Any problem w/mixing ECC & non-ECC memory?
Just like the title says, is there any hang-ups with mixing ECC & non-ECC memory types. I have a machine here at work with 128mb non-ECC SDRAM and just added two 32mb modules of ECC SDRAM. Seems to be ok, but I don't know if any conflicts would be subtle or major. The motherboard's ECC setting in the BIOS is set to auto.
I just assume it would use all the ram as non-ECC instead of trying to manage two different types of memory. My question is, is this fine to do?
I'm no expert on memory, but I know ECC is a little slower, so you may notice about a 1 or 2 nano-second slow down in your processes Other than that, it should work alright!
It also depends on your chipset. I know some chipsets at one time didn't support it. Also, another issue is whether your chipset supports per-bank ECC, where you can mix ECC and regular. If it doesn't, you would have to run all ECC.
I would recommend setting the ECC bios option to disable, this way ECC checking is definitely disabled. When operating in non-ECC mode, ECC ram should prove stable while mixed with standard memory. Some older chipsets set the ECC option automatically, and as Nighthak noted, may not work withour proper per-bank ECC addressing.
Thanks. Thought I come back and let ya know I was indeed getting random memory errors with the ECC setting in the BIOS set to AUTO. When I disabled ECC checking the system became rock stable.
This Thread is a great example of how we all benefit when someone cares enough to share what has been learned.
I thought Error Checking and Correction (ECC) was more reliable than non-ECC SDRAM? I know it is more expensive. I wonder why you would get memory errors with it enabled?
Because he was using non-ECC ram with the ECC. This enabled ECC for all memory banks (when set on auto), causing memory errors.
[This message has been edited by Barney (edited 02-02-2001).]
I'm not an expert on this subject either. However, I am running both ECC and Non-ECC Ram in my system as we speak. The only thing I had to do was disable ECC in the BIOS. If I don't, I get all kinds of errors and hang-ups. Other than that, I don't notice any difference. Hopes this helps a little.
New Security Features Planned for Firefox 4
Another Laptop Theft Exposes 21K Patients' Data
Oracle Hits to Road to Pitch Data Center Plans
Microsoft Preps Array of Windows Patches
Microsoft Nears IE9 Beta With Final Preview
Simplified Analytics Improve CRM, BI Tools
Android Passes RIM as Top Mobile OS in 2Q
VMware Updates Hyperic System Management
File Monitoring Key to Enterprise Security
LinkedIn Snaps Up SaaS Player mSpoke