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Can't boot after installing new RAM

Last response: in Memory
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March 2, 2013 9:29:45 PM

Hello, yesterday I bought a new generic RAM but for some reason I can't use it together with my old ram. Both RAMs are 2 GB DDR2 PC2-6400 and the mobo supports up to 4GB. Whenever I try to put them together the BIOS won't boot and the CPU fan gets a bit noisy, as if it was under load, but each RAM works perfectly if I plug them individually, also both DIMM sockets work perfectly if I use them individually.

Motherbaord is ECS G31T-M7 V1.0
(http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?DetailID=897&MenuID=16)


(took these shots with my phone, in case I needed them with the PC off)

Old memory:





New memory:






I've tried resetting the BIOS removing its jumper and manually choosing the SPD settings.

Any help would be appreciated.

More about : boot installing ram

March 2, 2013 9:48:00 PM

Hi

Can you run in safe mode?
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March 2, 2013 9:57:17 PM

With either of the RAMs alone I can run everything normally, but if I try to use both I can't even load the BIOS.
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March 2, 2013 9:59:15 PM

That's weird. Run a windows memory diagnostic for each of the RAMs and see if any errors occur..
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March 3, 2013 12:21:08 AM

Do you have the ability to change the memory controller from bios?
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March 3, 2013 11:42:21 PM

Gate9er said:
That's weird. Run a windows memory diagnostic for each of the RAMs and see if any errors occur..


No errors found :/ 

bak0n said:
Do you have the ability to change the memory controller from bios?


Nope, the only options available are change the frequency (667/800) and SPD settings

I also tried changing the SPD settings to match the info of the slowest of the two RAMs (5-5-5-18) with no success
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March 3, 2013 11:44:41 PM

alukah said:


I also tried changing the SPD settings to match the info of the slowest of the two RAMs (5-5-5-18) with no success


You are saying that the RAM slots are not the same??
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March 4, 2013 2:35:58 AM

I mean the CAS latency, delay and precharge of both RAMs is different, one is 6.0 and the other is 5.0.

Now, in the BIOS I can either set this as automatic (set by default) and it will detect the CAS settings or I can manually set them, I tried both with no success.
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Best solution

March 4, 2013 4:47:50 AM

You'd better refresh the old DIMM's SPD, not just set the BIOS.
Or you can find a normal SPD file to refresh both.
Because:
Old one: SPD defines the 800/533/400MHZ, but the CL value is uncommon in 800(CL=tRCD=tRP=5).
New one: SPD just defines the 800 settings, CL=tRCD=tRP=6.
In this case, system does't know how to set parameters for both...
PS: i think the brand of the new one is not popular...
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March 5, 2013 1:55:35 AM

EDIT: Would it work if I fully replace the old SPD with a dump from the new one?
-- If the DIMM config is the same, yes. It means they are both 2Rx8/2GB, for instance.
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March 5, 2013 3:10:31 AM

Was just thinking. Are the memory modules the same voltage? If they are different it could cause issues.
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March 5, 2013 3:11:52 AM

It worked :D  Thank you very much everyone!

Everything works smoothly, even ran a memory diagnostic test just in case, all good.
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March 5, 2013 3:11:59 AM

Best answer selected by alukah.
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!