BACK TO PCSTATS Follow PCSTATS on Facebook PCSTATS RSS Feed PCSTATS Twitter Feed + Motherboards
+ Videocards
+ Memory
+ Beginners Guides
News & Advanced Search  Feedback?
[X]   Directory of
Guides & Reviews

Beginners Guides
Weekly Newsletter
Archived Newsletters

Seagate Backup Plus Slim External USB 3.0 2TB Hard Drive Review
PCstats Q & A - Memory questions - PCstats Q & A - Memory questions
Tue, June 21 2005 | 3:02PM | PermaLink Feedback?

Our eleventeenth Q & A of the week comes from Jim via the PCstats reader feedback page . If you have a question you need answered right away, try our friendly forums for help too.

Q: In your article for beginners about memory, you never mentioned ECC. Exactly what is ECC Registration and does it work with any memory configuration?

A: ECC memory modules and registered memory modules are actually two different things, but they are so often combined together that they have become one in many people's minds.

ECC stands for either Error Checking and Correcting or Error Correcting Code depending on who you ask, but what it boils down to is that each memory module has an extra chip that analyzes the data being written onto the memory module and stores an eight-bit number hashed from each 64-bit section of data stored on the module. When the same data is read from the memory, it is first compared to its eight-bit ECC hash to ensure that it has not changed while being stored. ECC memory can actually correct single-bit errors, making it suitable for server applications where data integrity is absolutely essential.

Registered (or buffered) memory has data registers (small memory storage areas) built into each memory module. These registers handle the data flowing from the memory to the motherboard, and can delay it so that systems with large amounts of memory can better synchronize reading from memory. As you would expect, this can reduce overall memory bandwidth and slow performance while increasing overall stability. All modern desktop and laptop PCs use unbuffered memory which has neither ECC nor registers. Modern memory is extremely unlikely to suffer errors during normal use, so these technologies are restricted to business and server computer markets.

Original URL, circa 2005:

News Archives by Category
Audio / Sound Beginners Guides Benchmarks
Biometrics BIOS Business / Industry
Cases Chipset Computer / SFF PCs
Cooling / Heatsinks CPU / Processors Digital Cameras
Drivers Editorial Games
Gossip Hard Drives/SSD Hardware
Home Theatre Imaging Memory
Mobile Devices Monitors Motherboards
Mouse Pads MP3 Players Networking
Notebooks Operating System Optical Drives
Overclocking Peripherals Power Supply
Press Release Printers Servers
Site News Software Tips
Tradeshows / Events Video Cards Web News
   06 / 21 / 2018 | 10:16AM
Hardware Sections 

PCSTATS Network Features Information About Us Contact
PCSTATS Newsletter
ShoppingList Assistance
Tech Glossary
Technology WebSite Listings
PermaLink News
Archived News
Submit News (Review RSS Feed)
Site Map
PCstats Wallpaper
About Us
Privacy Policy
Advertise on PCSTATS

How's Our Driving?
© Copyright 1999-2018 All rights reserved. Privacy policy and Terms of Use.