DualDDR2 Memory Architecture

With the increasing use of digital consumer electronic devices, PC digital media authoring applications and high bandwidth connections, the traditional PC architecture is easily strained by users' expectations for interactivity. PC users want to capture, edit, publish and share their media. They want to multitask, and consume media while interacting with other applications. PCs are getting smaller, yet owners demand more performance, particularly from the graphics subsystem. Ultimately, there is no PC subsystem more visibly affected by an under performing memory design.

PC users want to simultaneously interact with multiple large media files, requiring more memory, more system bandwidth and lower access latencies so that each application can get what it needs without having to wait.

Now, NVIDIA is able to deliver the highest overall system performance. The NVIDIA® nForce™4 SLI Intel Edition DualDDR2  memory architecture optimizes system performance by increasing bandwidth and reducing memory latency.

Features of DualDDR2 memory architecture include:

• Highest memory bandwidth: DualDDR2 combines the power of DDR2 667 with two independent memory controllers, which yields a staggering 10.6GB per second of memory bandwidth. Increased memory bandwidth delivers better system and graphics performance, resulting in more overall productivity.
• Lowest latency: Both memory controllers have dedicated address and command bus for each memory DIMM. The loading of the address bus is a major limiter of the memory interface speed. By using a dedicated address bus per DIMM rather than sharing them across multiple DIMMs, NVIDIA has ensured that not only can the memory controller support high data rates but can also operate with aggressive 1T address timing, which reduces the memory latency. 
• DASP 3.0: The third-generation DASP 3.0 (dynamic adaptive speculative preprocessor) consists of pre-processors that are tasked to track data threads and pre-fetch the appropriate data.  It has been re-architected for improved performance and lowest latency.
• QuickSync: NVIDIA nForce4 SLI (Intel Edition) is designed to allow the use of the highest possible FSB and memory speeds without any negative impact on system performance. It features a patent-pending QuickSync synchronization technology that transfers memory requests and data between the FSB and memory clock domains in the shortest amount of time, thus maximizing system performance.