Why is my ram running at 1300 MHZ?

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Lastjohn

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Feb 5, 2012
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I have 8 GB's (2 x4 GB's) ram in my computer which is 1600 MHZ but only runs at 1333 MHZ.

Here is the link for my ram http://www.amazon.com/Corsair-Vengeance-PC3-12800-1600mHz-CMZ8GX3M2A1600C9B/dp/B004QBUL1C/ref=sr_1_4?ie=UTF8&qid=1374898574&sr=8-4&keywords=corsair+ram


In the bios menu it shows the ram running at 1300 MHZ and in CPU-Z is shows Dram frequency is 666.7 MHZ (which I found a post on this website that says that is actually 1333 MHZ) and so I am wondering why is my ram intentionally being underclocked?


Also, just a side note, last night I tried to overclock my CPU to 3.1 GHZ (my motherboard overclocks the ram when you overclock the CPU) and when the computer starts up it goes through Bios screen twice (where you can enter it if you want to) and upon reaching the login screen it just hangs at a black screen. I could understand if it didn't like the overclock of the CPU but my friend has the same exact motherboard and CPU as me and overclocked it to 3.5 perfectly fine.

In addition, when getting back to the menu to overclock it only read 1 stick of ram, only when we set the CPu back to 2.7 (default) did it read both sticks of ram as well as let me log in to windows.


None of this makes sense to me, I should be able to overclcok the CPU to 3.1 if my friend can overclock his to 3.5 considering our computers are the same except mine has better ram (1600 MHZ) but for some reason only runs at 1300 MHZ.

Any ideas how to fix all of this? Thanks.
 
Solution
Tradesman1
OK, on AMD, prob best just to manually set the freq to 1600, manually enter your base timings, CR should be 2N, and will also want DRAM voltage prob about + 0.05 over spec, i.e. if 1.5 sticks try 1.55 and try that
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IwinFTW

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Feb 8, 2013
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I would think that your motherboard only supports 1600 MHz under overclock conditions, so you'd have to overclock your CPU to up the RAM frequency.
As to your overclock question, there are many factors at play when you overclock a CPU. Remember that not all CPUs are the same, so one chip may overclock better than another chip.
One important factor is heat. If your CPU is too hot, it will shut down to prevent damage. Another factor is stability. Instability can occur when the CPU vcore is too high or the chip can't handle the overclock. Heat can also cause instability. The actual method you're using to OC can also cause instability.
I'm no expert on overclocking but that should cover it. There might be some options you can check to stabilize your overclock. It'd help if you listed your CPU and motherboard so we can have some idea as to what you may be doing.

As for the undetected stick of RAM, it's probably a bad RAM stick. Take on stick out and test the other, and repeat to find the faulty stick. Replace the faulty stick (note: although you can buy two of the same RAM kits, they may have compatibility issues).

Hope this could help!
 
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Lastjohn

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Feb 5, 2012
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Motherboard is ASUS F1A75-V EVO which supports up to 64 GB's of memory and up to 1866 MHZ not overclocked and 2250 MHZ overclocked so I know that isn;t the problem. Here is the link for the motherboard.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=935872

The Cpu is AMD A6-3670 and here is the link for it.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1723936

Also, I don't think one of the memory sticks is bad, as they have worked fine for two years and the problem where one is not read only comes up when I overclock the CPU.
 
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