Hi folks! I have a tough, intriguing one for you: MY SYSTEM: P4 3.0 GHz HT Intel 915GAV motherboard 1 GB RAM 200 GB SATA 250 GB NCQ SATA Win XP SP2 THE PROBLEM: I'm basically doing audio and video editing, using apps like Pinnacle, Sonar, etc., using DXi and VSTi softsynths. I have 2 professional multi I/O soundcards, one is Gina (20 bit) by Echo Audio, and the other is a USB-based MIDI controller plus audio interface (24-bit) called Neon. I recently got the above system, and when I tried to use my USB interface (Neon) in Sonar, I started getting a very loud crackling noise. I checked the audio buffer settings in Sonar, which can sometimes cause such problems, but I was using ASIO drivers for the Neon, which shouldn't cause these problems normally. I tried the Gina, but the card wouldn't work at all. I downloaded the latest drivers in each case, and still it wouldn't go away. Then I took the Gina out of my system and removed all the drivers and tried again. The crackling sound continued. I tried rebooting a few times and running audio through the Neon. What I noticed is - for about 8-10 secs the audio would play fine, and then it would disintegrate again into the crackling sound. I became convinced it was a driver problem. I USE THE NEON ALL THE TIME WITH MY LAPTOP, WITHOUT ANY PROBLEMS, SO IT IS NOT A HARDWARE PROBLEM - at least not with the audio hardware. I WAS USING THE GINA IN MY PREVIOUS SYSTEM WITH NO PROBLEMS WHATSOEVER (WIN XP). I still feel it's a software problem - something to do with drivers and/or Windows itself. Then I thought that perhaps the problem is with the SP2, but I couldn't remove it, since my legal copy of Win XP Pro came bundled with SP2. (My laptop doesn't have the SP2 installed). So I contacted MS support, and they sent me a way to uninstall by removing "spuninst.exe" from the "Run" command. I tried that, and something got removed, but SP2 still remains. Then one of my friends (an audio engineer) told me that the Intel 915 motherboard has some audio issues. So I contacted Intel and they suggested I download the latest audio drivers for the onboard Realtek High Definition soundcard, as well as the latest BIOS. I did that, and hoped the problem would go away, but the problem continues to haunt me. I realise I have the option to use another drive and reload Windows XP on it without SP2. The only thing is: I'm in the middle of a tight deadline project, so I decided to go with the onboard Realtek (lower quality) soundcard for now and just do my work till I absolutely have to stop and fix the problems. I do want to try this option, however, because I have a sneaking feeling that SP2 is messing things up. Is this a problem with the 915 motherboard? Echo support told me that audio cards can have problems with HT. I don't know much about this, but I've tried disabling it and still there's no difference. The ESI support said that the 915 causes problems for USB audio interfaces, so suggested a PCI USB2.0 card and use that instead of the onboard USB slots. What I want to be able to do is: 1. Use the Neon (USB interface and MIDI controller) without any noises. 2. Use the Gina in the system too. I have used multiple sound cards before. I realise you can't do that yet if you're using ASIO drivers in an application, but other than that, I want to have that option available to me. 3. Stop losing hair and not grow old so quickly. 4. Have good sleep at night and not have so many computer-related nightmares. So if anyone out there has the solutions I would be EXTREMELY GRATEFUL for your help. Thanks so much!