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Notebook memory questions

by msoucy / May 3, 2005 10:56 AM PDT

I'm looking for some memory for a used IBM ThinkPad T23, model # 2647-8MU that I just bought. I want to make sure I order the correct type of memory. What is the difference between Non-Parity, and Non-ECC memory? Are they interchangeable?

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Try Crucial
by Steven Haninger / May 3, 2005 11:05 AM PDT

Plug in your information and the correct memory is usually found for your purpose. Click here for the site I've used their memory in many PCs and bought for laptops. It always works. Good luck

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Parity and ECC are different concept but both 9-bit
by unknownkw / May 3, 2005 11:25 PM PDT

Normal memory don't have parity nor ECC capability. Parity or ECC memory are rarely found in notebooks, parity memory has error report feature, while ECC stands for Error Checking and Correcting. Parity or ECC memory both have 9-bit length to store a 8-bit data. Normal memory only have 8-bit that's unable to check single bit error on the fly.

ECC memory can always used just like parity memory.

Parity memory are usually not ECC capable, but some mainboards can use built-in memory controllers that simulate ECC function on a parity memory stick.

Non-parity, non-ECC memory is a single memory type, it's normal memory without error checking capability.

Almost all notebooks do not use error checking memory.

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