Question about EliteGroup 755-A (ECS 755-A) Motherboard

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System booth i bought a new DDR 400 ,512 Mb ram and install it on my pc, when i turned on the my pc, the booth screen bios ok, then when windows is loading up on the screen, it stops and black screen shows on the monitor. It did not load the main windows for my OS..when i restart my pc, I load it on the safe mode, then the pc starts and did not show the black screen..I encounter this problem many times, sometimes my pc booth normally but sometyms not.My motherboard is ECS 755- A2..Is there a problem wid my board..i install the new memory at my frends PC  and it starts normally.

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The ram memory might not be compatible from your motherboard, you should have find it on the list of your motherboard manual. the manual have the list of memory cards' qualified brand. likewise, try to install this to ther slot if the problem still occurs then you may return to your vendor and inform them about the specs and kind of your motherboard and the problem you are encountering so that they will give you the right memory card to use. you can also ugrade your bios thru the internet so that you don't need to return this item.

Posted on Dec 13, 2007


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Posted on Jan 02, 2017


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Got an AsRock P4i65G mobo and bought 2 gig RAM for it. However, I have bought ECC memory by mistake instead of Non-ECC. PC wont boot with the new RAM. Is there any way I can get this to work such as with...

Hi, you can download a manual here:

This ram type is ONLY intended for servers
or mainboards that are compatible for that ram type.

This is what your mainboard supports:

Dual Channel DDR memory technology
- 2 x DDR DIMM slots
- Supports DDR400/333/266 non-ECC, un-buffered memory
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Use only the asrock site when upgrading the bios.
And a bios upgrade does not supports the ecc ram anyway.

Hope this will help you.

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I upgraded my RAM to 1 Gig but it's still showing only 256 meg. Why?

Hi this model sopport 2Gig Memory Ram.

RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM
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Please check in to your Bios system maybe share memory Video or capacity is setting

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If it works fine with one stick of ram. Then it is the ram that is incompatible. You can try different settings but you may end up that the stick isn't compatible. Hope this helps let me know if you have any other questions.
Thank you,

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1 Answer

Ram not working with motherboard


Check if your motherboard only supports only dual channel interleaved memory from the manual because it might be the main issue of your problem. Also DO NOT plug in the 512 MB ram you have over there. If it is ok to have one Slot empty then there should be no reason why it should not POST properly. Before jumping to conclusions that the RAM is faulty. Make sure that you REMOVE any overclocking you might have on the system. Some RAM won't post wihen the CPU clock and multiplier are not standard. Also it could help if you load FAIL SAFE settings in the BIOS until you determine the proper cause of the problem.

Hope that this helps :) (please rate thanks)

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1 Answer


Sorry for the delay in my response.

Your computer will accept a maximum of 1 GB of memory. If both memory modules are the same brand and part number then it is possible that one of the sticks are bad.

Try each 512 MB memory stick in the first memory slot, without installing a second stick. This will troubleshoot to find out if one of the 512 memory sticks are bad. If both check out ok, then the problem is with the video adaptor.

Have you tried adjusting the refresh rate on the monitor as I described in my first response?

My final possible solution would be to upgrade the bios. Below is a link to the webpage for your computer system. You will find links for troubleshooting guides, driver and software downloads, product specifications, etc. If you click on driver downloads, then choose your operating system, you will be directed to a page that should provide the latest ROM (bios) update.

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You will get a check sum error so enter bios to re-set date time and other settings.

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If still doesn't work..just let me know here..

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