I just googled that driver and from a computer cops forum it had the following info:
Name: SoundMAX Integrated Digital Audio
Device ID: PCI\VEN_10B9&DEV_5451&SUBSYS_02211179&REV_02\3&61AAA01&0&30
Driver: C:\WINDOWS\system32\drivers\drmk.sys, 5.01.2600.1106 (English), 8/29/2002 04:32:34, 57856 bytes
Driver: C:\WINDOWS\system32\drivers\portcls.sys, 5.01.2600.1106 (English), 8/29/2002 05:01:00, 134272 bytes
Driver: C:\WINDOWS\system32\drivers\stream.sys, 5.03.0000.0900 (English), 12/12/2002 03:14:32, 45696 bytes
Driver: C:\WINDOWS\System32\wdmaud.drv, 5.01.2600.0000 (English), 8/29/2002 08:00:00, 22016 bytes
Driver: C:\WINDOWS\System32\ksuser.dll, 5.03.0000.0900 (English), 12/12/2002 03:14:32, 4096 bytes
Driver: C:\WINDOWS\system32\drivers\smwdm.sys, 5.12.0001.3542 (English), 1/28/2003 14:32:02, 541376 bytes
Driver: C:\WINDOWS\system32\drivers\smsens.sys, 5.12.0001.0000 (English), 10/28/2002 14:26:04, 3744 bytes
Driver: C:\WINDOWS\system32\drivers\aeaudio.sys, 3.00.0002.0026 (English), 1/10/2003 18:51:34, 98912 bytes
Driver: C:\WINDOWS\system32\a3d.dll, 4.12.0001.2008 (English), 9/19/2001 17:32:26, 720896 bytes
So are your soundmax drivers corrupted? is D3D corrupted? did the overheat cause problems on your inbuilt soundcard as well or is your whole system overheating?
If so you need to get a more powerful fan in pronto or even something that just blows air into the whole system.
Edit: the article URL in its entirety is
http://www.computercops.biz/postp189539.html