GA-P67A-UD7-B3 - audio output artefacts

[fiendish]

Hi all,

Got another weird problem on this board. I get low level modulating interference artefacts on both the onboard sound output and the ouput of any third party sound card. It's a sort of grainy whitish noise with an added whine, that fluctuates depending on what the system is doing. It only starts from about the last third of the windows loading screen, nothing prior, presumably this is at the point when audio drivers are loaded.

So far I have tried two different sound cards, no sound cards at all and two different graphics cards. The problems remains.

Anyone have any ideas?

Many thanks,

Ollie

Lian Li PC-C32B Alu Case Black HTPC
Corsair 850W Modular PSU
Gigabyte GA-P67A-UD7-B3 P67
Intel Core i7-2600K 3.40GHz (Sandybridge) Socket LGA1155 Processor - OEM
Corsair XMS3 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit
Zotac Fanless GeForce GT430 1GB DDR3 ZONE Edition
Noctua NH-C14 Top-Flow Flexible CPU Cooler with 140mm fan
OCZ Vertex 2E Bigfoot 120GB 3.5" SATA-II Solid State Hard Drive
Samsung SpinPoint F4 EcoGreen 2TB SATA-II 32MB Cache x 2
Samsung SH-S223 DVD-RW
RME HDSP9632

[Dark Mantis]

Hi

Have you tried re-routing your cables both inside and outside the computer ? Often interference is picked up from a parallel cable.

Have you tried using something to clean up the mains supply ?

Make sure that you have a good earth from your chassis to the mains.

[fiendish]

Good suggestions. My hunch is that it could be a dirty supply rail, and that would suggest a PSU problem. Haven't got a spare PSU to hand but we'll try that next.

[Dark Mantis]

See if you can just borrow one from a friend for faultfinding purposes only. If it proves to be faulty then you can buy one knowing that you are not wasting your money.