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RAM only running at 400 mhz.

Last response: in Memory
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January 13, 2013 3:30:12 PM

Hey, I have 4 GB of DDR2 RAM. Two of the sticks are G Skill intl and are both clocked at 800 mhz. The other two sticks are corsair and are clocked at 1066 mhz. But when looking at amd overdrive, they're all only running at 400 mhz. How do I fix this?

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January 13, 2013 3:37:27 PM

It's normal because it's DDR (Double Data Rate). AMD Overdrive reports fine. Nothing needs to be fixed
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a b } Memory
January 13, 2013 3:39:52 PM

You don't its suppose to do that. When you put them in dual channel, they cut their clock speeds in half and synchronize. You get more performance so don't worry about that. And also when you mix ram of different frequencies, the motherboard under clocks the faster ram to match the slower ones. A rookie mistake.
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a b } Memory
January 13, 2013 3:40:24 PM

DDR ram, double data rate, so 800mhz memory runs at 400 mhz. There is nothing wrong with your system.
Additionally, all memory in your system must default to whatever the speed of the slowest sticks, so the 1066mhz will have to run at 800 to match the other memory.
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a b } Memory
January 13, 2013 3:45:08 PM

Azn Cracker said:
You don't its suppose to do that. When you put them in dual channel, they cut their clock speeds in half and synchronize.


Well, thats just a little off base, but DDR memory does actually run at half its "advertised" speed.
They advertise it at the double data rate numbers for selling purposes, because bigger numbers look more impressive to a potential buyer.
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January 13, 2013 4:42:49 PM

ah ok. Well thank you for the clarification. Was concerned for a while.
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