Problem on snd_ich module

[Angka H. K.]

My card is recognized as Intel ICH 6 and using conexant ac 97 codec. Here is my pciconf -lv output

pcm0 at pci0:30:2: class=0x040100 card=0x3080103c chip=0x266e8086 rev=0x03 hdr=0x00
    vendor   = 'Intel Corporation'
    device   = '82801FB/FR/FW/FRW AC '97 Audio Controller'
    class    = multimedia
    subclass = audio

My problem is: 
When module snd_ich loaded my system becoming very slow. 

>From the "top" command i get the"CPU states:" for the interrupt is high, up to 80%
It's not happen when using 5.x but the codec known as unknown.