Advanced Micro Devices is aiming to chip away at more of Intel's market share in the mobile computing market, announcing on Thursday the dual core Turion and dual core 64-bit Sempron microprocessors.

The Sunnyvale, Calif.-based chip maker will tout its new offering against Intel's popular Centrino line which has helped sales of laptop computers soar in recent years. Intel had announced in January a dual-core follow-up to its mobile processing line, offering better multi-tasking and lower power usage. The chip, however, only offers 32-bit techonology.

“AMD is first to market with the only 64-bit dual-core mobile processor said Chris Cloran, vice president of AMD Mobile Division. “This is advanced mobile technology, he added.

The Turion 64 X2 takes from the architecture AMD pioneered with its desktop processors. Borrowing from the Opteron and Athlon 64 X2 processors, the new mobile chips will feature the same Direct Connect high-speed links between cores and memory, adding increased throughput and system performance, AMD said.

Intel plans to launch a notebook version of the Core 2 Duo processor, formerly known as Merom, in August. That chip will consume less power than the Core Duo and will also support 64-bit instructions, similar to the processors announced by AMD.

That chip will outperform and consume less power than the current Core Duo, but it's unclear how it will stack up against the first Turion 64 X2 processors or later versions.

AMD Turion 64 X2 models TL-50, TL-52, TL-56 and TL-60 are available immediately worldwide. The AMD Turion 64 X2 mobile technology family ranges from $184-$354 in 1K-unit quantities.

Notebook makers such as Hewlett-Packard, Gateway, Acer and others plan to release notebooks with the chip over the next several weeks, the company also announced.