LaoTzu said:
Yeah sonnet wouldn't give out a 3 year warranty if it was unstable above 1.42GHZ.
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPC7448&nodeId=0162468rH3bTdG8653
If they 7447A only goes to 1.42GHZ before it's overclocked, then the 7448 is always an option.
The MPC7448 processor represents the most significant product update in the MPC74xx line of processors to date. The MPC7448 is the first high-performance processor manufactured on 90 nanometer silicon-on-insulator (SOI) process technology and continues Freescale?s strong legacy of providing Power Architecture products with extensive processing performance at very low power. The MPC7448 is designed to perform between 600 MHz and in excess of 1.5 GHz, contains a full megabyte of L2 cache and offers enhanced power management capabilities. MPC7448 processors are ideal for leading-edge pervasive computing, embedded network control and signal processing applications.
AltiVec Engine Acceleration
The MPC7448 includes the same powerful 128-bit AltiVec vector execution unit as found in previous MPC74xx devices, but with the enhanced support for out-of-order instructions. AltiVec technology may dramatically enhance the performance of applications such as voice over IP, speech recognition, multi-channel modems, virtual private network servers, high-resolution 3D graphics, motion video (MPEG2, MPEG4), high fidelity audio (3D audio, AC-3), and so on.
AltiVec computational instructions are executed in the four independent, pipelined AltiVec execution units. A maximum of two AltiVec instructions can be issued in order to any combination of AltiVec execution units per clock cycle. In the MPC7448, a maximum of two AltiVec instructions can be issued out-of-order to any combination of AltiVec execution units per clock cycle from the bottom two AltiVec instruction queue entries. For example, an instruction in queue 1 destined for AltiVec integer unit 1 does not have to wait for an instruction in queue 0 that is stalled behind an instruction waiting for operand availability.
Power Management
Continuing to pursue lower and lower power consumption is a keen focus with the Freescale family of Power Archtitecture processors, and the MPC7448 is no exception. Power management features include:
Expanded Dynamic Frequency Switching (DFS) enabling software to change power consumption
Nap and Sleep modes
Voltage scaling down to at least 1.0 volt
Added benefits of 90-nm technology:
Multi-Vt and Triple Gate Oxide integrated transistors for low standby power
Low-K Dielectric for high performance with reduced power and noise
Temperature sensing diodes included to monitor die temperature
The e600 core is virtually identical to the G4 core, but with enhancements to L2 cache and AltiVec implementation, and it is manufactured in 90nm technology. Software written for the MPC7447 and MPC7447A will run seamlessly on the MPC7448. MPC7448 can be a pin-for-pin compatible drop-in replacement for MPC7447A.
It's just too bad that the 7448 is very expensive but it runs cooler than the 7447A does. So if they G4 ever goes to dual 2.0 i bet it will with these chips.
