RAM underperforming - Shows 333mhz instead of 667mhz

[karthikg]

I have an old laptop Acer 6930. There are 2 RAMs in it and both of them are 667Mhz.

When I checked in CPUZ , it shows like this

Is there anything wrong with it? Besides it shows as 333mhz in cpuz instead of 667mhz. Laptop became very slow after having these 2 RAMs.

 

[ignatzatsonic]

I don't think there is anything wrong.

DDR stands for double data rate; double 333 is about 667.

 

[karthikg]

I don't think there is anything wrong.

DDR stands for double data rate; double 333 is about 667.

My doubt is frequency marked on the Ram is 667 but in cpuz for each slot it shows only 334mhz

 

[ignatzatsonic]

That's right.

Data is transferred TWICE per clock signal, thereby doubling the data transmission rate---from 333 to 667.

 

[wasnotwas]

Some softwares actually spell this out eg AIDA64 shows here

Real Clock 800MHz (DDR), Effective Clock 1600MHz

 

[RoasterMen]

And the sticks are not of the same brand as well.

 

[Digerati]

I agree that all looks good. As others noted, because the RAM is DDR, it processes data on both sides of the "cycle" - the flip and the flop so the "effective" rate (333) is doubles. It is really slightly more than exactly 333.0MHz so 667MHz is right.

Don't worry about different brands. That used to be something to be concerned with years ago, but modern RAM manufacturing techniques ensure all RAM coming off the production lines meet published specifications to ensure compatibility. Also, today's memory controllers are much more capable today at forcing slightly dissimilar RAM to play well together.

If the different brands were a problem in your case, you would not even see 1 whole stick. But since clearly both sticks are fully recognized, you are definitely good to go!

 

[AddRAM]

And the sticks are not of the same brand as well.

Doesn`t matter, that`s just the sellers sticker, look closely at the black ram chips, they are manufactured by the same company.

And the speed is fine.

 

[Digerati]

look closely at the black ram chips, they are manufactured by the same company.

Good catch!