Forskellige angivelser vedr. ddr-ram

EEC RAM:
Dataintegritetskontrol (ECC RAM):
Alle typer RAM kan i dag fås som ECC (Error Correction) RAM. Denne RAM type er dyrere, men til gengæld har de, ved hjælp af en ekstra indbygget chip, muligheden for at rette fejl under overførslen til og fra hukommelse. Almindelige RAM har ikke denne funktion.

Det er sjældent at disse fejl opstår, og for almindelige brugere har det næppe den store betydning. ECC RAM anbefales derimod til computere, hvor det er vigtigt med høj sikkerhed og stabilitet – for eksempel til servere. Desuden er ECC RAM også lidt langsommere end almindelige RAM, pga. at der skal sendes fejlrettelsesdata, sammen med almindelige data.
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Unbuffered Ram:

As I was testing the different memory types, I was curious how Sisoft Sandra would interpret the differences. I decided to include a small screenshot for giggles.

There really isn't a lot to say from a technical perspective about unbuffered memory. It's what the vast majority of PCs on the planet use. Essentially, with unbuffered memory the chipset deals directly with the memory itself. There is nothing in between the two parties as they communicate.
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Registered RAM:

Registered memory is where the fun begins. I have defined in the past, wayyy back in my Iwill DVD266-R review. I'll use the same quote I did then:

"Registered modules have additional components (registers) placed between the incoming address and control information and the SDRAM components. These modules are typically used in Servers due to their added reliability (they place much less of an electrical load on the memory controller and therefore make it possible to have as many as 16 or 32 modules in a large system)."

From what I've read, a stick of memory that contains registers will actually hold data for one full clock cycle before it's passed on. A small performance hit is generally incurred as a result. Registered memory is all about scalability and stability.
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EEC RAM:

I've heard a couple of different takes on the ECC acronym over the years: Error Checking and Correction and Error-Correcting Code memory. Whatever you choose to call it, ECC memory includes special circuitry for testing the accuracy of data as it passes in and out of memory. One common misconception is that if a stick of memory is capable of ECC it must also be registered (this is certainly a common combination). This is incorrect as you can find unbuffered, ECC modules if you look hard enough.

As a general rule, a quick way to find out if a stick of memory is capable of ECC is to count the number of DRAM chips on the module. If you look closely at the pictures above, you'll note that the unbuffered stick has 8 separate DRAM chips on the module while the registered/ECC part has 9. It's the 9th chip that allows for the 8-bits of error checking and correction, if needed.
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What about these additional components? Will I easily be able to tell the difference between a registered stick of memory and a regular unbuffered stick?

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