Memory help

ChrisLandin

ChrisLandin

ChrisLandin

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Joined
10 Jun 2009
Posts
2,225
Location
Darlington
Hiya all,

could someone please spec me 4gb of ram for my 790i board that will run at 1600mhz? It has to be dual channel ddr3. This speed is oc'd on my mobo but the box says its capable of running that speed.

I have come Corsair xms3 stuff thats rated to run at 1600 but I cant get it that fast just to 1333.

Im getting confused by the stuff thats suitable for my mobo but says optimised for i5 or i3 etc.

Ta
 
What happens when you adjust the ram multiplier or divider in the BIOS, as your overclocked looking at your sig you should be able to run at 1600mhz.
 
Ah ok, download mem test and run at boot with your memory at 1600mhz.
Also what voltage is your memory running at, this will hopefully be stamped on the side of each memory module.
 
1.8volts.

Ive just had a play with the timmings and relaxed them a bit from 9-9-9-24 1t to 10-10-10-24 2t and ran at 1600 and that passed IBT.

On memory im totally in the dark is that a bad thing to do?
 
You should be ok with slacking the timings but I would run mem test at designed settings.
 
Download mem test, the bootable ISO at bottom of page, burn to cd and then reboot pc and go into the BIOS and set the DVD drive as the first bot device. Save an reboot, hopefully mem test should start.

http://www.memtest.org/
 
What is the voltages that are specified for the sticks of ram you are using? Have a look using CPU-z or pull a stick out and read what it says on the sticker.

I had a set of ram for my old 790i board (may it rest in peace) and they needed 1.9volts just to run at stock. The newer ram today mostly starts at 1.5volts.
 
Cpuz states 1.5v but on the side of the sticks it says 1.8v. In the bios its running at 1.8v but on auto. Do you think I need to manually change the volts in the bios to get it to stick at 1.8v constantly?
 
These are the 2 screen shots I have from cpuz

memory.png


memory1.png


Any ideas??

On the side of the sticks it says they can run at 1600mhz with 1.8v
 
To run at 1600 MHz you are going to need to change the dividers on your motherboard if you do not which to increase the FSB of your CPU. Try the dividers first in my view - less to go wrong, and you then can confirm that your ram will do what it is spec'ed to do.

How I would do it.

1. Change the voltage manually in the bios first that is a good place to start. And it takes one variable out of the equation.

2. Then simply play with your ram dividers till you see your ram frequency as close to the 800/1600 mark. Or any variable of that - could even be 3200 seem to recall quad-pumped for the 775 chipset. So long ago that I used that board (3 years) so forgive my vaigness.

3. Once done boot up and open the CPU-z.

Of course if it fails then go back and change the divider again so that it reflects a slightly lesser frequency of ram. Repeat until you can boot into OS at that frequency. Changing dividers should not make any other changes to your overclock or default settings in your bios.
 
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