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Asus Sabertooth 990FX Ram

post #1 of 6
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It says it only supports up to 1866mhz ram. I was wondering if it's at all possible to OC ram past 1866mhz on this motherboard.
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Blue Skittle
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post #2 of 6
Im sure you can, ive seen option in bio's upto 2400Mhz !! :O

If you have ram that can handle the frequency etc then try it.
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White Storm
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Nostalgia 775
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post #3 of 6
Quote:
Originally Posted by Mr-Mechraven View Post

Im sure you can, ive seen option in bio's upto 2400Mhz !! :O
If you have ram that can handle the frequency etc then try it.

yup, but to oc your ram you will have to raise your FSB speed make sure you can do that on your processor...
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Rachel
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post #4 of 6
Quote:
Originally Posted by RedScorch View Post

It says it only supports up to 1866mhz ram. I was wondering if it's at all possible to OC ram past 1866mhz on this motherboard.

Yes the mobo makers list what their products will "officially" support. It's very typical to be able to OC beyond those guaranteed specs.

A Phenom II 1100T Thuban CPU however tends to be limited to around ~1800 MHz. RAM frequency as the Internal Memory Controller (IMC), is the limiting factor, not the mobo or higher frequency rated RAM. Since your CPU is unlocked you won't need to OC the FSB you can just change the RAM ratio/multiplier to test out OC'ing options. Obviously you can also up the FSB to OC the RAM but that alters other settings which you may not desire to change.

These links should help:

http://www.hardwaresecrets.com/article/Understanding-RAM-Timings/26

http://www.hardwaresecrets.com/article/152

http://www.overclock.net/t/1264141/memory-gskill-tridentx-2400-mhz-at-crosshair-v-formula-and-fx-8150

http://www.overclock.net/t/1237178/is-o-cing-my-ram-worth-the-trouble/10#post_16866022

I recommend that enthusiasts technically educate themselves on the various RAM options, performance and value issues then Buy What Makes YOU Happy!
post #5 of 6
On the Phenom II your NB speed needs to be 3 time the memory base speed and Most To All Phemon II x6 NB speed will hit 3000. So that means you maybe able to use DDR3 2000 in your rig.

Memory speed = NB speed
1333 = 2000
1600 = 2400
1800 = 2700
1866 = 2799
2000 = 3000

EDIT
If you are talking about FX chips just leave the NB speed/HT speed in auto. The FX chip can handle DDR3 2400.

With a Phenom II
The bios will let you choose up to 1600.
With FX chip
The bios will let you choose up to 2400.
Anything higher you need to OC the ram with FSB.
Edited by dixson01974 - 6/12/12 at 10:02am
post #6 of 6
Thread Starter 
Thanks for all the help guys!
Blue Skittle
(24 items)
 
  
CPUMotherboardGraphicsRAM
FX 8350 4.6ghz Asus Sabertooth 990FX EVGA GTX 670 FTW Corsair Vengeance Blue 16gb 1600mhz 
Hard DriveHard DriveHard DriveOptical Drive
Seagate 500gb OS Drive Seagate 1TB Internal (2.5" on 5.25" brackets) WD Green Caviar Internal 3TB Sony Blu ray player 
CoolingOSMonitorKeyboard
Corsair H80 Windows 7 Home Premium Asus VE247H Logitech G510 
PowerCaseMouseMouse Pad
Silverstone Decathlon 650w Corsair Vengeance Series C70 A4 Tech XL-750BK Razer Goliathus  
AudioAudioAudioAudio
Sennheiser HD598  Sony Stereo 540w Tritton AX 180  Superlux 668B semi open 
OtherOtherOtherOther
WD Elements 1TB External  Toshiba 500gb USB 3.0 External Xbox 360 wireless controller adapter Logitech MX Anywhere 
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Blue Skittle
(24 items)
 
  
CPUMotherboardGraphicsRAM
FX 8350 4.6ghz Asus Sabertooth 990FX EVGA GTX 670 FTW Corsair Vengeance Blue 16gb 1600mhz 
Hard DriveHard DriveHard DriveOptical Drive
Seagate 500gb OS Drive Seagate 1TB Internal (2.5" on 5.25" brackets) WD Green Caviar Internal 3TB Sony Blu ray player 
CoolingOSMonitorKeyboard
Corsair H80 Windows 7 Home Premium Asus VE247H Logitech G510 
PowerCaseMouseMouse Pad
Silverstone Decathlon 650w Corsair Vengeance Series C70 A4 Tech XL-750BK Razer Goliathus  
AudioAudioAudioAudio
Sennheiser HD598  Sony Stereo 540w Tritton AX 180  Superlux 668B semi open 
OtherOtherOtherOther
WD Elements 1TB External  Toshiba 500gb USB 3.0 External Xbox 360 wireless controller adapter Logitech MX Anywhere 
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