Graphics Card Interference

I have a Sound Blaster Audigy SE and a Adcom GSP-560, the issue that I'm experiencing is that when I have my computer plugged in (via 3.5mm) it gives a high pitch noise that gets worse as the GPU usage increases.

There is no static when I plug into my phone, so the amp is not at fault. I was told on Overclock.net that it was GPU interference, and one way to get around this was to use a DAC.

I was told "even a cheap one will do it for you"

So I've been looking around ebay and just found some cheap ones

http://www.ebay.ca/itm/MUSE-24Bit-192Khz-Digital-Optical-Coaxial-Analog-RCA-Audio-Converter-DAC-B-/180819880444?pt=LH_DefaultDomain_0&hash=item2a19b469fc#ht_3856wt_1395

http://www.ebay.ca/itm/MUSE-24Bit-192Khz-Digital-Optical-Coaxial-Analog-RCA-Audio-Converter-DAC-S-/220948434986?pt=LH_DefaultDomain_0&hash=item33718d902a#ht_3856wt_1165

Do cheap ones give out poor audio? Also will my on-board be useful at all? Is it a better idea to just get a new sound card? Or will that not do anything?

Thanks.

Links

http://us.store.creative.com/Creative-Sound-Blaster-Audigy-SE-PCI/M/B000LP0R3E.htm Soundblaster Audigy Se

http://www.users.interport.net/a/d/adcom/gsp560.html   Adcom GSP-560

http://www.overclock.net/t/1191715/is-my-audio-card-dying Overclock.net thread

Quote:

Originally Posted by stv014 

Do you also hear the noise if you do not connect any external amplifier to the sound card, and listen with headphones instead ?

 

No, clear sound. The guy on Overclock.net said that my sound card and amp together is double amplifying the sound so that's why it's picking up the GPU interference 

Quote:

Originally Posted by stv014 

If the interference only appears when using an external AC powered amplifier, it is most likely caused by a ground loop (this problem is unfortunately quite common), but sometimes a broken ground wire in the cable may also be the reason.

 

The house I'm renting right now doesn't seem to have the best foundation, if I walk into the living room where a lamp is plugged in, if I stomp my feet enough the light will start to flicker.

I wanted to test the ground but I don't have any tools to do so right now

Oh wait. Found a different power cord and also remembered I brought my multimeter. 

Looks like theres no breaks in the ground line on my power cord and the wall socket seems to be grounded

Quote:

Originally Posted by stv014 

I meant the cable used to connect the amplifier to the sound card. But experimenting with the power strips used for the amplifier and the computer, and grounding (or not) the PC may reduce the noise if you are lucky.

 

Used different cables with the same result

LIES! I found my dads acoustic research cables they eliminated the static THANK YOU SO MUCH. Didn't think that would be the issue, I guess cables really do make a difference.