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Check RAM Speed - Interpret CPU-Z Info

post #1 of 8
6/5/10 at 5:26pm
Thread Starter 
So I've recently finished my computer and I want to know what speed my RAM is running at.

I haven't fiddled with the timings or anything; just popped the RAM in and it worked.

I've installed CPU-Z and looked at the info there, but I don't know what it means.

My motherboard

My RAM

Although Newegg says you need to OC, BioStar's website says the mobo can run DDR3 1600 without overclocking.

CPU-Z screenshots:







Anyway, there's the info. Can anyone tell me how to interpret it?

Thanks
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post #2 of 8
6/5/10 at 5:28pm
seems like at 533 mhz
so 1066 Mhz
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post #3 of 8
6/5/10 at 11:12pm
Thread Starter 
Quote:
Originally Posted by KaRLiToS View Post
seems like at 533 MHz
so 1066 Mhz
Ok, correct me if I'm wrong, but you got the "533 MHz" from here, right?



And since it's dual, channel, you multiply it by 2 to get the overall speed? (that's a guess, please correct me if I'm wrong)
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post #4 of 8
6/5/10 at 11:15pm
Yea.

To run at 1600 DRAM freq has to be at 800. You can do this by increasing the FSB: DRAM ratio (mine only lets me do up to 5x)
Edited by elson - 6/5/10 at 11:28pm
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post #5 of 8
6/5/10 at 11:16pm
Quote:
Originally Posted by yellowsnow4free View Post
Ok, correct me if I'm wrong, but you got the "533 MHz" from here, right?



And since it's dual, channel, you multiply it by 2 to get the overall speed? (that's a guess, please correct me if I'm wrong)
yes that is where you get the 533. and its Double Data Rate to get the real frequency.

In order to get that RAm to 1600Mhz, you will need to go into the BIOS and set a 12x RAM multiplier if you leave the CPU at the stock 133mhz BCLK

Quote:
Yea. Its dual channel so its 533 x 2 = 1066
wrong. DDR like above^
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post #6 of 8
6/5/10 at 11:20pm
Quote:
Originally Posted by elson View Post
Yea. Its dual channel so its 533 x 2 = 1066

To run at 1600 DRAM freq has to be at 800. You can do this by increasing the FSBRAM ratio and the FSB or Baseclock for your i5
Wrong.

DDR = DOUBLE Data Rate. So 533x2 = 1066, which is correct. But its DOUBLE because its DDR, not because its in dual channel mode. Dual channel mode just means that its using both memory channels instead of one.

And yes, to run at the rated DDR1600 speeds, the speed needs to be increased from 533Mhz to 800MHz.
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post #7 of 8
6/5/10 at 11:22pm
Yea i sry i misread. I fixed that
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post #8 of 8
6/6/10 at 4:37pm
Thread Starter 
Quote:
Originally Posted by elson View Post
To run at 1600 DRAM freq has to be at 800. You can do this by increasing the FSB: DRAM ratio
Okay, did that (I think).

It only allowed me to get up to 1333... I'll check around some more.

Anyway, it did work; CPU-Z told me so

EDIT:

After a few emails back and forth with BioStar, it is confirmed that I'd have to overclock in order to use DDR3 1600.
Edited by yellowsnow4free - 6/9/10 at 3:38pm
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