Question about ram specification.

[shaun166]

Hi guys i saw "6GB Dual Channel DDR3 SDRAM at 1333MHz" on one of dell's laptop specification.
Can anyone explain to me in layman terms what that line mean?
Is it total 6gb @1333mhz? If it is it counted as fast or slow? Sorry i not really good all this things...

 

[1Bowtie]

Hi shaun166

You stated it right 6gb @ 1333mhz is probably top middle fast, there are better brands and higher clocked ram but that is good ram

 

[shaun166]

Hi shaun166

You stated it right 6gb @ 1333mhz is probably top middle fast, there are better brands and higher clocked ram but that is good ram

There are each ram(like 1 2gb ram) @ 1333mhz right? So if i get 3 2gb ram @1333mhz each compare to this total 6gb only 1333mhz isn't that consider as slow? Correct me if I am wrong....

 

[1Bowtie]

Yes each stick is 2gb x 3 equals 6gb total @ 1333mhz, No that is not considered slow, slow was back when you had 800mhz ram in todays standards

 

[bobkn]

Hi guys i saw "6GB Dual Channel DDR3 SDRAM at 1333MHz" on one of dell's laptop specification.
Can anyone explain to me in layman terms what that line mean?
Is it total 6gb @1333mhz? If it is it counted as fast or slow? Sorry i not really good all this things...

Dual channel means that two DIMMs are accessed in parallel, doubling the (theoretical) bandwidth.

I believe that 1333 MHz is the fastest standard specification. There is memory available with higher clocks, but it's outside the standard. (That's true for Intel motherboards. I don't know if it's the same for AMD.) I doubt that most laptops would have the BIOS adjustments needed to set the RAM to higher frequencies.

6GB is a peculiar number. DIMMs are usally made in powers of 2, so that usual capacities are 1, 2, and 4 GB. To get 6 GB dual channel, that suggests two 2 GB plus two 1 GB DIMMs.

 

[shaun166]

So you mean each stick of ram is 1333 divide by 3=444.3mhz?

Ok lets say i have 3 sticks of ram. All 2gb each @1333Mhz(I don't know got such thing exist anot) then total is 6gb right. The total Mhz is 1333x3?

 

[1Bowtie]

Your making this way to hard for yourself, think of it as seperate things, 6gb's of ram and they all run at 1333mhz, i have 8gb's @ 1600mhz

 

[shaun166]

Your making this way to hard for yourself, think of it as seperate things, 6gb's of ram and they all run at 1333mhz, i have 8gb's @ 1600mhz

Because I use CPUz then they show me that my com currently 4gb ram. 2gb@666mhz and 2gb @ 666mhz. Total add up to 1333mhz. Hence, I feel that separate will more easy to understand. Thanks for your huge help!

 

[pparks1]

It's double data rate (DDR) ram. Thus, 667 x 2 = 1333mhz.

Using the older Intel Core 2 Duo or Core 2 Quad chips and the FSB lecture goes like this.

A Core 2 Duo E8400 CPU runs at 3.0ghz by default. It's a 333Mhz Front Side Bus chip, with an 9x multiplier. So, 333x9 = 2997.

Ram in these machines is also based off the front side bus speed of 333Mhz...but when you take into account the double data rate, that becomes 333 x 2 = 667. Thus, when you look at the standard RAM for a Core 2 Duo E8400 it's set to run with DDR2-667 RAM.

Now, if you want to overclock your E8400, most people will raise the Front Side bus speed to something like 400. So, with a 9x multipler, you get 9 x 400 = 3600Mhz. With the RAM, you get 400 x 2 or 800Mhz. So, to run this type of overclock, you really need DDR2-800 RAM installed...

Hopefully that makes some sense.