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Chaintech S1689 Motherboard Review
Chaintech S1689 Review

Installation
Installation was extremely easy. Using Chaintech's user's manual I had the system up and running within minutes. The manual contains what I consider irrelevant information at the beginning, but also contains some very useful and critical configuration information.








BIOS & Overclocking
Chaintech S1689 uses a pretty basic version of an Award BIOS.



I haven't noticed any special features but one of the main features I've noticed is the advanced memory overclocking panel.




You can easily change CPU multiplier with the hammer feature provided by Chaintech's BIOS.




As well as change CPU voltages.
Hammer VID Control (CPU Voltage): 0.825 -1.550 Volt




Cool'n'Quiet can be shut down in one click. overclockers, you better shut this down as it automatically lowers your clock while idling.




Overview of the Power Management Setup panel




All onboard hardware can be also be shutdown quickly if unusable (also will give you a little performance boost)




You can also adjust AMD's HyperTransport feature.
Hammer to M1689 Freq. (HT Frequency): 200/400/600/800/1000 MHz
Hammer to Width (HT Width): 2/2, 4/4, 8/8, 16/8




However, this motherboard suffers from a great disadvantage, the CPU Clock overclocking panel in the BIOS is limited to 232MHz ONLY, I asked Chaintech why it is limited and their response was that once you pass the 232MHz barrier the AGP slot stops working.

Here's what Chaintech/ULi told us when we asked them if iIs there any way to bypass the 232 MHz bus speed limit? and what is the chipset limit?

Its a little bit difficult because the bottleneck is AGP clock rate. The current clock chip on the mother board just provides sync mode for overclocking feature. If you want to do over clocking which is more than 232MHz, you need to change a new clock chips which support sync mode overclocking features. It means that the 66MHz AGP clock will be fixed and you have to use the HyperTransport bus clock to overclock.




After a quick review of the features provided by the BIOS we found the PC Health section. After we entered, it showed that my CPU was running at 124 degrees Celsius! This is unlikely to happen to a non-overclocked Athlon64 Venice 3000+ running on stock 1800MHz. After touching the heatsink attached to the CPU and it was cold, we realized immediately there is a problem with the temperature sensor. After browsing the web for the problem, I found a thread about this issue. It seems like the bios has some problems calculating the right temperature for Venice cores. I downloaded a program called DigiDoc that collects the information from the sensor and calculates the temperature by itself. DigiDoc says I'm running on 50C-60C which looks pretty normal compared to 124C the BIOS detected.

Here's a response to some random user received from Chaintech (found this in some support forum):

"Due to Third party Utility detect the temperature information is from the I/O chip, which will not exactly current CPU temperature". Chaintech is right, it does seem like some third party programs are detecting wrong temperatures (such as SANDRA/Everest H.E. which "detected" 124C). Although I'm still not sure about the reliability of the "fixed" temperatures (60C looks a bit too much for AMD64 3000+ with no O.C.).




Apart from the issues I've mentioned above everything seems to work perfectly fine.





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