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PCI slots

Most ATX motherboards provide at least four PCI slots for expansion. Although these standard PCI slots for expansion cards usually available, such as sound cards and Ethernet cards are faster PCI Express (PCIe) also appear on most boards public. PCIe distinguish between them, but the number of links or channels, they claim. For example, one PCIe x16 offers greater bandwidth of a PCIe x1 slot. (can only transmit one channel 2.5 Gbit / s in each direction.) Therefore, PCIe x16 graphics cards use as an Ethernet card can use x1. All expansion cards that you use, you must, be compatible with the specific slot types, of course.

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M3A770DE 4 pin


Due to the 'large expanse' of information you posted I can barely contain myself.

1) 4-pin ATX +12 Volt power cable, that plugs into the motherboard,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

Note that this power cable has TWO Yellow 12 Volt wires.

Back in the day there was no additional power cable needed, for the motherboard.
When the Intel Pentium 4 came out, the 4-pin ATX +12 Volt power cable came out also.

Power for the Processor.

More, and more powerful hardware components for the motherboard, (Processor and graphics card), required more power to the motherboard.

The 6-pin PCI Express power cable was brought out,

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress

This power cable was used to connect directly to a graphics card, and provide power to it.

Note that this power cable has THREE Yellow 12 Volt wires.
It can carry up to 75 Watts of power.

Still wasn't enough power TO the motherboard, and TO the graphics card, with the new hardware component technology being brought out.

The 8-pin EPS +12 Volt power cable was brought out,

http://www.playtool.com/pages/psuconnectors/connectors.html#eps8

Note that this power cable has FOUR Yellow 12 Volt wires.
Is capable of providing up to 150 Watts.

A PCI Express x16 slot is capable of providing 75 Watts.

Note the shape of the sockets in the connector.
Now compare to an 8-pin PCI Express power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress8

DO NOT confuse the 8-pin EPS +12 Volt power cable, with the 8-pin PCI Express power cable.
They are NOT the same.

The 8-pin EPS +12 Volt power cable's connector on the motherboard, is at the top left corner of the Processor socket, and close to the outside edge of the motherboard.

(With motherboard installed in computer case)

You can use the motherboard with just a 4-pin ATX +12 Volt power cable.

Look at the LOCK on the side of the 8-pin EPS +12 Volt power cable's connector.

With that Lock AWAY from you, or on the opposite side of the connector, a 4-pin ATX +12 Volt power cable plugs in on the RIGHT side.

If you have a powerful graphics card installed in your
PCI Express x16 -> slot/S, you had definitely better use a Power Supply that has an 8-pin EPS +12 Volt power cable.

This is a 4-pin standard Peripheral power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral

Misnomered as a 'Molex' power cable.
{ Molex was the first to design and produce this style of power cable CONNECTOR. The name stuck. Kind of like calling an open-end wrench a Crescent wrench }

IF you use an adapter power cable; Use TWO 4-pin standard Peripheral power cables!!
You need those Yellow 12 Volt wires.

What will happen if you do not use two?

1) The PCI Express x16 slot/s will burn.

2) The gold plated contact pins on the PCI Express graphics card, or cards, will burn.

3) If the graphics card, or graphics cards, require a power cable connected to them;
A) The connections on the graphics card for the power cable will burn.

B) The power cable connector will burn.

Other than that the only other 4-pin references on the motherboard, that I can see, is the optical drive's 4-pin audio cable connector on the motherboard, (CD1), and the CPU (Processor) Fan 4-pin connector on the motherboard.

For additional questions, or if the above is not what you seek, post in a Comment.

Regards,
joecoolvette

Oct 08, 2012 | Asrock M3A770DE ATX AM3 AMD770 DDR3...

1 Answer

how do i know were to put and how manny power cables i need too insert on msi 990fax-gd65


Let's take a look at the MSI 990FXA-GD65 motherboard, and I will tell you, AND show you;

http://www.msi.com/product/mb/990FXA-GD65.html

To the right under the bold heading - AMD 990FX chipset based,
there are views of the motherboard.
I would like you to click on the second from the Left view.
(Shows a Top view of the motherboard) It is turned to the Right.

Turn the view 90 degrees to the Left, and this is how it will be sitting in your computer case.
If you move your mouse cursor around on the view, you will see a magnified view of what the mouse cursor is on.

I will do better than this in a moment, and you will download the Motherboard Manual.

A) Requires a 24-pin ATX main power cable. The connector on the motherboard has a Locking Tab.
The power cable's connector has a Lock with a hooked end.

To ENSURE the power cable is plugged in tightly to the motherboard, the hooked end of the Lock, MUST be over the tab on the motherboard connector,

Basic example of a 24-pin ATX power cable, and it's respective connector on the motherboard,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

In the photo on MSI Support, the 24-pin ATX main power cable connector on the motherboard, is on the bottom of the motherboard under the Blue, and Black ram memory slots. It is Black in color.

B) Requires an 8-pin EPS +12 Volt power cable. This power cable provides the 12 Volt power needed for the motherboard.
(DO NOT confuse it with an 8-pin PCI-Express power cable. More on this later)

On the motherboard JPWR2 should be printed next to it.
In the MSI Support view, it is at the top RIGHT corner of Military Class.
Black in color, 8 socket holes.

Basic example of an 8-pin EPS +12 Volt power cable, and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#eps8

The 8-pin EPS +12 Volt power cable was brought out, to replace the 4-pin ATX power cable.
The Yellow wires you see are 12 Volt wires.

The 4-pin ATX power cable has TWO Yellow 12 Volt wires. (And two Black ground wires)
The 8-pin EPS +12 Volt power cable has FOUR Yellow 12 Volt wires.
(And four Black ground wires)

As more power was required from the motherboard, the 8-pin EPS +12 Volt power cable was brought out, to replace the 4-pin ATX power cable.

C) IF, you are using a graphics card, the motherboard requires a 6-pin PCI-Express power cable ALSO.

This power cable provides more power, to the motherboard's PCI-Express x16 graphics expansion slots, (2)

[ To regress for a moment, you have TWO PCI-Express x16 graphics expansion slots, and TWO PCI-Express x1 expansion slots.

The PCI-Express x16 expansion slots are used for a graphics card.
The PCI-Express x1 expansion slots are NOT. They do not require additional power, either ]

NOTE*
1) IF, your graphics card requires an additional power cable plugged into it, USE IT.
Even with a 6-pin PCI-Express power cable plugged into the motherboard.

2) IF, you do not have the additional power cable, from your Power Supply for your graphics card, AND are using a power adapter cable TO the graphics card, make SURE you use the required amount of 4-pin Peripheral power cables, to that power adapter cable.

Look at a 4-pin Peripheral power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral

You will see it has ONE Yellow 12 Volt power wire. (Red is 5 Volts, Black wires are Ground wires)

Using a 4-pin Peripheral power cable TO 6-pin PCI Express power adapter cable, the 6-pin PCI Express power cable requires TWO Yellow 12 Volt wires,

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress


Short solution?

A) You have to have an 8-pin EPS +12 Volt power cable.
B) Use a 6-pin PCI Express power cable also, if you are using a graphics card.
C) Use the power cable/s needed for the graphics card, IF it requires one.

On the first link above to the MSI Support website, hover your mouse cursor on the Downloads tab.
In the drop down list that appears, left-click on - Manual.

Drop down to the bottom file, and left-click on the blue - E7640v3.2.zip
This is a Zip file. After you click on the file name (E7640v3.2.zip), a small window will come up on the right.

Click on Save File. In the small window to the left that comes up, write down the wording at the top. This is where the zip file will download to.
Desktop, or My Documents, or Downloads.

[ If you are using a computer with Windows 7 on it, it is
Desktop, or Documents, or Downloads ]

Go to where the file is, DOUBLE-click on it. On the far left side click on
Extract all files. Then click on Next, Next, and Finish.
In the last window DOUBLE-click on the file name. (Next to the Adobe PDF icon)

For additional questions please post in a Comment.
Regards,
joecoolvette

May 25, 2012 | MSI 990FXA-GD65 - Motherboard - ATX -...

1 Answer

what are the three expansion bus slots that are found on the mainboard?


  1. 1 x PCI Express x16 slot, running at x16 (PCIEX16) (Note 4)
  2. 1 x PCI Express x16 slot, running at x8 (PCIEX8) (Note 4)
  3. 3 x PCI Express x1 slot (All PCI Express slots conform to PCI Express 2.0 standard.)
  4. 2 x PCI slots
(Note 1) Due to Windows 32-bit operating system limitation, when more than 4 GB of physical memory is installed, the actual memory size displayed will be less than 4 GB.
(Note 2) The DVI-D port does not support D-Sub connector by adapter.
(Note 3) Simultaneous output for DVI-D and HDMI is not supported.
(Note 4) For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIEX16 slot. The PCIEX8 slot shares bandwidth with the PCIEX16 slot. When PCIEX8 is populated with a PCI Express graphics card, the PCIEX16 slot will operate at up to x8 mode.
(Note 5) Whether the CPU/system fan speed control function is supported will depend on the CPU/system cooler you install.
(Note 6) Available functions in EasyTune may differ by motherboard model.

Feb 23, 2011 | Gigabyte GA890GPAUD3H AM3 Socket 890GX ...

3 Answers

wha t is a pci


Conventional PCI (part of the PCI Local Bus standard and often shortened to PCI) is a computer bus for attaching hardware devices in a computer. These devices can take either the form of an integrated circuit fitted onto the motherboard itself, called a planar device in the PCI specification, or an expansion card that fits into a slot. The name PCI is an initialism formed from Peripheral Component Interconnect. The PCI Local Bus is common in modern PCs, where it has displaced ISA and VESA Local Bus as the standard expansion bus, and it also appears in many other computer types. Despite the availability of faster interfaces such as PCI-X and PCI Express, conventional PCI remains a very common interface.

The PCI specification covers the physical size of the bus (including wire spacing), electrical characteristics, bus timing, and protocols. The specification can be purchased from the PCI Special Interest Group (PCI-SIG).

Typical PCI cards used in PCs include: network cards, sound cards, modems, extra ports such as USB or serial, TV tuner cards and disk controllers. Historically video cards were typically PCI devices, but growing bandwidth requirements soon outgrew the capabilities of PCI. PCI video cards remain available for supporting extra monitors and upgrading PCs that do not have any AGP or PCI Express slots.

Many devices traditionally provided on expansion cards are now commonly integrated onto the motherboard itself, meaning that modern PCs often have no cards fitted. However, PCI is still used for certain specialized cards, although many tasks traditionally performed by expansion cards may now be performed equally well by USB devices.

Jan 18, 2010 | Intel D845GVSR Motherboard

2 Answers

can i


you can replace it if its not an onboard video card if its on board you can just add a grpahics card.

Feb 14, 2009 | ZT Group Cisnet A7020 PC Desktop

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