EDIT: I'll attempt to keep this 1st post factual and update it with info. The replies in the threads however tell a very sad story about the companies behind this product.
REPORTS ABOUT THE PROBLEM
Posting for awareness after my VPP755 in use for 7 days fell victim to the same type of noise as in the videos below. They are all from folks whose VPP755 pump got noisy after a while. It looked like a promising pump on paper, which was initially silent even at 3500 rpm in my case (with a Watercool Heatkiller D5 top).
Video reports:
Audio report from someone else:
More reports on Reddit:
REPORTS ABOUT THE PROBLEM
Posting for awareness after my VPP755 in use for 7 days fell victim to the same type of noise as in the videos below. They are all from folks whose VPP755 pump got noisy after a while. It looked like a promising pump on paper, which was initially silent even at 3500 rpm in my case (with a Watercool Heatkiller D5 top).
Video reports:
- (this is mine, note that it's sitting on a thick sponge, completely decoupled from the case; fan noise for comparison before switching on the pump; noise is the same regardless of the o-ring used).
Audio report from someone else:
More reports on Reddit:
- ).
My RMA experience
2017-02-26: RMA opened at Aqua Tuning.
2017-03-06: RMA not going that great, see here. I was asked for video evidence (!).
2017-03-10: More progress on my RMA here. I was allowed to send it back. They conditioned the refund on reproducing the fault.
2017-03-18: Pump sent back to Germany. I pointed out that I opened this thread on OCN.
2017-04-04: Full refund received, more here.