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Gigabyte GA-8S655FX Ultra SiS655FX Motherboard

Gigabyte GA-8S655FX Ultra SiS655FX Motherboard - PCSTATS
Abstract: Today we're going to be checking out Gigabyte's new GA-8S655FX Ultra motherboard which is based on the hot new SiS 655FX chipset.
Filed under: Motherboards Published:  Author: 
External Mfg. Website: Gigabyte Sep 22 2003   Colin Sun  
Home > Reviews > Motherboards > Gigabyte GA-8S655FX Ultra

Key Technologies of HyperStreaming

Single Stream with Low Latency describes a situation where one or two streams of information between any given device and SiS's 655FX chipset have been optimized for the lowest latency between the CPU and its I/O devices. These situations include; CPU-to-VGA, CPU-to-HDD, and CPU-to-Memory for example. What that means is that data will have a lower wait state between the chipsets, and depending on exactly what the processor is trying to communicate with, one should expect fairly dramatic increases in performance.

When it comes to multitasking, SiS has implemented a technology called Multiple Streams with Pipelining and Concurrent Execution. What that means is SiS has implemented a split transaction technique for the 655FX chipset - basically they split transactions into two independent sub transactions, one a request, and the other a response transaction. When other transactions can use the free EU's in between, they do, thus increasing overall efficiency.

The example above is intended to illustrate that four independent request/respond transactions can be computed while a conventional system would only be able to finish two.

To help keep things moving at a quick speed, SiS place six request/response channels (three for each) between the 655FX Northbridge and the 964 Southbridge. That is a total of 1.2GB/s of bandwidth between the two core logic chipsets. With traditional chipsets, there's only two channels (one upstream and one downstream) and all data, no matter how trivial, is treated as equal and passed through with the same priority.

With HyperStreaming, not only is the data being computed in parallel, certain data streams receive higher priority, and are thus worked on first and have more channels between the bridges. For instance, HDD performance of the SiS964 is the highest we have ever seen thanks to the fact that hard drive streams have their own independent channels to the Northbridge.

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Contents of Article: Gigabyte GA-8S655FX Ultra
 Pg 1.  Gigabyte GA-8S655FX Ultra SiS655FX Motherboard
 Pg 2.  Layout and RAID
 Pg 3.  What is HyperStreaming?
 Pg 4.  — Key Technologies of HyperStreaming
 Pg 5.  Intelligent Arbitration
 Pg 6.  The motherboards BIOS
 Pg 7.  System Spec's and Benchmarks
 Pg 8.  Benchmarks: Winbench 99, SiSoft Sandra 2003
 Pg 9.  Benchmarks: PCMark2002, 3DMark2001SE
 Pg 10.  Benchmarks: Quake III Arena, UT2003
 Pg 11.  Springdale has some real competition

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