AMD Southbridge SB chips to include built-in Serial ATA 3 support. AMD’s SBseries fan speed controller exposed. Options aplenty make this motherboard reviewer swoon by Geoff Gasior — AM on. I’ve been a big fan, pun intended, of fan control options in the BIOS. Some motherboards have real basic functionality while some of have been excellent.

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The linear algorithm smooths things out, allowing fan speeds to ramp, well, linearly between predefined minimum and maximum values. In fact, I’d wager that most of us would happily trade the ability to tweak obscure memory timings and system voltages for such robust fan control functionality.

That’s a travesty, because this is exactly the sort of fan speed control that I’m sure many an enthusiast would love to have in his motherboard’s BIOS. LG HU85L projector needs but two inches to sb00 a 90″ picture. In step mode, fan speeds jump from one value to the next as temperatures rise.

Motherboard makers need only to connect fan and diode traces to the south bridge and implement the necessary BIOS hooks to give users access to fan control variables.

The chipset series is targeted in three markets: Webarchive template wayback links Articles with Japanese-language external links. MSI’s fan speed controls remain limited but continue to offer at least some tuning options, while Gigabyte’s are still shockingly nonexistent. Putting this functionality in the chipset certainly makes sense, but has AMD implemented the sort of functionality enthusiasts might want?


Because the south bridge can monitor and power no fewer than five individual fans. Motherboard chipsets List of AMD chipsets. Advanced Micro Devices chipsets. By using this site, you agree to the Terms of Use and Privacy Policy. AMD’s Ali Akbar Merrikh, the man who designed the fan speed controls and patiently answered my questions about them, isn’t aware of any motherboard that exploits the SB’s fancy fan controller outside the company’s own boards and reference designs, none of which are available to consumers.

Instead of being limited to single high and low values, AMD’s step mode can accommodate no fewer than eight predefined fan speeds and corresponding temperatures. All this functionality is offered for free in every SBseries south bridge, with no additional hardware required. Current information about the chipset series is very scarce, while the officially published information about the series is the server chipsets with two variants available, the AMD S chipset and the AMD S chipset, all of them paired with the SBS series southbridge.

AMD sockets and chipsets. AMD chipset series. Each one can have its own profile, and 3- and 4-pin fans are supported across the board.

AMD’s SB800-series fan speed controller exposed

Most OSes require patches in order to work reliably. Merry Christmas from The Tech Report staff! Zmd, imagine my delight when, at AMD’s Technical Forum in Taipei last week, I came across a presentation on the fan speed controls enabled by the company’s current generation of south-bridge chips.


PC enthusiasts have always had a bit of an obsession with maximizing performance, so it’s no surprise motherboard makers have lavished us with a wealth of overclocking and performance tweaking options.

Customize The Tech Report There’s plenty of granularity, too.

AMD’s SB to have SATA 3 support –

Dual-sensor mode is designed primarily for motherboards with passively cooled north-bridge chips that rely on airflow generated by the CPU fan. I went off on a bit of a rant on the subject more than a year and a half ago, and little has changed since.

Few seem to have picked up on the fact that we also want our rigs to be as quiet as possible, though. From Wikipedia, the free encyclopedia.

Views Read Edit View history. Single-sensor mode relies on a,d one temperature sensor, while the dual-sensor scheme takes in two inputs and will set the fan speed based on the higher of the two.

The IGP features are listed below:. Retrieved from ” https: In those cases, the thermal diode built into AMD’s north-bridge silicon can be used as a secondary temperature input.