did I buy the wrong RAM

Gigabyte Ga-p55a-ud3 motherboard
March 22, 2010 at 22:34:05
Specs: Win 7 home premium 64
This is my first build so please excuse my lack of knowledge.

I've installed everything, cpu - i7-860 LGA 1156, MOBO - GA-P55-UD3, CPU cooler - Corsair H50, Case - Cooler Master 690 II Advanced, PSU - Corsair 750TX, video - Sapphire Radeon 5750, Memory - Corsair Dominator 2x2 DDR3 1600Mhz.

The LED's flash and the fans go for about 1 second then shut off, then go again for a second then shut off.

i've checked all connections and was careful not to short anything during build.

I now see that the MOBO supports RAM - 2200, 1333, 1066 and 800 - NOT 1600. Is this the problem, please help. Thanks.


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#1
March 22, 2010 at 22:45:21
I now see that the MOBO supports RAM - 2200, 1333, 1066 and 800 - NOT 1600. Is this the problem, please help. Thanks. That pretty much sums it up for the ram, but you could have other problems. You should always bench test the mobo before you put it all together. You can google how to bench test a system.

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#2
March 22, 2010 at 22:58:01
the Ram that I put in is 1.65v and the supported RAM is 1.4v. Do you think I could have damaged the MOBO. Without any RAM installed, the LEDS flash and the fans spin for a second then shut down then flash and spin again, and repeat.

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#3
March 22, 2010 at 23:04:05
sorry, I mean that the RAM I bought is 1.65v and the RAM supported is 1.5v

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Related Solutions

#4
March 22, 2010 at 23:28:13
The cpu fan must be plugged into the cpu fan header, otherwise most recent or fairly recent mboards will shut down in a few seconds.

You must have both the wiring for the female connector for the main 24 "pin" power socket on the mboard, and another female connector for a smaller socket on the mboard, connected from the power supply.

The Radeon 5750 card has a small socket a connector from the power supply must be connected to.

Ram that requires more voltage cannot damage the mboard, the bios / mboard can make other voltages available other than the standard voltage, but the higher voltage ram may not work with the mboard.

Corsair does not list ram for your GA-P55-UD3 , but it lists 1600 ram for the GA-P55-UD3L .

GA-P55-UD3L
http://www.corsair.com/configurator...

If the part number for the modules you got is on the list, Corsair lists them as working with your model.

If the part number for the modules you got is NOT on the list, then there's no way of knowing whether they will work.

Other sites I looked at do NOT list 1600 ram, but the ram they list for GA-P55-UD3 and GA-P55-UD3L appears to be the same.

GA-P55-UD3
http://www.ec.kingston.com/ecom/con...

GA-P55-UD3L
http://www.ec.kingston.com/ecom/con...

http://www.crucial.com/store/listpa...
http://www.crucial.com/store/listpa...

http://www.memory4less.com/ModelSea...

"Without any RAM installed, the LEDS flash and the fans spin for a second then shut down then flash and spin again, and repeat."

That's not normal at all for when no ram is installed. Something else is wrong. Do it do the same thing when ram is installed?

It is easy to test for incompatible ram that has caused your mboard to fail to boot.

Make sure you have a speaker or speakers or the equivalent connected to the mboard so you can hear mboard beeps (see your mboard manual if you need to).
Remove the AC power to the case/power supply.
Remove all the ram.
Restore AC power.
Try to boot.
If nothing else is wrong, you will get no video but you will hear a pattern of beeps that indicate no ram is installed, or a ram problem.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.


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#5
March 23, 2010 at 11:01:07
If you installed this mboard in a used case, MAKE SURE there are no metal mounting posts under the mboard in places where there are NOT screw holes in this mboard. If a metal post is in the wrong place it can easily short things on the underside of the mboard. On most cases you can remove both side panels, and see where the posts are on the back side of the mboard when the mboard has been installed. .
......

Oops - I missed the A in the mboard model.
All references in this post are for Ga-p55a-ud3 .

"I now see that the MOBO supports RAM - 2200, 1333, 1066 and 800 - NOT 1600."

DDR3-1600 ram IS listed in Gigabyte's own tested memory list

DDR3-2200 = PC3-17600
DDR3-2133 = PC3-17066
DDR3-2000 = PC3-16000
DDR3-1800 = PC3-14400
DDR3-1600 = PC3-12800
DDR3-1333 = PC3-10600
DDR3-1066 = PC3-8500
DDR3-800 = PC3-6400
http://www.gigabyte-usa.com/FileLis...
........

Ga-p55a-ud3 - PC3-12800 = DDR3-1600 ram IS listed....

http://www.corsair.com/configurator...
If the part number for the modules you have is listed, it should work fine

PC3-8500 = DDR3-1066
PC3-10600 = DDR3-1333
PC3-12800 = DDR3-1600
some is 1.65v
http://www.crucial.com/store/listpa...
.....

PC3-12800 = DDR3-1600 is NOT listed....

http://www.memory4less.com/ConfItem...

http://www.ec.kingston.com/ecom/con...
.......

"cpu - i7-860 LGA 1156"

The Ga-p55a-ud3 mboard must have bios version F4 in order to support your cpu:
http://www.gigabyte-usa.com/Support...

Same here, part numbers that work fine in blue on the left:
http://www.cpu-upgrade.com/mb-Gigab...


F4 bios update date is 2009/11/20
http://www.gigabyte-usa.com/Support...

Sometimes mboards sit around wherever they're stored for months after the mboard was made. It's quite possible the bios version your mboard has is older / lower than that. Usually that will not prevent the cpu from booting anyway, although it may not have the right label or be running at the proper speed, however, sometimes the computer will NOT boot when the cpu the bios version has no support for is installed, and in that case you, or a computer repair place, have to temporarily install a cpu the present bios version DOES support, flash the bios to a newer version, THEN the formerly unrecognized cpu will be recognized properly.
If the mboard won't boot normally, it is usualy NOT easy to determine which bios version the mboard has - Fx in this case, x being a number - it MAY be on a label on the box the mboard came in or it MAY be on a label on the mboard, but I've never seen either. If there is a date the mboard was manufactured somewhere, e.g. on the label on the box it came in - that's a good clue - if that date is more than a little newer than when a bios update was released, it probably has that bios version.


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