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For reference, this is the RAM that I have installed: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231449

Both that page as well as the RAM stick itself say PC3 17000. However, when I use CPU-Z or Speccy to report my hardware specs, it shows the RAM as being PC3 12800 (800MHz).

Is this normal?

I'm asking because I'm wondering if all this time I've been using RAM at less than its potential. Perhaps a BIOS setting or something is limiting the RAM in some way... although I'm not sure.

My CPU is an AMD Phenom II X4 955.

vertigoelectric
  • 593

2 Answers2

3

RAM in modern system will have its FSB controlled by the CPU instead of the northbridge. AMD Calls this Hypertransport. To get the highest speed, both the CPU and the RAM must support it. Your processor will not, by default have its HT link turned that high, you will have to overclock it.

Also, FSB or Front Side bus is NOT the same thing, but I used it above to clarify the role of HT.

Austin T French
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1

RAM that requires a non-standard voltage won't use the advertised clock speeds by itself. Motherboards won't set RAM above standard voltages unless you tell it to. You need to finish the process of installing and testing your RAM. Until you confirm the clock speed, timings, and burn it in, you're not ready to boot into an OS.

David Schwartz
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