By Benjamin Pimentel

Intel Corp.'s surprising strong second-quarter results triggered a tech sector rally on Wednesday, pushing the Nasdaq Composite Index back above the 1,800 mark.

The rally pointed to rising confidence in a tech rebound, as investors braced for more earnings releases, including Thursday's much-anticipated report from another industry bellwether, Google Inc. (GOOG)

Intel's (INTC) stunningly upbeat report, which kicked off the tech earnings season, prompted one analyst to refer to the Major League Baseball All-Star game, calling the chip giant's results a "grand slam."

"In addition to Pujols and Jeter, Intel also showed up at the MLB All-Star Game and then hit a grand slam by delivering significantly higher revenues and gross margins for both second quarter results and the third quarter guide, respectively," Wedbush analyst Patrick Wang told clients.

Intel late Tuesday posted impressive adjusted earnings, and issued a better-than-expected third-quarter forecast. The company's shares soared more than 7%.

The Santa Clara, Calif.-based tech behemoth's results triggered a buying spree in the chip sector and beyond, pushing the Philadelphia Semiconductor Index (SOX) up by more than 4%

Intel's arch-rival Advanced Micro Devices Inc. (AMD) gained more than 9%, while Texas Instruments Inc. (TXN) rose 3.5%.

These gains boosted the Nasdaq (RIXF) by more than 2% to 1,848, while the Morgan Stanley High Tech 35 Index (MSH) added more than 3%.

Major bellwethers gained more than 2%, including Google, Hewlett-Packard (HPQ), IBM Corp. (IBM), Oracle Corp. (ORCL) and Microsoft Corp. (MSFT).

Cisco Systems (CSCO) was up more than 4%, while Juniper Networks (JNPR) gained more than 6%.

The tech gains helped lift the broader market as the Dow Jones Industrial Average (DJI) gained more than 170 points.

Still, some analysts counseled caution, casting doubt on speculation that Intel's robust performance signaled a comeback for the industry.

Many chipmakers have seen sequential gains in sales recently due mainly to what analysts say was an inventory correction following the economic downturn as manufacturers scaled back chip supplies to levels below real demand.

"Although the Intel quarter was clearly spectacular on all fronts, we continue to believe the upside was driven by inventory replenishment as we have not seen any evidence of increasing PC demand," J.P. Morgan analyst Christopher Danely said in a research note.

In fact, Intel's report followed a sobering update from one of its major customers, Dell Inc. (DELL), which warned that weak demand in the corporate sector will continue to pressure its earnings.

In fact, Intel Chief Executive Paul Otellini also told analysts that, while consumer demand helped the company's sales, "enterprise PC volumes remain weak," although server processor volumes were better than expected."

Dell also said it expects a slight increase in revenue, but lower gross margins. That prompted Caris & Company analyst Curtis Shauger to speculate on what Dell and Intel's reports mean for another major tech player, software giant Microsoft Corp. (MSFT)

"There is little doubt that Intel's results indicate the potential for better than expected PC unit volumes," Shauger wrote. "Checking this against Dells guidance of 'slight increase' in revenue it would seem that a decent portion for the differential is inventory replenishment, which does not benefit Microsoft."

Meanwhile, analysts await Google's report, which is widely expected to show the Internet giant posting growth, but at a slower pace.