is the ram damaged?

June 9, 2011 at 13:38:56
Specs: Windows 7
After spraying my pc with a pressured air can and doing the forbiden mistake to hold the can upside down my pc wouldn't boot with 4 ram sticks. When i took them out I show that the green colour of one of the sticks was different than the others, like brown-green (one of the other sticks is exactly the same model but still has a nice bright green colour) . Is it an indication that this is the problematic stick? memtest86+ shows no problems to any of the sticks and all of them work when they are 3. The problem is when i put all 4 of them, even if the pc boots i can tell something is wrong with them. Ram sticks are kingston and transcend, 1gb ddr2

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#1
June 9, 2011 at 14:20:42
Sounds like you have some sort of corrosion on one of the modules.

Try snapping each of the modules in and out 4 or 5 times to burnish the contacts. Did you see any frost form when blowing out the case with the canned air?


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#2
June 9, 2011 at 14:53:08
yes when I sprayed with the can upside down something like frost came out. You mean corrosion on the one with the different green colour?

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#3
June 9, 2011 at 15:32:43
If the propellant came out too fast (upside down) it could have frozen the module. I don't know if that would damage it or not.

Just try snapping each one in and out 4/5 times.


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Related Solutions

#4
June 9, 2011 at 17:10:58
Double data rate ram fails like that.

"The problem is when i put all 4 of them, even if the pc boots i can tell something is wrong with them. Ram sticks are kingston and transcend, 1gb ddr2"

Could it be that memtest is not showing the correct amount of ram?

Could it be that you have an old or outdated memtest or not using settings like ecc?

Be sure to check that the correct amount of ram shows.

It is possible that some part has drifted and you need to re-match up parts to OEM spec'd.
Are they mis-matched to begin with?
Set bios settings correctly for the ram or the lowest settings.

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
June 9, 2011 at 20:33:09
if all the sticks work when running only 3 at a time, then it sounds like they are all ok, have tried your 3 stick in all slots ie 123, 234, 134,124, this will help check if you have a bad slot.
even if the pc boots i can tell there is something wrong... in what way can you tell, are you getting freezes? bsod's?
how does all 4 sticks work in safe mode?

i hate computers!
but cant help myself....


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#6
June 10, 2011 at 06:47:16
I tried snapping them in and out but nothing changed. I ve set the bios correctly and i use the newest version of memtest86, but on ECC it has something like "off" when its performed i dont know how i can change that. I ve tried the modules in several combinations, but i can see the problem only when all 4 are in. I can tell there is a problem because:
1) the pc wont recover from sleep
2) temps are getting higher i all parts
3) the windows experience index shows 5,6 for the ram while it used to be 5,8 with the 4 modules
I was hoping the answer would be that the module with the changed colour is probably damaged and i need to replace it but thats not really the case right?


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#7
June 10, 2011 at 06:48:35
and its also slow when it has all 4 sticks in, i forgot that which is the most important!

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#8
June 10, 2011 at 06:53:32
So you have ECC RAM? Did you try using this version of memtest?

http://www.memtest.org/

If you have two different brands of RAM you need to use them in pairs for dual channel to work and if using the Auto settings you need to install the slower set using the #1 slot.

Usually either RAM is good or not. I think you have something else going on.

Have you checked the capacity of each module? Not sure if memtest would pick up on a dead chip on the module or not but if a dead chip exists on one of the modules it would be indicated by short capacity for that module.

Download SIW free and use it to view the SPD information on the RAM. That may tell you something. At least it should show which pair is faster. Get SIW at the link below.

http://www.gtopala.com/siw-download...


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#9
June 10, 2011 at 07:15:34
all 4 modules are 800 mhz and i put them on 667. I dont think i have ecc ram. i always put the pairs so that dual channel is enbled and all mem tests so the capacity as it should be 4092 or something gor 4 gigabytes.
module 1 and 2
DDR2
Size 1024 MBytes
Manufacturer Transcend Information
Max Bandwidth PC2-6400 (400 MHz)
Part Number JM800QLJ-1G
Serial Number 00001E6C
Week/year 32 / 07
SPD Ext. EPP

and of 3 and 4(the 4th is the one i suspect and not use right now)
Type DDR2
Size 1024 MBytes
Manufacturer Kingston
Max Bandwidth PC2-6400 (400 MHz)
Part Number 99U5315-046.A00LF
Serial Number 3309D043
Week/year 09 / 11
SPD Ext. EPP


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#10
June 10, 2011 at 08:00:07
Is that memory slot 1&2 also? Is your pairing on the board 1&2 or 1&3?

Did you try installing just the suspect stick in the #1 slot and running memtest then? Let it run more than one pass.

Kingston RAM is guaranteed for life so you can get an RMA number and Kingston will replace the module. Not sure if it is worthwhile, considering the price of shipping and the price of a replacement stick.

You have an odd situation there, that is for sure.

As far as the Windows performance rating goes, were you always running the RAM at 667 or on Auto?


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#11
June 10, 2011 at 08:22:43
I ll try doing the memtest many times with the suspected module. I 'd be more than happy to buy a new one if i knew it is the one causing the problems.
Im running at 667 since I bought the two extra modules cause my motherboard wont run it at 800 with all slots filled (its a common problem with this motherboard so no issues there)

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#12
June 10, 2011 at 08:34:54
Did you try the suggestion in #5 above. If you determine the slots are all good then it comes down to the one deficient module.

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#13
June 10, 2011 at 10:52:17
I am trying many different configurations right now. I 'll post again as soon as I figure out whether everything works in every slot with every possible combination..

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#14
June 10, 2011 at 12:44:12
If you put in 4 and it fails then either get new ram or new board or both.

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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#15
June 11, 2011 at 05:27:22
I tried every module on its own in one slot and did some tests like seeing whether the pc can sleep and wake up or recalculating the windows experience index. They all had pretty much the same results and did sleep and wake up normally. With the suspected module the test took longer but the results were normal. Then i tried every pair in dual channel in both slot-pairs and did the same tests. Everything was also ok. And then I put all 4 in, it now boots normally, sleeps and wakes up. The windows experience still says 5,6 instead of the 5,8 it used to, I have the impression that things are running a little slower,for example programms take a little longer to open, without it being very obvious and the only thing that shows me something is wrong is that sometimes when i open a browser like google chrome for some reason it shows the site in a small part of the window and the rest is black. It gets fixed by reopening chrome.
I still think there's something wrong here, but since its not likely to find exactly what it is and fix it I guess right now I can stay with things as they are.

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#16
June 11, 2011 at 08:00:41
You are running Windows 7. There are some neat features in 7. One is the way repair works. Without getting into it too much I suggest you read up on it. If there is something wrong it may identify it and fix it.

If something is/was hinky with that RAM stick it could have produced a minor corruption to the OS. You know the addage "garbage in/garbage out.

Some things you can try. Run Chkdsk and SFC/scannow. See the links below.

http://answers.microsoft.com/en-us/...
http://support.microsoft.com/kb/226...

http://support.microsoft.com/kb/929833


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#17
June 11, 2011 at 08:34:16
Ok, I ll try them too. Another option I was thinking is leaving it with 3 modules, it was working ok like that. Then I would lose the dual channel, but is that very important?

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#18
June 11, 2011 at 09:15:44
Dual channel is about increasing the memory bandwidth. If the task at hand doesn't need more bandwidth then it is of no benefit. There are circumstances when is will be of benefit.

Try it for a bit and see if there are any bottlenecks. Again, this seems weird to me. I can't figure what could be wrong with that stick and still be working/showing full capacity.


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#19
June 11, 2011 at 10:45:02
Could you tell me what kind of circumstances that could be? I removed the module and things seem to be running better, I havent tried doing something very intense though..

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#20
June 11, 2011 at 15:17:18
You got it above. Any operation that is memory intense.

I did a quick review of this thread and don't see your specs. In some cases there is no benefit to dual channel because the processor speed can't outrun the RAM. That is an oversimplification but makes the point.

You are over thinking things. If your performance is noticably slower then buy a dual channel kit. If your board can handle it you could get a kit with 2-2GB sticks. If your board can't handle more than 1GB per slot then you could get either a 2x512MB kit or a 2x1GB kit.

All 32 bit OSes can only handle 4GB of RAM and due to OS overhead you will only see maybe 3.5GB usable, even less if you have on board graphics using some system memory. So 3GB is a good compromise unless the cost difference is nominal.

Look below.

http://www.newegg.com/Product/Produ...

One thing I didn't mention before. JEDEC standards for DDR2 is 1.8V. However, many makers juice thier RAM and use higher voltages. You MUST use RAM with the same voltage requirement in all slots. You can get by raising it on the lower one by .5V.

If SIW isn't showing the RAM voltage then look at the sticks or look in the BIOS to see what you now have.


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#21
June 12, 2011 at 06:21:15
Ok, I guess you are right. I 'll leave it as it is for some time and see whether I need to do something or not. Thank you for your responses, and everyone else too.

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#22
June 12, 2011 at 07:38:11
No problem, good luck

If you plan on leaving the 1 stick out, you could RMA it for replacement.


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#23
July 1, 2011 at 14:11:45
Hi again!
Situation right now is that im with all 4 modules and the main problem is that about 1/10 of the times I turn on my pc it enters windows but doesnt load all startup programma and freezes so i need to restart it using the button, and it also freezes sometimes but very rarely.
A friend suggested that I increase the North bridge Voltage and the ram voltage too.
After checking the bios options I think about putting the Northbridge on 1,393 V and the Ram at 1,92
What do you think? Can this harm my pc or is it only positive or at worst the same as before?

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#24
July 1, 2011 at 18:04:28
Upping the RAM that much probably won't harm things. I wouldn't make two changes at one time. If you do that you don't know which one helped.

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#25
July 2, 2011 at 18:04:43
I raised the north bridge voltage to 1,393. Now I 'll wait and see if it changes anything. Thanks for the reply!

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