AMD SB800 PDF

The Southbridge is expected to be available in the first quarter of The new standard also includes updated Native Command Queuing NCQ technology and allows for smaller interface connectors. The latter is useful when designing 1. Because of this, Windows expects motherboard vendors interested in featuring SATA 3 support on their Intel motherboards will turn to third party vendors such as Marvell. SATA 3 drives are expected to hit the market in September of this year and Seagate is expected to be the first storage manufacturer out the door with compatible drives.

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Few seem to have picked up on the fact that we also want our rigs to be as quiet as possible, though. The fan speed controls available in most modern BIOSes are basic at best and often laughably inadequate when compared to the frankly excessive overclocking options being offered. 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. Of the big three, only Asus has made real progress in improving BIOS-level fan speed controls, and it still has a long way to go to match what now-defunct mobo maker Abit was doing more than seven years ago.

Motherboard manufacturers typically rely on SuperIO chips or other auxiliary silicon to adjust fan speeds based on system temperatures. Putting this functionality in the chipset certainly makes sense, but has AMD implemented the sort of functionality enthusiasts might want?

The microcontroller can manage fan speeds using three algorithms: step, linear, and non-linear. In step mode, fan speeds jump from one value to the next as temperatures rise. The linear algorithm smooths things out, allowing fan speeds to ramp, well, linearly between predefined minimum and maximum values. This method drapes a string of linear slopes across multiple step points.

Non-linear mode is just as flexible, allowing users to configure as many slopes as they can steps. In addition to the three algorithms that determine how fan speeds respond to temperature changes, the SB series is governed by single- and dual-sensor policies that dictate how temperatures are interpreted. Single-sensor mode relies on only 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.

Dual-sensor mode is designed primarily for motherboards with passively cooled north-bridge chips that rely on airflow generated by the CPU fan. Why so many? Because the south bridge can monitor and power no fewer than five individual fans.

Each one can have its own profile, and 3- and 4-pin fans are supported across the board. All this functionality is offered for free in every SBseries south bridge, with no additional hardware required. 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.

But none have. Props to Merrikh and AMD for incorporating such powerful fan control support in the south bridge, and shame on any motherboard maker that leaves this particular feature untapped in favor of alternative fan control mechanisms that offer less, well, control. Some motherboards have real basic functionality while some of have been excellent. Glad to see AMD is working on making fan control even better. I think the control theory in this article is week.

This is appalling. I agree that diversity is a very good thing to have, but largely motherboards all seem the same more or less, like video cards. Although video cards are much less diverse, motherboard makers are like the middleman that soaks up money. On a more related note, I was sad to see Abit go under. They were the soul source of all my motherboard purchases for myself for the last 8 or so years. I really loved their fan controls and I looked for it when I switched motherboard makers.

The best I found was DFI, but they decided to sink their flagship as well. They seem fairly cheap for all of the different components.

I remember paying much more for less in the past. And those things do matter. Geoff, would it be possible to get some specs or documentation from your source? People who care about fan controllers already got a dedicated unit that puts any motherboard implementation to shame. The silence crowd avoids fans as much as possible. They do their research and get large, low-dB units.

Maybe if Sapphire gets into the mobo buisness they will implement this. What a shame to have such a great feature going to waste.

The concept of automated fan controllers is a bit strange. So it seems strange to want to control that. A fan controller would just allow a system of be hotter in idle and in return save very little on noise. Checking newegg mm fans I found two mm fans that are loud and move more than cfm most of the other fans are in the 20 dBA and 80cfm or lower ranges.

Among all of those fans only 1 seems good for a fan controller as rps go up to , all others are around or less. There are a lot of fans like this for sale. But there and very few fans for sale that do that. Most products are designed to be effctive and quiet. If there where more fans on the market that need controllers then I think motherboard makers would care about these chipset features.

Using a fan controller makes your pc hotter but quieter. You win in both cases. The chips themselves monitor system temperature and adjust the fans accordingly.

You may be thinking of some GPUs that used to adjust fan speed based on load. Those are largely obsolete though and they were stupid to begin with. I hope that MB manufacturers will start taking advantage of it.

A dinkier CPU fan ought to be the only thing that really calls for dynamic control. Also, those huge fans can increase power draw at the outlet by w, even at low speeds. Nice features not being used on the desktop, wonder if any notebook manufacturers are using them to manage thermals and acoustics. If even one was to make a board that used this functionality, that would have in itself drawn people toward it, and then forced the others to follow suit.

Of course there is. These are motherboard manufacturers. This is very similar to how many-many motherboard makers continue to use external Ethernet PHY chips or full-blown Ethernet controllers sometimes of the PCI connected variety — ugh even though most modern chipsets have fully functional Ethernet controllers including PHYs integrated.

Old habits die hard? Pure laziness? If you leave it up to mobo makers to put controls in the BIOS, they will screw it up more often than not or make a bunch of fancy-looking, nearly useless Windows-only utilites to control fans. It just seems that the industry is bent on having just one high end platform.

Or maybe they are just being business people doing what businesses do and putting resources toward whatever is most profitable? Definitely nice that AMD is building a nice controll into their southbridge. If the logic can be loaded into the southbridge all the better.

I definitely want to be able to set the points on the CPU. Some kinda of options on case fans is enough. I was happy enough with my P5Q Pro which had 2 point linear with adjustable points and preset modes for some of the case fan headers. Less than that disappointing, more would be a bonus. I doubt you will see wide spread implementation until boards start implementing UEFI. By then we could possibly see a revised chipset. Also I notice that the diagrams show a AM3R2 system which is possibly an indicator of when this will be possible.

Guess we will have to just wait for AM3R2 boards to appear. Why are the motherboard makers being so regressive on fan speed control? I am very disappointed with my PUSB3 and its dearth of options on this front.

There are tons of DDR3 modules that require a voltage amount in granularities of. These companies are just shoveling features into the BIOS with no regard to their usefulness.

Of course, the board is more than happy to allow you to set a voltage between 2. And if you are so eager that you are willing to trade a kidney then goto any computer store and buy a fancontroller and you got what you want, and you can even keep it across any new system you might buy later. Hey, are you looking for the point? I went to a lot of annoying adapters and such to wire up all my fans, most are on dumb fat molex power y-cables and use a resistor to be slow and quiet.

Tying up all that extra wiring sucked a big one. Can you get a response from manufactures about why they used this controller? This is why I stopped caring about desktops.

Once the ability to adjust the system bus speed is crippled, that will pretty much be the final nail in the coffin. Ironically, whatever seemingly wonderful idea some fancy new desktop parts have given me in the last year or so always turned out to be something extremely similar to a laptop…just bigger, more expensive, using several times as much electricity, and without a battery.

But fear not, for this is the internets, and now I will just find something new to complain about, like bad laptop screens and dinky batteries! Type search above and then hit Enter. Any halfway-decent motherboard BIOS has more than enough clock and voltage ranges for enthusiasts, and most go above and beyond what even truly extreme liquid-nitrogen-fueled overclockers might require.

This is TR. Single- vs. Source: AMD. Chipsets Cooling Motherboards. Comments closed. Dirge 10 years ago What can I say….

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AMD's SB800 to have SATA 3 support

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. The codenamed "Maranello" platform consists of six-core "Sao Paulo" or twelve-core "Magny-Cours" processors. These two processors support a new socket called Socket G34 with four-channel DDR3 support, with other platform features such as HyperTransport 3. The codenamed "Catalunya" platform consists of codenamed "Suzuka" quad-core processors, featuring Socket AM3 and support dual-channel registered DDR3 memory, the platform supports HyperTransport 3. While in the same internal event mentioned above, AMD gave a preview on the features of the SB8xx family of southbridges, as follows: [5]. The IGP features are listed below:. AMD does not provide any SB8x0 errata publicly.

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