Not everyone is hyping Nvidia earnings. Here's why one analyst says the chip maker is 'ridiculously' overvalued.

• Nvidia stock is way too expensive, even taking into account its stellar second quarter earnings, one analyst says.
• The chip maker pulled a record $13.5 billion in revenue, causing its stock to jump 7%.
• The firm would need to grow revenue 20% for the next 25 years to justify its current price, according to David Trainer. 

Nvidia's blowout earnings report for the second quarter has everyone on Wall Street seemingly sold on the limitless potential of the top chip maker. Some are even calling Nvidia "the most important company to civilization."

David Trainer, CEO of research firm New Constructs, is not among them.