I recently dug out an old case I had lying around and installed some parts in it to make a bare-bones PC - single IDE HDD (primary master), DVD drive (secondary master), 2x256MB RAM, Genius ethernet card, Ti4200 AGP graphics card, on a Soltek SL-75DRV5 motherboard (VIA KT333 chipset). I am using the onboard audio for sound.
From when the PC boots up, there are popping/crackling noises, particularly when there is any hard drive access or when I move the mouse (in Windows XP). I have done some research and found out that the VIA KT333 chipset was notorius for audio problems :(
I have tried the following, all to no avail
* disabling the onboard sound
* installed latest BIOS for the motherboard from http://www.soltek.com.tw/soltek/download/download_all.php?CPU_st=Socket+A&chipset_st=VIA&isbn_st=SL-75DRV5%2FSL-75DRV5-C
* installed latest VIA 4-in-1 drivers from viaarena.com (I tried the earlier driver and the newer Hyperion driver supposedly for newer chipsets)
* installed PCI latency patch from http://www.georgebreese.com/net/software/#PCI
Before this case was stored away I also had tried it with a SB Live! Value PCI sound card, which had the same audio problems.
I'm not sure what to try next. Any help would be greatly appreciated!