Noise Issues, just about solved!
YESSSSS, I am finally making progress after several weeks of this BS..
So, I got those vinyl stand-offs, but bah humbug, if my casetronics cubid 2699R case doesn't allow for different stand-offs, like a traditional PC case does.. DOH! So scratch that.
While I was disassembling my motherboard/case to do this, I had to yank my PCI sound card, or at least the PCI riser to get the motherboard free to pull out. So now instead of using nylon stand-offs, I basically ran the motherboard outside of the case...
NO NOISE!!!!!!!!!!!!!! WOOOHOOO!
So then I hooked it up to the PCI soundcard (Creative Labs Audigy 2ZS), and NOISE IS BACK! Then my dumb *** realized that the PCI card wasn't even hooked into the motherboard/riser!!
SO NOW I GOT IT! It's coming from the PCI card which is grounded to the CASE!
So then I put the motherboard back in and left the PCI riser out and used the on-board audio. NO NOISE STILL! So now I know that the sound is coming:
- In from power wire
- In to case which is grounded
- NOT into motherboard
- But into PCI sound card which is touching metal case in rear-mounted sideways PCI slot
- From PCI sound card out to RCAs out to Amp
So I have two options as I see it now:
1. Find a way to keep the PCI sound card from touching the metal case (how the F am I going to do this, any ideas guys?? Below is a pic of how it is mounted and looks).
2. Use onboard sound which isn't as good and doesn't have cool features like AdvancedHD and TimeCorrection/Delay... *sigh*
3. For those of you who think grounding the case would help, it does not. For whatever reason there is still noise, which essentially means that there is lower resistance through the PCI card, through the RCAs, into the amp, to the car chassis, than there is through a direct wire to the car chassis, which makes no sense whatsoever, but when I added ground wires to the pc case, it didn't help a bit so there is the laws of electricity being broken I suppose!! :(
The case setup with the riser looks like this, except my riser is for only one PCI slot. The PCI card slides in and screws into the back of the case itself. I think I would need to take the silver faceplate off of the PCI card itself, thus losing my port labels, btw, and then find some other way to secure it in place?? (= GHETTO! :()
I'm just glad this is all almost over with!
Also one side-effect of using the onboard audio is that now I get a turn-on thump when my PC gets power (not even powered on, but when the ITPS gives it the 12v power and before it gives it the turn-on command (3 seconds delay)). Any ideas how to avoid this? Maybe I need a 5 second relay for my amp to turn on? *shrug*
Also also now I have no clue what I'm going to do about my LCD, since it too is getting "noisy power" and is forwarding that through the VGA into the motherboard, which is even worse... UGH.