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Yonah 32 bit is DOA

http://sharikou.blogspot.com/

INTEL has efficiency problem in the Yonah core

Anandtech has an exlcusive benchmark on INTEL's Yonah dual core notebook chip against AMD's Athlon 64 X2 3800+. The Yonah is 2GHZ with 2MB cache made on a 65nm process, the Athlon 64 x2 3800+ is 2GHZ with 1MB cache (2 x 512KB). As you can see, despite having twice the cache, the 65nm Yonah CPU is slower than Athlon X2 3800+ at the same frequency in most of the tests, sometimes significantly so. For example, Yonah 2GHZ is 20% slower than Athlon 64 X2 3800+ in video encoding tests. In all, the score is 16 to 6, the x2 3800+ won 16 tests, and the Yonah won 6 tests.

This is not surprising, in a comparison of INTEL Dothan 760 (2GHZ, 2MB cache) and AMD Turion ML 37 (2GHZ, 1MB cache) done by laptoplogic, the Turion won 15 tests, the Dothan won 7 tests.

From this, one can conclude INTEL's Dothan and Yonah CPU cores are lower than Athlon 64 core on 32 bit IPC (Instructions Per Clock).

Furthermore, Yonah is a 32 bit chip based on the old Pentium III. In June 2005, Mooly Eden, an INTEL VP claimed that enterprise demand for 64 bit is low. INTEL "made a conscious decision" to not add 64 bit to Yonah to achieve reasonable battery life. Eden claimed that "It may take many years for enterprises to demand it (64 bit)". As a result, INTEL's Sossaman CPU, which is adopted from Yonah for servers, will also be a 32 bit chip. The Athlon 64 x2 is a 64 bit chip by design and can run future operating systems such as Windows Vista, which is a 64 bit OS to be released in 2006. The Athlon 64 X2 gets a 30% performance boost under a 64 bit OS.

AnandTech also compared the power consumption of two systems under max load. The Athlon 64 X2 3800+ desktop consumes 144 watts, the Yonah consumes 108 watts. The Athlon 64 X2 consumes 36 watts more. According to AMD, the Athlon 64 x2 3800+ is a 89 watt chip, therefore, the Yonah is at least 89- 36 = 53 watts*, which is basically the power consumption of two Dothan cores. This indicates that INTEL gets no power reduction by going from 90nm to 65nm. A very bad sign, because INTEL's speed will be again limited by heat. In comparison, the popular AMD Opteron 870HE, a 8 way 64 bit server processor at 2GHZ is 55 watts.

From AMD's persentation, with DSLSSOI, AMD's 65nm is much lower on power.

Posted by: sharikou   Posted on: 12/19/05 You are currently: a Guest | Members login | Terms of Use

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