Computer Help forum

General discussion

Why is my 1800MHZ ram sticks running at 666MHZ?

by noora4 / May 10, 2008 6:23 AM PDT

I just finished building my PC and managed to boot Vista up, but when I check my Ram in the NVIDIA Control Panel it says that they are running at 666MHZ when I purchsed 1800MHZ Ram. How would I get it to 1800MHZ?

Discussion is locked
You are posting a reply to: Why is my 1800MHZ ram sticks running at 666MHZ?
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: Why is my 1800MHZ ram sticks running at 666MHZ?
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.
Collapse -
by R. Proffitt Forum moderator / May 10, 2008 6:28 AM PDT

Completing your post with the make, model and maybe a link to this motherboard's home page.

Collapse -
Couldn't find the manual.
by R. Proffitt Forum moderator / May 10, 2008 7:12 AM PDT
In reply to: Specs
Collapse -
Speed it up.
by R. Proffitt Forum moderator / May 10, 2008 7:32 AM PDT
Collapse -
by At The Opera / May 10, 2008 7:12 AM PDT

The RAM operates at roughly 666MHz, but can send/receive data on the up and down cycle, so it's an EFFECTIVE speed of around 1800MHz when you add in the correct multiplier.

This is how DDR RAM worked way back when. Your DDR 400 RAM is really only running at 200MHz, but since it can transfer data twice in one clock cycle, it's marketed as 400MHz.

Collapse -
(NT) And what RAM exactly did you purchase?
by Kees Bakker / May 10, 2008 7:14 AM PDT
Collapse -
by noora4 / May 10, 2008 7:24 AM PDT

The product code for the motherboard is MB-N790-IUL9.

Collapse -
you just need to manually configure the RAM in your BIOS
by ramarc / May 11, 2008 2:22 AM PDT

Select the Advanced Chipset Features in the BIOS menu.
Change FSB - Memory Clock Mode to Unlinked
Set MEM (DDR), Mhz to 1800 or 1866.
You'll also probably need to edit Memory Timing Setting to match the RAM's rated specs of 8-8-8-24.

Why was it underclocked? The mobo probably chose the safest setting from the memory's SPD. High-performance memory usually needs to be configured manually to reach it's rated performance.

Popular Forums
Computer Newbies 10,686 discussions
Computer Help 54,365 discussions
Laptops 21,181 discussions
Networking & Wireless 16,313 discussions
Phones 17,137 discussions
Security 31,287 discussions
TVs & Home Theaters 22,101 discussions
Windows 7 8,164 discussions
Windows 10 2,657 discussions


Your favorite shows are back!

Don’t miss your dramas, sitcoms and reality shows. Find out when and where they’re airing!