Some real oddness going on here. Having some issues with my X-Fi Fatality Champion Card (PCIe).
Basically I am getting sounds reminiscent of a 1940's gramophone coming through both the front bay (via headphones) and through the regular rear jack too. On-board audio is completely disabled through the BIOS.
Here is where the weirdness begins though.... On my rig I have two GTX 460s running in SLI mode. The Sound card is positioned (with ample room) between the two cards. If I completely disable SLI mode, the sound is crystal clear. Turn SLI back on and we are back to the 1940s
Initially I thought it was a problem with the MOBO (the mobo was reporting ram incorrectly - turned out to be bad slots) but since the board was RMA'd its made no difference.
Things I have tried so far:
1) Put fresh HDD (Running Windows 7 Ultimate 64) in and installed drivers from scratch and still the problem persisted. The problem would disappear completely when SLI was switched off.
2) Swapped Mobo.
3) Tried the speakers (Logitech 2.1) on a separate machine and they were crystal clear.
My gut feeling is that the PSU is not powerful enough and just wanted other insight to this.
My system spec:
650W Corsair PSU
Intel i5-760 (OC'd to 4GHz)
6GB DDR RAM (4 sticks)
1TB Sata Drive
2 x GTX 460s (Running in SLI)
Fatality Champion Series Sound Card w/ Front Bay (PCIe)
2 x 120mm case fans + Corsair Water Cooler (For the CPU)