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Overclocking, Benching, Events, Tweaking & Modding => Overclocking motherboards with AMD processors => Topic started by: Urugamer on February 05, 2014, 12:14:37 am

Title: GA 990FXA UD3 3.0 PROBLEM WITH 16GB RAM
Post by: Urugamer on February 05, 2014, 12:14:37 am

HI, how are you? my name is Eduardo.

I have a gigabyte mother ga-990FXA ud3 version 3.0, have cpu fx 8320, and I bought 4 memories kignston hyperx 4gb 2400 mhz, the problem that I can not get my system to boot with 4 modules only run at 1333 mhz not achieve more speed than this. usually with 8gb ran to 2133 without any problem, any solution? Thank you.

Title: Re: GA 990FXA UD3 3.0 PROBLEM WITH 16GB RAM
Post by: DarkstaR on February 06, 2014, 12:14:58 am

Hello Urugamer normally you won't meet any problem running your four memory sticks with your vishera but only at 1333mhz or 1600mhz... indeed those FX processors (4,6 or 8 cores) only accept 1866mhz or more with 2 sticks and not with four...this is a limitation of the memory controller (cpu-northbridge/uncore)  :-\
For my case i'm running only 2 sticks (1600mhz labelled) but with bios tweaking i'm able to run them at 1866mhz and 2133mhz always with 1,50v stock voltage  :D

Title: Re: GA 990FXA UD3 3.0 PROBLEM WITH 16GB RAM
Post by: Urugamer on February 07, 2014, 12:00:37 am

thank you very much for the reply-

Title: Re: GA 990FXA UD3 3.0 PROBLEM WITH 16GB RAM
Post by: DarkstaR on February 07, 2014, 12:01:35 am

You're welcome !!!  ;)

Title: Re: GA 990FXA UD3 3.0 PROBLEM WITH 16GB RAM
Post by: MisterEd on February 08, 2014, 02:04:03 am

DDR3 Memory Frequency Guide
http://support.amd.com/us/kbarticles/Pages/ddr3memoryfrequencyguide.aspx

(https://home.comcast.net/~egkenny/images/AMD_DDR3_Support2w.jpg)

Title: Re: GA 990FXA UD3 3.0 PROBLEM WITH 16GB RAM
Post by: DarkstaR on February 09, 2014, 12:18:59 am

Well i think this explanation is for reference only... here are my settings to see my 2 sticks of ram set at 1066/2133 instead of 800/1600 !  8)
(http://free0.hiboox.com/vignettes/0614/11c29cb874f695e4cfe67c1bdeab9b7d.jpg) (http://www.hiboox.fr/go/images/informatique/forum-giga,11c29cb874f695e4cfe67c1bdeab9b7d.jpg.html)