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ADATA 1333MHz DDR3 RAM running at only 667MHz

Last response: in Motherboards
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March 31, 2012 1:08:42 PM

Hello,
In my new build I installed one ADATA premier 4GB 1333MHz DDR3 RAM but when I checked its clock in Speecy and CPU-Z it showed only 667 MHz.
What could be the reason?
Specs:
AMD Phenom II X4 955 BE (supports upto 1333MHz RAM)
ASUS M5A88-M motherboard

Best solution

a b Ĉ ASUS
a b V Motherboard
March 31, 2012 1:14:57 PM

The DRAM Frequency number as reported by CPUZ needs to be multiplied by x2 (e.g., 667*2=1333). This is due to DDR (Dual Data Rate). In simplest of explanations, the modules are running at a raw 667MHz, but due to DDR techniques, you are getting a data rate of 1333MHz.


Edit:
http://en.wikipedia.org/wiki/DDR3_SDRAM#JEDEC_standard_...
JEDEC standards explained in chart form
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March 31, 2012 1:23:46 PM

So it means everything is working fine and i should not worry about it?
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a b Ĉ ASUS
a b V Motherboard
March 31, 2012 1:31:25 PM

psm360 said:
So it means everything is working fine and i should not worry about it?


Exactly. Everything is A-OK
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March 31, 2012 1:41:40 PM

Thanks psaus
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March 31, 2012 1:42:01 PM

Best answer selected by psm360.
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