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HP DDR2 doesn't fit in my DDR2 slot

Last response: in Memory
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October 24, 2013 8:08:38 AM

So are there really more than one types DDR2 modules? I just got a pair of DDR2 modules titled "HP 4GB FBD PC2-5300 2x2GB Kit". I already have another 2GB module labeled PC2-5300 already working in my machine, but these new modules do not fit in the slots. The cut position in the module is about 3-4 mm away from that of the slot. Any insight?

BTW, my machine is DELL Optiplex 755. CPU-Z tells me that my chipset is Intel Q35 if that is of any help.

UPDATE: Adding a pic of these new modules.

More about : ddr2 fit ddr2 slot

a b } Memory
October 24, 2013 8:13:32 AM

Did you buy 204 pin laptop dimms when you need 240 pin desktop dimms or vice versa?
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October 24, 2013 8:14:40 AM

Did you flip the chip around and try to insert it again?
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a b α HP
a c 241 } Memory
October 24, 2013 8:16:23 AM

+1^ there is only one std slot.
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a b α HP
a c 241 } Memory
October 24, 2013 8:18:23 AM

Laptop ram is noticeably shorter so I think OP would have figured it out!
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a b } Memory
October 24, 2013 8:23:36 AM

Registered and/or ECC DIMMs may have their notch slightly offset, these are for servers and workstations.
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October 24, 2013 8:24:52 AM

wanderer11 said:
Did you buy 204 pin laptop dimms when you need 240 pin desktop dimms or vice versa?


Not 100% sure, but I don't believe so. The width of these new modules is precisely the same as the one that is working in my machine. Secondly, the laptop dimms I have seen are more than double the height of these PC dimms, which is not the case with these modules, though I do see a strange "protective metallic sheet" that covers both sides of these modules. This sheet is not present on the module that is working.

PsyKhiqZero said:
Did you flip the chip around and try to insert it again?


Yes, I have tried that, but that takes the cut even more away.
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a b α HP
a c 241 } Memory
October 24, 2013 8:32:38 AM

Then that would be a HP only thing for people to have to buy ram from them for their servers. Can you post a picture of both side by side?
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a b α HP
a b } Memory
October 24, 2013 8:38:23 AM

do they have the serial#? or part# on the ram?
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October 24, 2013 8:52:03 AM

Added a pic of the new modules. One of them is showing its serial number too.
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a b α HP
a b } Memory
October 24, 2013 9:12:59 AM

Is says ECC - it's meant for a server. It probably wouldn't work in you computer even if you could plug them in.
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