800Mhz or 1066Mhz DDRII for Intel Q9450?

tomsonman

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Sep 19, 2007
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Have a question.

Building a machine for Q9450 (till february will have E6750). I will not OC the machine, just want pure stability and quality of all the components.

Now, my question is:

Q9450 has 1333fsb, what DDRII memory should fit here, 800Mhz or 1066Mhz? (I will not OC)


Mobo will be Asus P5K-E.
(Not shure what it means for 1066Mhz DDRII becouse it says:)

"The chipset officially supports the memory frequency up to DDR2 800MHz. Tuned by ASUS Super Memspeed Technology, this motherboard natively supports up to DDR2 1066MHz"

 

zenmaster

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Feb 21, 2006
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I would look at DDR2-1066.

You would want to reach at least DDR2-1000 Speeds to start pushing the OC limit of that chip.

DDR2-1000 will put it just under 4.0 Ghz.

Folks were hitting this on 1.4v on some tests I saw and that was with reasonable temps.
That would mean that the Low 4.x Ghz should be doable if your ram is fast enough.

I'm not sure what the FSB walls of that Mobo is, however.
You may want to research a bit.
 

lafontma

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Actually if you arent overclocking and want a 1:1 memory/bus ratio you dont need anything above DDR667. So basically anything 667 and above will be fine.
 

Crashman

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CAS 4 has a 20% faster response time than CAS 5. This has minimal effect on most programs, since CAS 5 is already so quick at DDR2-800 cycle times.
 

tomsonman

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So there is no sense of buying CL4? (the price diference is 20€)

As I'm building this comp for using it with VSTi's (Software Instruments) which works above all with memory, is there maybe an effect in this programs like Cubase, Nuendo ... ?

 

Crashman

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Former Staff
I know that some programs show larger performance gains from lower latency memory, but I'm not sure which programs are affected.

Too bad you don't get U.S. prices, I was recommending Ballistix in part because 2x1GB costs around $60 here.