HyperX KHX12800D3K2/4G

[Prim01]

Hi,

I am experiencing problems with getting my 2 RAM modules to run at 1600Mhz. As I understand the specifications the voltage should be set somewhere in between 1,7v - 1,9v in order to get to 1600Mhz at 9,9,9,27 timings, something that I seem not be able to obtain.

The first thing I've noticed is that i cant set voltage above 1,8v. If I put 1,85v or above even with modules running at 200x6,66=1333Mhz the system won't post.

Next I tryed to determine what maximum voltage that I can give to RAM where they are still stable and found that the highest voltage that wont give me errors in memtest86+ is 1,7v, with modules running at 200x6,66=1333Mhz. At 1,75v I start to get errors on the 7th test in memtest86+ program.

Finally I increased FBS and came up that the highest speed that was 215x6,66=1432Mhz.

So my question is about your thoughts on what might be causing this rather bad performance, and wether I can do something to correct it.



Here is the list of my components:

Gigabyte MA790XT-UD4P (F4g)
AMD Phenom II 720BE
Kingston DDR3 HyperX 1600MHz 4GB (9,9,9,27)
Gainward GTS250 1024Mb
Samsung Spinpoint 2x160Gb (Raid0)
Western Digital 500Gb
Antec Phantom Power 500W

[artdrivers]

http://china.giga-byte.com/FileList/...0xt-ud4p_e.pdf
I noticed that optimized memory for the Phenom AM3 is low voltage @ 1.65V Kingstons MA790XT-UD4P memory recomendation and Gigabytes MA790XT-UD4P motherboard QVL below neather one list that memory for that motherboard. I believe you will have to use it at a lower frequency than DDR1600Mhz @ 1.7v or less for now.
http://www.valueram.com/datasheets/KHX12800D3K2_4G.pdf
http://www.gigabyte.us/FileList/Memo...790xt-ud4p.pdf
Kingston Technology Company - Kingston Memory Search - Search Results for:
Kingston Technology Company - Memory Search - Modelsinfo