ASRock Forums : 1333MHz ram runs only 666MHz https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 09 May 2026 14:23:07 +0000 Thu, 25 Feb 2016 01:08:39 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=2053 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[1333MHz ram runs only 666MHz : Here is a screenshot from CPUz...]]> https://forum.asrock.com/forum_posts.asp?TID=2053&PID=10679&title=1333mhz-ram-runs-only-666mhz#10679 Author: Xaltar
Subject: 2053
Posted: 25 Feb 2016 at 1:08am

Here is a screenshot from CPUz of my memory:



As you can see it lists the unmultiplied clock in brackets. If your RAM is showing say 333 in brackets (in the case of your DDR3 1333) then you know it is working at half it's rated speed. If it shows 666 as you stated in your first post then it is working as it should. This is the reason for the DDR adage at the front of the RAM type, DDR = Double Data Rate and the number after that denotes generation so DDR, DDR2, DDR3 and DDR4 with each successive generation improving performance. So in theory DDR @400 (200mhz x2) should be slower than DDR2 @400 which will be slower than DDR3 clocked  @400 etc

I hope this clarifies things for you. The DRAM frequency is always listed as the unmultiplied figure. CPUz is the go to tool to check this but even in speccy it lists RAM as "Dual/Single Channel (model) @666mhz". Note that it has "mhz" on the end, this usually means that it is listing the DRAM frequency not the rated speed.


Edited by Xaltar - 25 Feb 2016 at 1:10am]]> Thu, 25 Feb 2016 01:08:39 +0000 https://forum.asrock.com/forum_posts.asp?TID=2053&PID=10679&title=1333mhz-ram-runs-only-666mhz#10679 <![CDATA[1333MHz ram runs only 666MHz : Thank you it makes sense, but...]]> https://forum.asrock.com/forum_posts.asp?TID=2053&PID=10676&title=1333mhz-ram-runs-only-666mhz#10676 Author: jmorten
Subject: 2053
Posted: 24 Feb 2016 at 11:26pm

Thank you it makes sense, but there is a program that shows the proper speed for the ram block?]]> Wed, 24 Feb 2016 23:26:12 +0000 https://forum.asrock.com/forum_posts.asp?TID=2053&PID=10676&title=1333mhz-ram-runs-only-666mhz#10676 <![CDATA[1333MHz ram runs only 666MHz : 666 x 2 = 1333Most reporting apps...]]> https://forum.asrock.com/forum_posts.asp?TID=2053&PID=10631&title=1333mhz-ram-runs-only-666mhz#10631 Author: Xaltar
Subject: 2053
Posted: 23 Feb 2016 at 6:17am

666 x 2 = 1333

Most reporting apps report the unmultiplied clock Wink
]]> Tue, 23 Feb 2016 06:17:17 +0000 https://forum.asrock.com/forum_posts.asp?TID=2053&PID=10631&title=1333mhz-ram-runs-only-666mhz#10631 <![CDATA[1333MHz ram runs only 666MHz : HiI have a ram problem, on my...]]> https://forum.asrock.com/forum_posts.asp?TID=2053&PID=10629&title=1333mhz-ram-runs-only-666mhz#10629 Author: jmorten
Subject: 2053
Posted: 23 Feb 2016 at 6:10am

Hi
I have a ram problem, on my E35LM1 motherboard I have fitted a Kingston ValueRAM DDR3-1333 SC - 4GB, but a test with Speccy shows that it only runs 666 MHz, why does it not run faster?
]]> Tue, 23 Feb 2016 06:10:59 +0000 https://forum.asrock.com/forum_posts.asp?TID=2053&PID=10629&title=1333mhz-ram-runs-only-666mhz#10629