Solved Crashing on 4 GB RAM

September 26, 2011 at 09:09:30
Specs: Windows 7 64bit, intel core 2duo 2.4ghz
So i'm installing two 2GB ram on my asus P5N-MX, but whenever i do so, i always freeze and eventually crash the system. so i tried using only one of each on each slot and seems to be working fine.

it also says i can only use 3.25 GB of ram when i have both sticks installed

ram im installing are 2 800 mhz pc26400 ddr2

i am also running a 64-bit win 7

do i need to do something else to make this work?


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#1
September 26, 2011 at 10:48:15
✔ Best Answer
If you have a 1066MHz FSB CPU, you should be running the RAM at 533MHz anyway. And if you check the specs, your board only "officially" supports RAM to 667MHz. To run the RAM at 800MHz, you must overclock:

http://www.asus.com/Motherboards/In...

As for the difference in the memory amount, the board has onboard video so if you've never installed an actual video card, a portion of the system memory is being used for the graphics. I suggest you read your manual. You should also test the RAM with memtest86, memtest86+, or Windows Memory Diagnostic.


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#2
September 26, 2011 at 11:04:27
i dont really want to overclock since this is kinda old pc, 3 years i think.

so its either get new ram at 667mhz or get a new board ...

can you reccommend something thats cheap but good since im short on cash right now


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#3
September 26, 2011 at 11:50:06
If you are letting the BIOS auto detect the RAM speed and the sticks are different, you must install the RAM with the slower specs in the first slots. Also, if the RAM has different voltage requirements you will most likely have issues with stability.

You don't need to replace the board. Just enter the BIOS before installing the second set of RAM and set as riider has suggested above. You should be able to under clock the RAM.

You may need to read your board manual to learn how to set the RAM speed manually.


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Related Solutions

#4
September 26, 2011 at 13:28:19
"only use 3.25 GB of ram" THIS is normal.

You can put in better ram (as in speed) without any issues.

Your problem is your ram is either set wrong in bios or faulty ram or controller or motherboard.

Test it with memory tests.

1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.


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#5
September 27, 2011 at 05:15:26
"so its either get new ram at 667mhz or get a new board ..."

No, I didn't say either. I said, "If you have a 1066MHz FSB CPU, you should be running the RAM at 533MHz". Do you have a 1066MHz FSB CPU? If you do, go into the BIOS & set the RAM to run at 533MHz.

I also recommended that you "test the RAM with memtest86, memtest86+, or Windows Memory Diagnostic." You can find memtest86 or memtest86+ by using Google. Windows Memory Diagnostic is built into Win7. Here's how to run it:

http://mintywhite.com/windows-7/7ma...

Also, you didn't state whether you have a video card or you're using the motherboard's onboard video. If you're using the onboard, check the BIOS setting to see how much memory is being allocated to the graphics.


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