By Rashika Singh and Rae Wee

(Reuters) -Global technology shares rallied on Thursday after Nvidia’s blow-out quarterly results signalled that demand for artificial intelligence hardware remains strong even as analysts caution the boom may be outpacing fundamentals.

The chip bellwether’s stellar results tempered some concerns over a potential AI bubble, although questions lingered around the sustainability of the massive spending boom not paying off as anticipated.

Nvidia is on track to add about $243 billion to its market cap, which is more than entire valuation of companies such as PepsiCo, and Goldman Sachs, if gains hold, with shares up 5% at $196.53 in premarket trading.

Bullish spirit lifted many tech stocks around the world, with shares of U.S. chipmakers Advanced Micro Devices a

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