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What's the difference? Non-Parity and ECC

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Pack Rat 24

Limp Gawd
Joined
Jan 18, 2004
Messages
472
Well, I'mlooking at memory for a future project, and you know what, I've completely forgotten what the difference between non-parity memory and ECC memory is....

I was looking at this stuff here at crucial... 1 GB Memory

Also, is there anything better the PC 2700 for 1GB sticks of memory? Thanks!
 
Heres some links that will help you understand the differences.

http://www.2cpu.com/articles/memory_comparison/index.html
http://www.pcguide.com/ref/ram/packParity-c.html

Non-parity is "regular" memory, including one bit of storage for each bit of data. Parity memory includes one extra bit of storage for every eight bits of data, used to store information about the data that the system can later use for error detection or correction. It can be used in parity or ECC mode. ECC modules are newer and also include extra bits of information, but can only be used in ECC mode.
Click to expand...

Why do you want 1GB sticks? Yes there are 1GB sticks in higher speed DIMMs.
 
Non-parity is "regular" memory, including one bit of storage for each bit of data. Parity memory includes one extra bit of storage for every eight bits of data, used to store information about the data that the system can later use for error detection or correction. It can be used in parity or ECC mode. ECC modules are newer and also include extra bits of information, but can only be used in ECC mode.
Click to expand...

Well, the first sentence of that is definitely correct, [DELETE]but parity memory can't do ECC. It can only detect single bit errors, not correct them.[/DELETE] [EDIT]Apparently parity memory CAN be used as ECC, as ECC is handled in the chipset and the extra bit per byte in parity memory can be repurposed for ECC use. It's pretty much all moot for anything but legacy systems now anyways, as I don't believe parity memory even made the SIMM to DIMM transition.[/EDIT]

IIRC, ECC memory can often still be used in motherboards that don't actually support the ECC functionality.
 
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