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Previous Next Sort by votes. Blastcakegaming Reputable. Jul 21, 42 0 4, 2. Nov 23, 19, 4 74, 2, White is negative in this case. With most computer wires black would be, but many cases tend to use white when not labeled. Another hint is that all the cables have a white. Positive and negative only matter for the LEDS the PC speaker if you have one would work either way, but would be "out of phase". LEDs do not light up if connected backwards.
Oct 5, 21, 59, 1, This is universal in most electronics except in home electrical where green is almost always used as ground. You must log in or register to reply here. In particular, chipsets and DIMMs were designed to run on 3. Melted connectors were becoming more and more common as these wires overheated under these loads. These higher levels of power are normally necessary in systems using watt to watt or greater supplies. This is a 6-pin Molex-type connector see Figure 3.
It is keyed to prevent misconnection. If your motherboard does not feature a mating auxiliary connector, it probably wasn't designed to consume a large amount of power, and the auxiliary connector from the power supply can be left unconnected. If your power supply is rated at watts or larger, you should ensure that it has this connector and that your motherboard is capable of accepting it.
This eases the load on the main power connector. Power for the processor comes from a device called the voltage regulator module VRM , which is built into most modern motherboards. This device senses the CPU voltage requirements usually via sense pins on the processor and calibrates itself to provide the proper voltage to run the CPU. The design of a VRM enables it to run on either 5v or 12v for input power. Most have used 5v over the years, but many are now converting to 12v because of the lower current requirements at that voltage.
In addition, the 5v already might be loaded by other devices, whereas, typically, only drive motors use the 12v. Whether the VRM on your board uses 5v or 12v depends on the particular motherboard or regulator design. Many modern voltage regulator ICs are designed to run on anything from a 4v to a 36v input, so it is up to the motherboard designer as to how they will be configured. This is because the higher voltage will significantly reduce the current draw.
As you can see, using 12v to power the chip results in only 5. Unfortunately, the standard ATX 2. Pulling up to 8A more through a single 18ga.
This connector is shown in Figure 3. If you are replacing your motherboard with a new one that requires the ATX12V connection for the CPU voltage regulator, and yet your existing power supply doesn't have that connector, an easy solution is available.
Merely convert one of the peripheral power connectors to an ATX12V type. The ATX specification also defines an optional six-pin connector. This connector has two rows of three pins each to provide the signals and voltages. This connector has gone through several revisions in pinout since first being published, and I have yet to see any motherboards or power supplies on the market that actually support it.
The FanM signal enables the operating system to monitor the status of the power supply's cooling fan so that it can take appropriate actions, such as shutting down the system if the fan fails. The motherboard under operating system control can use the FanC signal with variable voltages to control the operation of the power supply's fan, shifting it into a low power state or shutting it off completely when the system is in sleep or standby mode.
The system designer can define intermediate voltages to operate variable-speed fans at various levels. The V pin provides voltages from 8v to 40v to run FireWire peripherals off the bus, and the R pin is a return or ground line for this power circuit. This separate power rail keeps the bus power separate from the system main power to prevent interference. The SFX specification also defines the use of a six-pin control connector, but uses it only to provide a fan control signal on one pin.
The other five pins are all reserved for future use. If you currently own a desktop system made between and from Dell, you will definitely want to pay attention to this section.
A potential booby trap is waiting to nail the unsuspecting Dell system owner who decides to upgrade either the motherboard or power supply in his system. This hidden trap can cause the destruction of the motherboard, power supply, or both! Okay, now that I have your attention, read on As those of you who have attended my seminars or read previous editions of this book will know, I have long been a promoter of industry-standard PCs and components and wouldn't think of purchasing a desktop PC that didn't have what I consider an industry-standard form factor motherboard, power supply, and chassis ATX, for example.
I've been down the proprietary road before with systems from Packard Bell, Compaq, IBM, and other companies that used custom, unique, or proprietary components. For example, during a momentary lapse of reason in the early '90s, I purchased a Packard Bell system.
I quickly outgrew the capabilities of the system, so I thought I'd upgrade it with a new motherboard and a faster processor. It was then that I discovered, to my horror, that LPX systems were not an interchangeable standard. Because of riser card differences, virtually no interchangeability of motherboards, riser cards, chassis, and power supplies existed.
Suddenly, the money I thought I had saved when initially purchasing the system paled in comparison to what I'd now have to spend to completely replace it. Lesson learned. After several bad upgrade and repair experiences, I decided never again would I be trapped by systems using proprietary or nonstandard components. By purchasing only systems built with industry- standard parts, I could easily and inexpensively upgrade, maintain, or repair the systems for many years into the future.
I have been preaching the gospel of industry-standard components in my seminars and in this book ever since. Of course, building your own system from scratch is one way to avoid proprietary components, but often that route is more costly in both time and money than purchasing a prebuilt system. And what systems should I recommend for people who want an inexpensive prebuilt system but one that uses industry-standard parts so it can be inexpensively upgraded and repaired later?
In fact, those are really the three largest system vendors that deal direct, and they mostly sell systems that use industry-standard ATX form factor components in all their main desktop system product lines.
Or so I thought. It seems that when Dell converted to the ATX motherboard form factor in mid, it unfortunately defected from the newly released standard and began using specially modified Intel-supplied ATX motherboards with custom-wired power connectors.
Inevitably, it also had custom power supplies made that duplicated the nonstandard pinout of the motherboard power connectors. An even bigger crime than simply using nonstandard power connectors is that only the pinout is nonstandard; the connectors look like and are keyed the same as is dictated by true ATX.
Therefore, nothing prevents you from plugging the Dell nonstandard power supply into a new industry-standard ATX motherboard you installed in your Dell case as an upgrade, or even plugging a new upgraded industry-standard ATX power supply into your existing Dell motherboard. For the others, generally I think colour is positive, white is negative. For the connections you have listed, you will not damage your system if you connect them up backwards; the lights simply won't work. In most motherboard cables there is a little triangle that marks the positive side.
See the picture below:. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Asked 11 years, 6 months ago. Active 1 year, 9 months ago. Fortunately, most PC cases feature a single-block plug for all front audio connectors, whether that includes jacks for headphones, audio inputs, or even microphones.
These cooling devices help increase airflow in and out of the case, and they keep your PC cool. Most boards automatically control the fan speed and keep your PC running as quietly as possible. If your fans have three- or four-pin connectors, which is almost always the case, they connect directly to the motherboard. These fans are usually the type that offers automatic speed control. Older PCs had two-pin plugs and ran at a constant speed. Three-pin connectors can plug into four-pin ports and vice versa.
The processor fan is the most crucial connection of all, maintaining a safe temperature for the CPU at all times. Check your manual for its location. The plug is likely to be a four-pin connector, but three-pin processor fans also exist.
The connector only goes one way. Similar to the cables you had to plug in earlier, the location to insert them into will be labeled.
Once everything is connected correctly, ensure that the cables are secured and lying in a safe place.
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