Windows 7: Sabertooth 990FX wont let me set ram to 1866

hello, having a bit of a problem, i have g skill sniper 1866 9-10-9-28 ram

when i go into the BIOS it only allows me to go up to 1600, but the manual and board clearly says itll work with 1866

anybody know if im going to have to overclock? the site doesnt say i should need to.



any help would be appreciated

specs in sig

I had the same issue with my Sabertooth; the RAM I'm using sold as 1866MHz as well, but was downclocked by the mobo. Had to manually set the RAM timings and everything worked fine after.

Did you do that already? (Just make sure you set the right ones, it might be confusing if you never did it before, there can be a lot of timings available to change)

i did set the timings and it seems to be running fine, i just dont understand why there wouldnt be an auto option to set to 1866.

i havent had any BSOD, so thats not an issue, just trying to figure out why it wouldnt register correctly but the board says it supports it

we have similar set ups to and i was wondering maybe cause its the phenoms mem controller, but if you have the fx and the same issue i dont see why its doing that

hey and another question, i assume you hook your PC up via HDMI to your TV, did you get any stuttering when playing 1080 content through VLC? i for the life of me cannot figure out why its doing that

Yeah my BIOS had some automatic setting for 1866, but it didn't take. I'll blame it on techno leprechauns.

No stuttering anywhere. Got GeForce's latest driver?

yea i got the latest drivers, its a fresh install of 7, i had the same problem on my previous board as well.

maybe its the TV its rather new and has 120Hz

tells me its HDCP capable so i dunno.

yea my BIOS has no auto setting for 1866 maybe i need to update my bios.

I don't have 120Hz, could be something with its interpolation of the frames. Read the tv manual?

Oh yeah, I forgot, there is a BIOS update that I installed. 0901, get it here.

About the 1866MHz, are you sure you're looking in the right spot, I forgot where it was but it's definately there. Hold on I'll reboot and check it out.

Go into your BIOS and change to "Advanced Mode", then select the "Ai Tweaker" tab, then scroll down until you find "Memory Frequency" (maybe the 7th one down), and click on "Auto". It should give you a drop down list of choices, one being 1866MHz, unless you've been overclocking, then they might've changed given the bus speed of your NB and your multiplier, I believe.

Timings do have to be set manually but won't effect the speed. You will need to set your CPU mode to manual and the set your CPU frequency to at least 233 which will get your RAM to 1866MHz or real close. This will also overclock your CPU so you will need to lower the multiplier if you don't want that. Make sure your DRAM options are all manual to allow you to set the RAM volts to 1.5V. You may need to set the CPU NB to 1.4 and add about .1 or .2 to the NB.