Why ram does not work?

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sohailahmedb

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Feb 18, 2018
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Hi guys

I inherited an old PC. It's a Fujitsu Esprimo E5321 E-star 5.0.

It has 2gb ram. I had a spare 8gb ram stick which I put in the pc and removed the 2gb one. Switched the pc on and it did nothing but beep.

I also have another pc Dell 3020 mini tower with 2x4gb ram. Again I swapped this with the Fujitsu pc and had the same problem. Beeping.

Put the old 2gb ram back in the fujitsu and it worked fine.

I have checked the crucial website for compatibility. The website tells me the ram for the fujitsu and dell 3020 is the same.

Why did it not work for me?

The 4gb ram sticks and the 8gb ram sticks work fine. They are in working Pc's.

Any help would be appreciated.

I just got the following information from the fujitsu website related to my pc.

You may use only unbuffered 1.5 V memory modules without ECC.
DDR3 memory modules must comply with the PC3-8500 or PC3-10600 specification

Technical data
Technology DDR3 800 / 1066 MHz unbuffered DIMM modules 240 pin; 1.5 V; 64
bit, no ECC
Total size 512 MBytes to 8 GBytes
Module size 512, 1024, 2048 or 4096 MBytes per module

The above shows why the 8gb stick would not work, why does the 4gb stick not work?
 
Solution
Karadjgne
Count the chips. The 2Gb ram uses 8x256Mb ic's. That's low density. If the 4Gb has only 8x ic's, that's 512Mb ic's, high density. It'd need to have all 16 ic's (256Mb) on the same side. Ram matching on Intel 775 mobo's was a pain in the... to start with if trying to max out. Which today, is what's needed to run windows.
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The Paladin

The Paladin

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max ram of your Fujitsu Esprimo E5321 E-star 5.0. is 8GB
https://sp.ts.fujitsu.com/dmsp/Publications/public/ds-ESPRIMO-E3521-EStar5.pdf
ZFvXyZj.png


make sure the ram your using is the exact same as define above
 
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sohailahmedb

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Feb 18, 2018
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Hi Thanks for the link.

I had seen that already but went and found the documentation for the mainboard. The above i pasted was from this documentation.

Bit more information of the ram stick in the fujitsu already is as follows. (sticker on ram)

SAMSUNG
2GB 1Rx8 PC3 - 10600U - 09-10-A0
M378B5773CH0 - CH9 1106
 
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Karadjgne

Karadjgne

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That's an lga775 mobo. Back then there was 2x kinds of ram, low density and high density. For Intel, you absolutely needed to use low density, single sided IC's, which today in a 4Gb stick is next to impossible to find. Generally 2Gb was far easier as windows only used 3.5Gb max anyways, 2Gb was cheap and easy and worked, and could easily be upgraded to 4Gb with dual sticks. Some mobo's, especially Asus (OEM for many 3rd party vendors) at the time, were also quirky in ram settings. They'd use 8Gb total, but only if you used 4x 2Gb, 2x4Gb wouldn't work, but 1x4Gb would.
 
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Karadjgne

Karadjgne

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Count the chips. The 2Gb ram uses 8x256Mb ic's. That's low density. If the 4Gb has only 8x ic's, that's 512Mb ic's, high density. It'd need to have all 16 ic's (256Mb) on the same side. Ram matching on Intel 775 mobo's was a pain in the... to start with if trying to max out. Which today, is what's needed to run windows.
 
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