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

When you plug in the power cord is there any lightswhatsoever on the laptop, where the plug goes in or on the AC Adapter of thepower cord?

When you press the power button do you hear fans running, hard drive spinning,lights on the computer, hear any beeps or lights constantly blinking, hear theDvD/CD drive click and the light on the drawer of the DvD/CD turn on for asecond or two? If so the laptop is trying to boot or may have booted, butthe screen is not showing for some reason.

Beep tones and blinking lights tells the technicians what is going on with thelaptop and why it is not booting. Most times it's a motherboard issuewhen you hear beeps or blinking lights continuous. Most times the problemis with the memory or Video Card. Count the Blinking Lights or Beeps and takenote of their pattern (1 Long or 1 Long followed by 2 Short).

Maybe your power cord is bad if you don't get anything to happen whatsoeverwhen you press the power button. And if that's true maybe you wasoperating off the battery the last time you had it on and since the power cordis bad, it was not charging the battery so the battery is drained and the powercord is bad.

Maybe you have a Static Charge Buildup. Remove the Power Cord, Remove theBattery, then Press and Hold the power button for 30seconds. After 30 seconds plug the power cord back in (leave the batteryout) and hit the power button to see if it boots. If it does, you can putthe battery back in and let it charge.Maybe your DC Power Jack which is where the power cord plugsinto the computer is bad. Take an ink pen and push the tip inside thejack and see if the little pin wiggles, if so the jack is bad. You'll have totake the laptop apart to fix it. Most times it is soldered onto themotherboard, so you will have to desolder the old and solder a new one.Maybe your memory is bad or the memory slot is bad.Remove the Power Cord, Open the Case and remove one of thememory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x onit with an ink pen. If it fails to boot then move the chip to the nextmemory slot and try rebooting. If it fails take the chip out and set itaside, then put the other chip in and try booting it in both slots. If itboots, just to verify that the chip set aside is bad, mark an x on it and putit into the open memory chip slot and try booting.

no this is not normal

Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your "((motherboard to your hard drive))" make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error hope this helps

On the motherboard, connect all power connectors,video(if you have intergrated video at this time I would just use that),cpu,cpu fan,one stick of ram. Nothing else, you can connect the front panel power-on button just to make it easier to turn on. When you have all the basics connected try to turn it on and see if BIOS comes up and the beeps go away. Do not connect HD,USB,or any thing else. If you get the same thing , swap the stick of ram with another stick. IF you get BIOS , one at a time start connecting other components and starting the system back up to make sure it boots normally. If still no chage, then it lies in your power supply , cpu, motherboard(although I know you said it's new they do at times come D.O.A).

You can use only 2 pcs Ram not 3 pics because you not mantain channel

please load windows xp 64 bit . it will work well.
also check the temperature of motherboard and processor in bios
if temperature high use good heat sink and cpu fan .

i think the cpu may have a problem with the board or the memeory. either its bad, damaged or incompartible with your system. try out another cpu

Hi sebaswis, am I correct that this Gigabyte GA-7VRX is a replacement MB? (I read your other posted questions). http://www.fixya.com/support/t1399506-computer_boot_when_power You mentioned you put your old system back together & it worked fine. If mother board is shorted to the system case you will see the CPU fan spin for a second. Most motherboards use a green led which represents there is stand-by power running to the board.(This is normal). I am unsure why your led is orange. (Its not mentioned in your manual & manual does not show the led?s location). Was the other GA-7VRX MB led always orange or was it also green? Suggest you disassemble the heat-sink from the CPU. You mentioned you installed a new XP 2500+ CPU. If a pin on the CPU was bent during installation of CPU into the socket or if no thermal grease was applied or too little to the top of CPU, either would give you: CPU fan spins for a second & nothing else seems to run. Look over the link provided below. It is a guide to how to install a motherboard. (You may not need this but Its worth going over all the steps). http://www.hardwaresecrets.com/article/145 As far as the power supply. If the MB's are the same (GA-7VRX) & the old system ran with 220W, the newer one should also function. Clarify these questions for me sebaswis. Mike

It sounds as if the motherboard is having a temperature safety shutdown. This occurs when the temperature of the CPU exceeds a certain limit.

First off: Please check your CPU fan, power supply fan, and graphics card fan(if you have a gfx card) that they are working. If not, I would highly recommend replacing the fans or at least cleaning them and attempting to get them started by rotating them manually.

Please enter your BIOS (See Here for instructions) and navigate to "PC Health Status" - check the entry for the CPU temperature. While in the BIOS there is little strain on the system, but if the temperature is above 40 degrees Celsius in this state it may be prudent to check the fan setting. Also, check if there is a CPU Fan fail warning/CPU warning temperature - on average the limit should not exceed 60-65 degrees Celsius, max. Set any Fan speed or mode settings to maximum if able.

Try again.

If problem persists, and you are sure the temperature is not too high and/or the CPU fan is working, it may be the power supply itself. It is possible for the power supply to shut itself off in extreme cases such as when a power supply's fan stops working, and the temperature of the power supply rises to an unsafe level. Sometimes the fan will work initially but quit after a certain time. The fan requires replacement if this is the case.

Let the computer sit for a while and check to make sure it is at or near room temperature. Attempt to restart the installation process. When the power is cut, feel where the power supply meets the case to check whether or not it is particularly hot.

Replacement of the power supply's fan should solve that problem. I recommend taking it to a repair shop.

If that is not the problem, a last resort is that the harddrive is overheating and causing a system crash. With the case open, start the computer (mindful to be careful and always touch a large metal object such as the computer case itself before getting your hands near any components to prevent static damage), and wait for it to crash. Place your hand gently on the harddrive. If it is very warm or hot to the touch, most likely the harddrive's actuator arm, circitry, or data plate is malfunctioning and the drive should either be taken to be repaired or replaced.

If none of the components in your computer are particularly hot, please come back with more information on your computer, such as the parts, what you are cd you are booting, any new hardware, etc.

sounds like the motherboard died.