Well looks like changing pci slots did the trick played coh for about an hour and half with no sound lock ups  thanks General for your suggestions really appreciated
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Intel Core 2 Quad Q6600 GO 2.40GHz -Tuniq Tower 120 Pro - Abit IP35-Pro - Crucial Ballistix 4GB PC2-8500 CAS5 (4x1GB) - 500GB Western Digital 16MB Cache SATA-2 Hard Drive - ATI HD 2900 Pro 512MB GDDR3 (PCI-Express) - Auzen X-Fi Prelude 7.1 - Pioneer 112DBK DVD±RW - Antec NINE HUNDRED Gamers ATX Case - Enermax Infiniti 650W Power Supply - Windows Vista Ultimate x64 - Creative Inspire 5500 5.1 Digital Speakers
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