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DDR4 read speed is halfed |
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Zange 
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Joined: 10 Sep 2016 Status: Offline Points: 6 |
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 Topic: DDR4 read speed is halfedPosted: 10 Sep 2016 at 7:11pm |
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Hello, i have 1 drr4 Kingston 8 GB DDR4 2666 MHz HyperX FURY (HX426C15FB/8), and in aida mem test i got 10Gb\s read speed, i thought i must get around 20Gb\s, am i right? or i doing something wrong?
Here is my rig and my results
 Edited by Zange - 10 Sep 2016 at 7:12pm |
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Xaltar
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Joined: 16 May 2015 Location: Europe Status: Offline Points: 26918 |
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Posted: 10 Sep 2016 at 7:48pm |
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Difficult to say, you are running in single channel mode so I am not sure just how much that impacts performance. Assuming 100% scaling you should in theory be about 20GB/s with a single DDR4 2666 module but that is assuming a lot.
How do you have the RAM set up in your BIOS, XMP or manual settings?
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Zange
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Posted: 10 Sep 2016 at 8:09pm |
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i figure it out, after forum search i noticed that someone experienced the same problem and recommend to downgrade bios, after i downgraded to 2.00 i got memory on a full speed, any chance to have an updated bios with my ram working normally?
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wardog
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Posted: 11 Sep 2016 at 2:30am |
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Link to this discovered Thread/post please |
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wardog
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Posted: 11 Sep 2016 at 2:37am |
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The pics show memory timing differences and a diff in multipliers
I'm about to call foul ........... |
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clubfoot
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Posted: 11 Sep 2016 at 3:28am |
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Good catch, the cpu cache latency is also funky...the previous updated UEFI was really bad! It is still low,...why run single channel on a dual channel board? :(
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wardog
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Posted: 11 Sep 2016 at 6:49am |
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Some people that's what their budget allow(s)(ed). I try not to make observations like that in a post for exactly that reason. None of my business, really. |
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Zange
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Posted: 11 Sep 2016 at 4:15pm |
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http://forum.asrock.com/forum_posts.asp?TID=1943&PN=2&title=z170-ddr4-2666-low-memory-bandwidth-scores
i tested ram with various settings, but anyway no luck, but i didnt noticed the multiplier but isnt it a turbo boost?
what with l3 cache? looks normal to me, especially when a ram on a full speed
Edited by Zange - 11 Sep 2016 at 4:49pm |
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Xaltar
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Posted: 11 Sep 2016 at 10:35pm |
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Yes, the different multi is caused by intel's turbo boost. Those numbers look fine now
 I see a lot of people concerned about having the latest BIOS, this isn't always best. In many cases the latest BIOS will not benefit you at all and in some, like yours, it will even hamper performance with a particular hardware config. This is most often due to compatibility updates (RAM, SSDs etc) while your particular RAM (in this case) worked fine on a previous BIOS it ends up not working correctly on the newest one due to changes made to support newer models etc. |
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Zange
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Posted: 11 Sep 2016 at 10:47pm |
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is this some kind of a strange politics?, dont you think? i bought my components 7 days ago, and had a headache with the ram speed and etc, the main problem for me is that i cant OC my i5 6500 bcs bios ver. which allows me to do this is ver. 3.00
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Zange wrote: