Three tech stocks that fell off a cliff this week. Image source: Wikimedia Commons.

The stock market had a quiet week, with all the major indices trading almost exactly sideway for five days. But NQ Mobile (NYSE: NQ), Maxwell Technologies (NASDAQ:MXWL), and Advanced Micro Devices (NASDAQ:AMD) didn't exactly relax in a hammock on the beach, sipping margaritas. These three stocks fell dramatically this week, and only one of them managed to climb back up before the weekend.

NQ Mobile is becoming something of a regular on this weekly recap of plunging tech stocks. The China-based mobile software and services company is still fighting fraud allegations, tooth and nail.

Maxwell Technologies, which makes high-powered capacitors to complement battery and fuel cell energy systems, surged in March when it looked like electric car maven Tesla Motors (NASDAQ:TSLA) might become a huge customer. Maxwell shares are sliding back down now, as the still unproven Tesla rumor is starting to lose its luster.

Finally, AMD took a steep dive on Monday morning due to an analyst downgrade. But the stock immediately started climbing back thanks to helpful rumors about AMD getting support from arch rival Intel (NASDAQ:INTC), believe it or not.

That's the bird's-eye overview of our three tumbling tech tickers. For a deeper dive into these stock stories, check out the slideshow below.