that command to use minimum %CPU.

HELP REQUIRED.