DDR Memory not found

I recently bought two 1GB Samsung Memory boards to replace my two 512MB ones. The problem is that the PC doesn't seem to recognize them at all. So I used some software from Windows XP to see if that could find them and it can. So how can I get the actual PC to recognize it's there?

Here's a few shots.

First One of the Samsung 1GB boards in slot 1 that the PC won't recognize but the software can see it.


Second is the old board I used to get the PC running in order to take these pictures in slot 2.


As you can see Windows XP can't see the 1GB board.


The two 1 GB boards I bought as the right type as far as I know though they were marked as " Registered" whatever that means.

Please help this sad know nothing about PCs noob:-(

Yakumo

 

I see your new memory is ECC and registered while your old arn't, maybe your mobo doesn't actually support these properly?

Plus I am pretty sure you can not combine ECC and non ECC RAM together, so try to boot it with only the new modules.

 

Look in the BIOS to see if you have support in there for ECC memory. If not, you are probably hosed.

 

Checked the BIOS and I can use ECC memory (It has an option to check for it or not) but nothing for registered memory. So, looks like I'll have to sell this on and buy some none registered memory.

Thanks for the help guys.

Yakumo

 

First, what for an Mainboard do you have?
An good Tool to look on you PC is Everest Ultimate.
Let me know what Mainboard do you have, and im sure i can help you out with RAMs. P4 Boards mostly can use PC3200 DDR400er 1GB RAMs.
regards
Chris

 

what you have on your hands is some server-quality memory, as I m sure you know, but your needs and the motherboard's standards may dictate/allow (Depends on how pessimistic/optimistic you want to be) for some cheaper, regular memory modules.

this document is very useful in determining whether you need ECC and or Registered memory:

http://images10.newegg.com/UploadFilesForNewegg/itemintelligence/NI_System-Memory/NIC-Pro-Do_I_Need_ECC_and_Registered_Memory-v1.1e.doc

and I quote:

 

Check your board's maximum RAM amount. Some older boards would only accept low amounts of RAM. Some even struggle to use higher than 266Mhz (PC2100).

 

First thing would be to check your boards manual. There will be a table in there of what kind or RAM it'll recognise, and which slots it wants you to put them in. Usually for 4 slots, it'll refer to them as A1 A2 B1 B2. Most boards will usually want you to put a pair of sticks in A1 and B1 - but it really does depend on the board/manufacturer.

If the RAM you've got is not compatible with the board after checking the above - then jump on the manufacturers website and look for a BIOS update for it. If the MBs a few years old, chances are there'll be one there. Often updating the BIOS will sort out ram compatability problems.

Good luck

 

It's all sorted now guys. thanks for the help. A quick update of the BIOS sorted everything out