Is this supposed to happen?

I just bought some TYG02s and I thought I was in for a pleasant experience but my 1620 is still doing this thing. It just stops burning for a couple minutes, then starts up at a really low speed and poor quality. The spot that it does it isnt exactly the same for every disc but they all look like this
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i checked my dma settings and its mode 2 like its supposed to be
maybe i dont have a big enough power supply?