This might be a difficult question, so thanks in advance for reading.
I've bought a Female 7.4 x 5.0 mm to 4.5 x 3.0 mm Male adapter for my new charging brick. This new brick should work with my laptop as it has the same brand (HP), same polarity (positive center), same voltage (19.5), higher amperage (16.92 vs 10.3) and higher wattage (330 vs 200) as my old power brick. As the new brick has a larger barrel port than my old one, I had to use an adapter but I did not expect any problems. Indeed, the laptop charges perfectly fine with this setup. However, when performing intensive tasks like gaming, the laptop lags and I get these spikes up and down in the performance of my CPU and graphics card. Upon further investigation I found that the amperage delivered to my laptop with the new (higher amperage) brick is considerably lower than with the old (lower amperage) brick. What am I missing here? Is it theoretically not possible to use such power barrel adapters at max amperage due to the size difference? Is the adapter faulty or maybe a mismatch with the new power brick I am unaware of?