Question about Gigabyte GA-945GZM-S2 Motherboard

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How to connect the power supply cables to motherboard?

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JAIN_IT

Posted on Sep 08, 2010

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New GA-990AX-UD3 motherboard will not boot


You really should take that Power Supply, and use it on grandma's computer.

The 8-pin EPS +12 Volt power cable was brought out, to provide more power To the motherboard AND processor.

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

The 4-pin ATX +12 Volt power cable has TWO yellow wires.
Yellow wires are 12 Volt wires. (And two Black ground wires)

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

The 8-pin EPS +12 Volt power cable has FOUR 12 Volt wires.

In the motherboard manual, does it say, "Yes Tom. Go ahead and use a 4-pin ATX +12 Volt power cable. We don't care. We just use an 8-pin EPS for fun."

[ This is an 8-pin PCI Express power cable. Completely different,

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

The motherboard probably uses 150 Watts by itself.
No Ram Memory, no CPU, no fans, etc.

The CPU could use up to 125 Watts of power. Just depends on what AMD, socket AM3, processor you are using.

Now to graphics card's power;
The most Wattage a PCI-Express x16 slot can deliver is 75 Watts.

The most power a 6-pin PCI Express power cable can deliver is 75 Watts.
8-pin EPS +12 Volt power cable? 150 Watts.

When buying a Power Supply you should calculate all components needing power,

http://extreme.outervision.com/psucalculatorlite.jsp

,then buy a Power Supply that has AT LEAST 10 percent more power than needed. Easier on the Power Supply.
Also a computer will NOT use more power than it needs.

10,000 Watt power supply, (Exaggeration ), and the computer only needs about 100 Watts for surfing the internet?

Computer ONLY uses 100 Watts.

Due to the price, the above, and the availability, you should use a 500 Watt power supply at least.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=899123&CatId=1079

http://www.amazon.com/StarTech-6in-Pin-Power-Adapter/dp/B002O21XHQ

Or use it on yours if it has enough Wattage.

Back in the day, the motherboard didn't need to supply that much power to components on it.
More powerful Processors, Ram Memory, and graphics cards, brought the power needed, up.

A 4-pin ATX +12 Volt power cable was added for the motherboard. Then 6-pin PCI Express power cable for graphics cards. Then the 8-pin PCI Express power cable for graphics cards. Lastly the 8-pin EPS +12 Volt power cable.

(Better make sure the Power Supply you have is good, if you wish to use the above power adapter cable. Nothing like having a Power Supply with a weak voltage power rail, and a new build, to pull your hair out on )

http://www.gigabyte.com/products/product-page.aspx?pid=3894#ov


Out of the motherboard manual Page 23,

"With the use of the power connector, the power supply can supply enough stable power to all the components on the motherboard. Before connecting the power connector, first make sure the power supply is turned off and all devices are properly installed. The power connector possesses a foolproof design.

Connect the power supply cable to the power connector in the correct orientation. The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not connected, the computer will not start.

To meet expansion requirements, it is recommended that a power supply that can withstand high power consumption be used (500W or greater). If a power supply is used that does not provide the required power, the result can lead to an unstable or unbootable system."

For additional questions please post in a Comment.

Regards,
joecoolvette

Oct 25, 2012 | Gigabyte Technology GA-990FXA-UD3-...

1 Answer

Computer does not switch on


Hi,
  1. First open the computer and verify the power connections. You may also wish to consider disconnecting the main power cable and reconnecting the power cable to make sure it has not become loose. Also verify the power button cable is correctly connected to the Motherboard.
  2. Replace the power supply with a new power supply.
  3. Replace the motherboard.
All the best

Aug 04, 2011 | Packard Bell Computers & Internet

1 Answer

Where do I connect the SATA power cable to on the motherboard


Only the SATA data cable connects to the motherboard, the SATA power cable is connected to a cable from the Power Supply Unit (PSU) if you do not have any of the SATA power cables on your PSU you can get MOLEX to SATA power cable converters (MOLEX is the "fan power connecters")

Mar 28, 2011 | Intel Motherboard

5 Answers

There is no power switch on the enhance atx 1123b that I have . What actually powers it up?


Just about every power supply I've owned doesn't have a power switch. The power supply is turned on by one of the wires in the 24 pin connector. According to this it looks to be pin 16 and how to turn it on:

"Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF."

Hope this helps

Ray

Mar 01, 2011 | Enhance Technology ATX-1123B, Enhance...

1 Answer

I have a problem with my pc it will not boot up it starts to boot then just turns off I cant get and diag done to troblem shoot the problem PC specs Win XP sp3 3gb ram DDR2 Celeron D...


now, this sort of shut down is difficult to diagnose on remote, i would suggest downloading your motherboard manual beforehand. before you do anything, i would suggest read in manual where is reset pin and how to reset bios to original state, but do not do that yet, it will lost all your mods settings and return m/b - bios to original state. there are several possible causes of that fault.

1. faulty memory stick
2. thermal or fault on power supply
3. thermal or fault on motherboard
4. corrupted bios

we will start with easiest to check re 1.
a. switch off your computer,
b. remove power cable from power supply,
c. remove side wall,
d. remove memory sticks and replace them with known working ones from another computer
e. reconnect power supply and switch computer on, if computer works correctly, you solved your problem and need to replace memory sticks

power supply is not much more difficult re2.
a. switch off your computer,
b. remove power cable from power supply,
c. remove power supply cables from motherboard and all accessories, do not remove power supplly from it's craddle yet
d. connect cables from new power supply to your motherboard and processor fan, connect them to your hdd and cdrom,
e. connect power cable to new power supply and start your computer, if computer run correctly, switch it off, remove old power supply and replace with new one

most tiddly bit... when you arrive here that meant that previous two did not solved your problem, re 3:
a. switch off your computer,
b. remove power cable from power supply,
c. disconnect all cables from your m/b
d. connect power supply to m/b and processor fan
e. connect ps2 keyboard
f. connect monitor if "all in one" m/b, video card and then monitor in any other case
g. insert power cable to power supply
h. switch on your computer
i. acess bios (that is usually done by tapping "delete" key, find in your manual) if possible, if not then:
i1. switch off power supply
i2. remove power cable from power supply
i3. re-set bios (you need to locate reset pins/switch/button on you motherboard in manual)
i3. reconnect power supply cable \
i4. switch on the computer
j. acess bios and set your thermal to 75centigrade or 80 centigrade and 5min
k. close bios saving changes
l. re-boot your computer and leave it for 10min, if computer still run, that will indicate your problem lies elsewhere.

checking auxiliaries:
a. switch off your computer,
b. remove power cable from power supply,
c. connect cd-rom
d. reinstall power cable and re-start your computer
e. allow 10min run and check if computer is still running

switch off. remove cable and connect your hard disk drive, run or switched off? if off, you need to check your hdd...

any other auxiliaries need to be connected again in steps and if finaly you find one which terminated boot up, this meant that this particular element is responcible and need replacing. you need as well consider that your power supply maybe perfect on the bench, but will be too small for load required adn simple upgrade to more powerfull mother board can solve the problem.

hope that half book on problem solving solve yours :-)

Jul 30, 2010 | Computers & Internet

1 Answer

Sata power supply with ide only mother board?


Unlike IDE drive cables, which allow you to connect at least 2 drives to the same cable, SATA cables only allow one connection from motherboard to drive per cable. You can connect as many SATA drives to your motherboard as you have SATA connections.

Mar 25, 2010 | Computers & Internet

1 Answer

Dell 4700c will not power on white light on motherboard


Hi,
Is there any chance for you to check if the power supply blows air from inside of the power supply? If yes, on your motherboard, do disconnect the P1 cable or the main power supply cable that connects to the motherboard and the P2 cable which. and try to plug the power cord of the power supply and if the fan did not spin, power supply is the one causing the problem

You may also try to remove the RAM or memory card module from the motherboard and all of the PCI card connected to the motherboard. Try to turn on the system and check the power supply fan and the CPU fan if it will spin. If not then I recommend you to replace the power supply.

On the other hand, if the fan is spinning on the power supply after you remove all the RAM and PCI cards. And the power button light is flashing amber or solid amber color. Try to install RAM 1 by 1 to isolate the problem.

Let me know if the problem persist

I

Sep 23, 2009 | Dell Dimension 4700C PC Desktop

1 Answer

Power supply


this is infact your video card and it can be the power supply if the burnt cable is connected to ur video card
the monitor is fine but about the burnt cable on your power supply
make sure you buy electrical tape and tape that up as soon as possible because if that burnt cable touches any part of your motherboard or anything else it will instantly fry everything which means damage everything which means ...
on the worst case scenario that has already happened

Sep 26, 2008 | Foxconn 761GXK8MB-RS Motherboard

1 Answer

LAPTOP /no power


It states you are not getting no power on your lap top computer :

No power or computer does not turn on Cause: No power from the computer can be caused by any of the below possibilities.
  1. Connections not connected properly.
  2. Third-party hardware.
  3. Bad power cable.
  4. Incorrect power supply.
  5. Bad battery.
  6. Bad power supply, power button, and/or power board or inverter.
Solution: Note: If the computer is turning on but is not posting (beeping) or giving any type of picture on the display, please see document CH000607. If you are uncertain if the computer is turning on or not, this can be easily checked by locating any fans in the computer or visible from the outside of the computer. If these fans are spinning, the computer is receiving power and this document may not apply to your issue. Connections not connected properly Verify that the power connection is connected properly to the wall and the back of the computer. If the connections appear to be connected properly, attempt to disconnect and reconnection both ends of the cable. If you have a power strip (surge protector) or switch used to turn everything on at once, temporarily disconnect the computer from that switch and connect that cable directly to the wall. This will help verify that the strip or switch is not bad. Verify that the outlet works by connecting a different component to that switch.
Third-party hardware If additional hardware has been recently added to the computer it is recommend that you temporarily disconnect that device or devices from the computer to verify they are not preventing your computer from turning on. Note: If the computer was working fine before you added the new hardware, removing the third-party hardware did not resolve the issue, and the computer is not beeping but is turning on, please see our POST troubleshooting document CH000607.
Bad Power cable Verify that the cable supplying your computer is not bad or damaged by using another power cable. If you have a standard CRT monitor, this cable can be used in place of the computer power cable. If you have a portable computer or laptop, when the cables are plugged into the laptop you should see a power light or battery charge light. If this light is seen, this is a good indication that the power cable is good.
Incorrect power supply If you are building your own computer or if the computer has never turned on since you purchased it, it is possible you are using a power supply that does not supply enough power and/or the incorrect type of power supply. Verify your power supply meets the requirements of your motherboard and processor.
Bad battery If your computer is a laptop or portable computer that utilizes a battery for mobility it is possible that the battery may be causing your issue.
  • If your computer powers on when the cable is connected to the portable computer but not when it is disconnected, we recommend you purchase a new battery.
  • If your computer does not power on when the battery is connected and when the power cable / charger cable is connected, try removing the battery and seeing if the computer can power on with only the power cable connected. If no power is still received, skip to the final section.
Bad Power Supply, power button, and/or power board or inverter If, after following the above sections, your computer still receives no power, it is likely that a hardware component in the computer has failed. It is most likely that the power supply has failed. If you do not plan on replacing the power supply yourself or if you have a portable computer, we recommend having the computer serviced by your computer manufacturer or a local computer repair shop. If you have a desktop computer and plan on trying to repair the computer yourself, we recommend you replace the components in your computer in the below order.
  1. First open the computer and verify the power connections. You may also wish to consider disconnecting the main power cable and reconnecting the power cable to make sure it has not become loose. Also verify the power button cable is correctly connected to the Motherboard.
  2. Replace the power supply with a new power supply.
  3. Replace the motherboard.
Good Luck,Please dont for get to Vote,Thank You

Jan 17, 2008 | Toshiba Satellite M40-S417TD Notebook

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