DDR3 1600MHz running at 1333MHz

Borealis

Borealis

Borealis

Associate
Joined
17 May 2013
Posts
1,637
I've just rebuilt an AMD machine using a Gigabyte GA-970A-UD3 and plugged in 16GB of Kingston HyperX Black CAS 10 running at 1600MHz.

Only problem is the BIOS only detects it as 1333MHz. I believe this is due to 1600 technically being an overclocked profile. I've never had to mess around with the memory settings before because my other builds all detected the RAM fine, so I'm not sure what I need to adjust in terms of timings/voltages to get it running at 1600MHz.

Apologies if this has already been answered a thousand times but any advice would be very handy!
 
I take it your CPU is the FX-6300 from your other thread? The memory controller within it supports DDR3 speeds up to 1866 MHz so it should be fine with 1600. The board happily supports this speed as well. I guess this is due to the Kingston RAM 1600 MHz profile set as an XMP profile instead of the standard JEDEC profile however, as you guessed.

Go into BIOS, then choose "MB Intelligent Tweaker(M.I.T.)". And then under "DRAM E.O.C.P" you should be able to select the XMP profile, which should set everything up for you. Then save and reboot, and hopefully your RAM will run at the right speed. If it crashes, then you may need to up the RAM voltage, the RAM is rated for 1.5V to 1.65V.

Checking the Kingston site it also seems they released a new revision of the RAM where 1600 MHz is the standard JEDEC profile instead :p.
 
Last edited:
Thanks for the suggestions. Yup, same CPU and motherboard as per my other thread. I looked in the M.I.T and found the DRAM E.O.C.P.

First time I set the "DDR1600" profile and "optimized voltages" only to find it crashed on reboot - must have been slightly off. Tried again with a mysterious "Profile 1" (must be the XMP profile) and it seems to be perfectly stable at 1.5V

So far so good!
 
Yup, seems about right, usually the XMP profiles are called "Profile 1", "Profile 2", etc. Never seen a "DDR1600" profile before though...
 
This motherboard seems to have several stock OC profiles listed under DRAM E.O.C.P. - there were profiles from 1600 to 2000MHz and above I think.

When I tried one of those, the machine crashed, so I went for Profile 1 instead and it seems to work well.
 
You must log in or register to reply here.
Back
Top Bottom