MEMORY ISSUE

[dramakyd]

I bought a pair dual channel kingston 256mb ddr 400 about a year ago >>>http://www.newegg.com/Product/Product.aspx?Item=N82E16820141413<<<. last week i ordered a pair of these >>>http://www.newegg.com/Product/Product.aspx?Item=N82E16820220037<<< patriot dual channel 512mb ddr 400. my problem is that when i try to run both of them at the same time they show up as 333mhz instead of 400mhz but when they run alone they show as 400mhz is there any way i can get the two pairs of memory to run at 400mhz?? thank you.

 

[MagnusTheBrewer]

Depending on your MB, you may be able to manually set the speed. A lot of MB's using DDR ram default to 333 when fully populated. Also check command rate, you may not be able to run dual channel when fully populated.

 

[dramakyd]

whats the command rate and how do i check it ?

 

[MagnusTheBrewer]

You have to enter the BIOS both to set the bus speed and command rate. You want to set it as 1T.

 

[Lemon law]

To dramkyd,

As you are finding out, you will have to enter the strange world of overclocking just to get normal clocking. And no matter what you do, you are gasp going to have to do some reading up on the subject. And you should download some free programs to output statistic and benchmarks---some freebies are memtest86, cpu-z, everest 2.2---and I disagree with Magnus, you may want the more desirable IT timings, but you need to sneak up on things.---and back off when memtest86 shows errors.

The other thing you will need are your spd specified ram settings, your mobo manual, you may need to update your bios, and you should google overclocking forums. And those forums will often give you basic tutorials on how to start and get you up to speed on issues. But you will almost certainly have to set your ram timings by taking your ram off auto and then try basicially playing around with settings. But you already violated the first rule---don't mix ram.

And to directly answer your question---cpu-z should report your current command rate.

 

[MagnusTheBrewer]

Originally posted by: Lemon law
To dramkyd,

As you are finding out, you will have to enter the strange world of overclocking just to get normal clocking. And no matter what you do, you are gasp going to have to do some reading up on the subject. And you should download some free programs to output statistic and benchmarks---some freebies are memtest86, cpu-z, everest 2.2---and I disagree with Magnus, you may want the more desirable IT timings, but you need to sneak up on things.---and back off when memtest86 shows errors.

The other thing you will need are your spd specified ram settings, your mobo manual, you may need to update your bios, and you should google overclocking forums. And those forums will often give you basic tutorials on how to start and get you up to speed on issues. But you will almost certainly have to set your ram timings by taking your ram off auto and then try basicially playing around with settings. But you already violated the first rule---don't mix ram.

And to directly answer your question---cpu-z should report your current command rate.

You're right, I was making too many assumptions. I assumed the OP had some familiarity with the BIOS. That said, if the OP does not plan on doing much if any OCing, I doubt he will see any difference by running at 333 versus 400 and in that case, mixing ram is perfectly OK.

 

[Lemon law]

Right you are there Magnus--but its also going to depend on the mobo and processor and a number of other factors--and you may also be right---with all four slots populated,
he may be stuck with PC2700. Its always worth a try---and running stable at pc2700 beats instability at pc3200.---but the goal is stable at pc3200.