To upgrade or not

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Hello everyone.
I hope I am posting in the right forum?. At the moment I have an Asrock extreme 6 z77 motherboard and I find the onboard sound rubbish, could someone please spec me a new board with good onboard sound for gaming I am using i7 3770k cpu, Or maybe get a sound amp like the Fiio Olympus E10 Headphone Amp & DAC. I use the Sennhieser HD 595 headphones. thankyou

 

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ok thankyou very much

 

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Sorry to bother you guys again, I have been looking all day for sound card or dac for pure gaming pc, so could you guys please spec me sound card or dac for fps gaming positional sound as I have no idea at all my budget is up to £150 many thanks.

 

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cool thanks