Feeds
70%

AMD CPU shoot-out: Phenom X3 and X4

Intel killers?

Top three mobile application threats

Review The birth of AMD’s quad-core Phenom processor was plagued with problems. After a gestation period more akin to an elephant than a CPU, the new silicon popped out puking and bawling but was clearly a bit of a runt.

The problem was the now-infamous TLB error that crippled performance and reduced clock speed with the result that the B2 stepping of Phenom was only available in two models.

AMD Phenoms

AMD's Phenoms: (clockwise from top left) 9600, X3 8750, X4 9750, X4 9850

Neither the 2.2GHz Phenom 9500 nor the 2.3GHz 9600 delivered enough performance to trouble Intel's Core 2 Quad Q6600, which was a direct competitor at the same price. As an added kick in the teeth, Phenom would barely overclock while the Intel processor could manage a clock speed of 3GHz without breaking a sweat.

AMD fixed the TLB problem with its B3 stepping and also got a bit creative with the model codes that it used. Phenom X4 9x50 denotes a quad-core B3 that effectively replaces the original Phenom. The Phenom X3 8x50 is also a B3 but is unusual in that it's a tri-core processor. Phenom is similar to Core 2 Quad in many respects but there is one significant difference as Phenom is a native quad-core design with all four cores on the same die. By contrast Core 2 Quad is a dual-core design, so Intel uses two processor dice to cobble together its four-core CPUs.

Naturally, AMD touts this difference as a major advantage for Phenom as it allows HyperTransport to strut its stuff, while Core 2 is theoretically crippled by a lousy communication path through the frontside bus and then off to the northbridge of the chipset to the memory controller.

Seven Steps to Software Security

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.