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DDR2 vs DDR2 400 - Is there any difference?

Tags:
  • Corsair
  • DDR2
  • Motherboards
  • Memory
Last response: in Memory
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October 27, 2012 8:29:51 AM

Hello,

I have been trying to upgrade my computer to 16GB of RAM. My motherboard takes DDR2 400, but the memory company has sent me memory with label 'DDR2 - There's no '400' mentioned. The computer won't accept it and just continually beeps once every couple of seconds without the screen coming on. When I remove the new memory they sent me, it starts again as normal.

I know my motherboard can take 16GB. Each module is 2GB and I am loading them in pairs.
What is in there at the moment that works is:
CORSAIR CM73DD512R-400
DDR2-400 is 200MHz
Memory Type: DDR2 SDRAM

I gave the company my motherboard details because the first order was wrong too (I wasn't sent DDR2)

My current system that works is:
Motherboard:
CPU Type 2x Intel Xeon, 3000 MHz (15 x 200)
Motherboard Name Supermicro X6DA8
Motherboard Chipset Intel Tumwater E7525
System Memory 6144 MB (DDR2-400 Registered ECC DDR2 SDRAM)
DIMM2: Corsair CM73DD512R-400 512 MB DDR2-400 Reg. ECC DDR2 SDRAM (4-3-3-9 @ 200 MHz) (3-3-3-9 @ 200 MHz)
DIMM3: Corsair CM73DD512R-400 512 MB DDR2-400 Reg. ECC DDR2 SDRAM (4-3-3-9 @ 200 MHz) (3-3-3-9 @ 200 MHz)
DIMM4: 256X72L-40C 2 GB DDR2-400 Reg. ECC DDR2 SDRAM (5-3-3-8 @ 200 MHz) (4-3-3-8 @ 200 MHz) (3-3-3-8 @ 200 MHz)
DIMM6: Corsair CM73DD512R-400 512 MB DDR2-400 Reg. ECC DDR2 SDRAM (4-3-3-9 @ 200 MHz) (3-3-3-9 @ 200 MHz)
DIMM7: Corsair CM73DD512R-400 512 MB DDR2-400 Reg. ECC DDR2 SDRAM (4-3-3-9 @ 200 MHz) (3-3-3-9 @ 200 MHz)
DIMM8: 256X72L-40C 2 GB DDR2-400 Reg. ECC DDR2 SDRAM (5-3-3-8 @ 200 MHz) (4-3-3-8 @ 200 MHz) (3-3-3-8 @ 200 MHz)
BIOS Type Phoenix ServerBIOS (06/15/04)

Any ideas what could be wrong?

More about : ddr2 ddr2 400 difference

a c 242 V Motherboard
a c 82 } Memory
October 27, 2012 2:39:41 PM

What modules did you get? How many chips on the modules?
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October 27, 2012 3:29:29 PM

Okay, I need to issue a correct to the above post. This forum, for some crazy reason, doesn't allow me to edit my own post, so I have to issue a new post instead.

The first image shows two different modules actually. The module of RAM on top is DDR2-400 which is the module in my working system. The module you see to the bottom of the first photograph was the module the company sent me the first time and which was sent back to them: http://i18.photobucket.com/albums/b119/appy12/DDR_memor...

After telling them what motherboard I had and sending them a photo of the module, they sent me what you see in photograph 2 (front and back): http://i18.photobucket.com/albums/b119/appy12/Incorrect...
October 27, 2012 3:53:37 PM

Thank you, I appreciate you suggesting that to me. It is probably the next step.

However, I would like to know what is wrong with the memory they sent to me so I have something to go back to them with, otherwise they may not give me my money back and tell me it's my fault!

October 27, 2012 4:16:16 PM

Possibly you need to make sure the pairs match by slot. According to the manual you must add them as follows; 1 pair 1a and 1b, next pair 2a, 2b.

make sure you new memory are in paired slots. not sure this will fix your problem but worth a try.

Also, is the new memory ECC and buffered. Your other memory is and I don't think you can mix ecc/non-ecc or buffered/nonbuffered.
October 27, 2012 4:21:37 PM

Thank you for that info. Yes, you are correct. They must be installed in their proper pairs.

However, due to the fact all these modules are (or at least should be) identical (all 4GB pairs 2 x 2GB), I'm not sure I can do any more to match them. I have tried swapping them around, just in case - I have also tried installed one or two pairs (I bought three pairs), just in case it was one of the modules at fault.

Unfortunately, it doesn't matter what pair I put in there - None of them will start the computer system properly.
What I do get is just one beep sound every couple of seconds, which is continuous.
October 27, 2012 9:55:58 PM

Also I did just try with their memory in the slots on their own (ie. without my old memory in there) to see if it was the EEC-nonEEC memory mix problem. Unfortunately their memory doesn't work on its own either.
a b V Motherboard
a b } Memory
October 27, 2012 10:04:01 PM

Have you tried using a single stick at a time? Or using one stick in one slot at a time then alternating between sticks/slots to see what ram module / slot is acting up?
a b V Motherboard
October 28, 2012 11:23:24 AM

If the new memory does not work at all, even a single stick, it's either defective or incompatible. Sorry...
October 29, 2012 3:16:31 PM

Yes, it looks like it could be incompatible, although I have no idea why, so unsure what to put in the RMA.
!