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DDR2 or DDR2 ECC SDRAM

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July 2, 2012 1:08:56 AM

I am considering buying this motherboard: http://www.supermicro.com/products/motherboard/Xeon1333...
I was wondering if it uses normal DDR2 ram, or if I will need to buy server grade memory, this is the processor(s) I will use: http://www.geeks.com/details.asp?invtid=E5405-R&cat=CPU
Thanks in advance!

More about : ddr2 ddr2 ecc sdram

a b V Motherboard
July 2, 2012 1:57:02 AM

any DDR2 RAM will work fine
ECC RAM works on server and desktop motherboard also normal DDR2 works on server and desktop motherboard
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July 2, 2012 5:10:59 AM

So I can just use my plain old DDR2 RAM? Thats wonderful news!! Thank you!
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a c 139 } Memory
a c 174 V Motherboard
July 2, 2012 5:31:54 AM

jdla140 said:
So I can just use my plain old DDR2 RAM? Thats wonderful news!! Thank you!



No you cannot. Oxford373 is misinformed. The Intel 5100 platform was designed around DDR2-FBDIMMs which are not compatible with standard DDR2-DIMMs. They will not fit and will not work. Most DDR2 platforms that contain more than 4 slots need to be buffered and this platform is the rule not the exception. All FBDIMMs are registered by definition and usually contain ECC as well.

I have a Supermicro X7DCL in one of my rackmounts and it uses FBDIMMs yet the supermicro specification sheet doesn't mention this.
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a b V Motherboard
July 2, 2012 2:59:20 PM

at first time when i answered you, i thought some of this X9 DP motherboards specifications (which the website have its specifications) apply on your mother board
(• Unbuffered DIMMs can be ECC or non-ECC
• A maximum of 8 logical ranks per channel is allowed.
• Mixing of Physical Rank DIMM’s within a channel is allowed except in a 4R + 2R + 2R configuration.
• Mixing of Registered and Unbuffered DIMMs is not allowed.
• Mixing of ECC and non-ECC is not allowed.
• Mixing of LRDIMM with any other DIMM type is not allowed.
• Mixing of DDR3 voltages in not advised. If regular and low voltage DIMM’s are mixed, the DIMMs will run as regular DIMMs.
• Mixing of different DDR3 operating frequencies is not advised. If DIMM’s with different frequencies are mixed, all DIMMs will run at the lowest common frequency.)
but i searched internet and found someone asked intel the same question here
http://communities.intel.com/thread/2254
i am sorry your mother board doesn't support non-ECC RAM
this is RAM compatible list from intel website for your motherboard
http://www.ec.kingston.com/ecom/configurator_new/models...

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a c 139 } Memory
a c 174 V Motherboard
July 2, 2012 3:45:37 PM

oxford373 said:
at first time when i answered you, i thought some of this X9 DP motherboards specifications (which the website have its specifications) apply on your mother board
(• Unbuffered DIMMs can be ECC or non-ECC
• A maximum of 8 logical ranks per channel is allowed.
• Mixing of Physical Rank DIMM’s within a channel is allowed except in a 4R + 2R + 2R configuration.
• Mixing of Registered and Unbuffered DIMMs is not allowed.
• Mixing of ECC and non-ECC is not allowed.
• Mixing of LRDIMM with any other DIMM type is not allowed.
• Mixing of DDR3 voltages in not advised. If regular and low voltage DIMM’s are mixed, the DIMMs will run as regular DIMMs.
• Mixing of different DDR3 operating frequencies is not advised. If DIMM’s with different frequencies are mixed, all DIMMs will run at the lowest common frequency.)
but i searched internet and found someone asked intel the same question here
http://communities.intel.com/thread/2254
i am sorry your mother board doesn't support non-ECC RAM


ECC isn't the problem, the problem is with the fact that the chipset uses intermediary memory buffer between the chipset and each physical slot. Thus, the chipset drives a high impedance buffer for each module over a serial connection and each buffer drives the electrical load of each rank on the module. Thus, the signal integrity remains strong regardless of the number of modules or ranks in the system. This setup is known as a Fully Buffered DIMM or FBDIMM because the entire frame is buffered, not just certain lines. This is functionally similar but logically different than RDIMMs because RDIMMs still use multidrop busses in the same way as standard DIMMs. The end result is that DDR2 FBDIMMs are not compatible with standard DDR2 platforms, nor are standard DDR2 DIMMs compatbile with DDR2 FBDIMM platforms.
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