by Anton Shilov
02/12/2007 | 01:58 PM
Advanced Micro Devices, the No. 2 maker of x86 microprocessors, continues to unveil details about its forthcoming code-named K8L chips for various applications and quad-core chips for servers. During a presentation to the International Solid State Circuits Conference (ISSCC) AMD unveiled some of the technologies that are set to reduce power consumption of the new chips.
Earlier it was indicated that improvements of AMD PowerNow! technology will enable systems based on native quad-core AMD Opteron processors to dynamically adjust frequencies at the individual core level for further power consumption reductions.
In addition, the new K8L processors will be able to change voltages of different partitions of the chip individually as well: for example, it will be possible to reduce processing engines’ voltage independently from memory controller. This enables the memory controller to service external memory requests independent from core p-state transitions, thus enabling p-state opportunities which can lead to additional power savings.
Additionally, the system memory interface of K8L also includes a feature that powers down memory logic when not in use.
AMD has also made extensive use of “clock gating” in the “
As previously reported, AMD’s code-named
“Today’s IT system purchasers must weigh performance-per-watt as well as raw performance as they make their buying decisions,” noted Nathan Brookwood, Research Fellow at Insight 64. “By doubling the number of cores, adding a shared third level cache and applying a variety of other extensive CPU design enhancements, AMD’s ‘