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From what you say - Time for a new Psu ?
Had this response from vtx3d
" Tks for using VTX3D Product. Please kindly provide Serial number labeled on the card. It looks like this one: “PGxxxxxxxxx”
The fastest way to process RMA is to return the card to the shop or etailer you purchase from. If you can’t reach them, I will use the Serial number to contact local partner and check the warranty shortly.
You’re very welcome to reach me if there is any question or problem.
Best Regards "
But yeah, contact information is in Taiwan.
Price was too good to turn down at £190 inc p+p.
Mixed opinions on vtx3d all over the web.