First post!
Bought the EP-KH8A+ and 768MB Crucial unbuffered non-ecc this weekend... already got the RAM. From the Crucial FAQ:
Is all registered SDRAM also ECC?
Yes and no. Registered SDRAM does not necessarily have to be ECC. However, at Crucial, we've found that our customers who purchase registered SDRAM also want ECC. As a result, all of the registered SDRAM we sell at Crucial.com is also ECC.
How can I tell if I need registered SDRAM?
Most PCs will accept only unbuffered SDRAM. Registered SDRAM is primarily used in servers and was designed for memory modules with 32 or more chips. If you are unsure whether your motherboard or PC supports registered SDRAM, simply look up your system in our Memory Selector. It will tell you which types of memory your system accepts.
You can tell if you have registered SDRAM by looking at one of the modules currently installed in your system. If it has one or more small chips mounted horizontally, you have registered memory. If not, you have unbuffered memory.
Keep in mind, unbuffered and registered modules are not interchangeable. When you install registered SDRAM, all of the modules installed in your PC should be registered.
When I looked up the EP-KH8A (no + in the list) in their memory selector it didn't offer anything but unbuffered. Some ECC, some without.