Weird PSU noise

I have a problem with my PSU i guess , it's making a weird noise it started today , never had that before , it's like something is buzzing inside it. I tried to hear it closely to tell if it is the GPU or the PSU and i think it's the PSU issue...It happens only when i'm playing games , it starts to do this and it's very loud:
I would be very thankful if someone helped me solving this issue :|

PSU: OCZ CoreXStream 500W

PS. Today i was cleaning my PC getting rid of the dust inside , and after that i noticed the problem.
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    Your link is dead, so i can't hear the noise and tell if it's the coil whine or fan bearing noise. Either way, while OCZ makes fairly good SSDs, that specific PSU is low quality unit using HEC platform.

    For better PSU build quality, i suggest you replace your PSU with proper power plant. Anything from Seasonic will do just fine, in 500W range. E.g M12II-520 EVO or G-550. Both PSUs are good quality units.

    All my 3 PCs: Skylake, Haswell and AMD are also powered by Seasonic. Full specs with pics in my sig.
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