SiS announced the Advanced HyperStreaming Engine (AHSE) technology and its implementation in the SiSR659 series chipset.
Utilizing a high speed Rambus® memory interface and controller technology with support up to 16 GB of quad channel 1200 MHz RDRAM, the SiSR659 delivers an outstanding 9.6 GB/s of memory bandwidth - making it the fastest chipset on the market today. To support the high speed and capacity of Rambus® memory, SiS implemented the new Advanced Hyperstreaming™ Engine architecture to give the SiSR659 full compatibility with 800MHz FSB CPUs. The SiSR659 brings overall system operations to an unsurpassed level of performance.
As the name implies, AHSE is an advanced version of the Hyperstreaming™ Engine. AHSE technology features “Low Latency with single stream”, “Pipelining and Concurrent Execution with Multiple streams”, “Prioritized Channel with Specific stream”, “Smart flow control and Intelligent arbitration with Smart stream” and “Advanced stream accelerative technology”, compared to Intel's PAT, provide a remarkable improvement in transfer speeds between the CPU, DRAM and the north-bridge chipset. While AHSE shares the same high-speed hardware read/write capabilities that are inherent to HSE it is also compatible with identical operating environments and supports the same graphic and audio capabilities. The outstanding memory bandwidth supported by AHSE makes a clearly noticeable improvement in overall system performance.
AHSE fuses these five technologies, and integrates hardware management and system resource allocation, including the CPU, front side bus, south-bridge chipset, memory controller, graphics interface, and peripheral I/O to push personal computing to the cutting edge of performance. By taking full advantage of the Intel platform and high speed Rambus® memory technology, the SiSR659's advanced architecture meets the needs of the most demanding high performance user.
The SiS R659 Northbridge chipset main features :
Supports IntelR FSB 800/533/400 MHz Pentium® 4 CPU and Intel® Hyper-Threading™ Technology
High Performance Quad Channels PC1200 RDRAM Controller :
Supports PC1200 Direct RDRAM
Directly supports 4/2 RDRAM direct channels operating in Lock-step mode
Delivers 9.6GB/s Memory Bandwidth with Quad Channels operating
Supports up to 32 devices per RIMM and up to 128 devices while fully populated
Supports configurable ECC function
Universal AGP 8X rev3.5 Interface
SiS MuTIOL® 1G Delivering 1GB/s Bandwidth :
Proprietary Interconnect between SiSR659 and SiS964
Bi-Directional 16 bit Data Bus at 533MHz Operating Frequency
Most likely this will be one of the last chipsets that supports RDRAM.
More info about the R659 chipset can be found here.