I am having system lockups. Some days are better than others. I mainly have lockups while playing Delta Force: Land Warrior. I have tried everything I can think of to fix problem but with no success. I had this problem before I got a new tower and power supply and was able to stop it by taking the cover off of the old tower and running a fan on the pc. But now with the new tower I am having the problem. I have reformated drive, bought new memory, used several different modems, used two different agp cards, installed fan on hard drive, and put new heat sink and fan on cpu. Lockups mainly occurs while playing the game online. I have also noticed that my video, modem, sound, acpi, and usb contollers are all using the same irq. I have tried to change this issue with no success. I have also noticed an error on bootup with the acpi trying to write to an illegal I/O address. I have all the latest bios drivers, modem drivers, agp drivers, and sound drivers. Have tried different tweaks on system have noticed no performance changes and lock up still occurs. The only thing I haven't tried is a new hard drive, motherboard, and cpu. I figured when a cpu goes bad it goes all at once. Please help.
System Specs.
AMD athlon k6 type 4 1. GHz
Maxtor 14 gig HD
Chaintech Geforce 2 mx 400
Corsair pc 133 sdram 512 m 1 stick
Fic 1st Mainboard AZ11
Motorola SM56 Modem
AC'97 onboard sound
Antec full tower with 4 case fans and 420max watt power sup
Coolermaster copper heatsink w/heatpipe and 7000rpm fan
HD fan
I hope this is enough info