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Is it Normal for 800mhz RAM to Show Up as 400mhz in CPU-Z?

post #1 of 9
Thread Starter 
I just set my RAM in bios to have the stock settings, because apparently they werent right in BIOS, so I changed that and everything is working. My question is, is it normal for my RAM to show up as 400Mhz in CPU-Z?

I noticed in this thread, which has the same CPU and mobo, that it shows the same thing.

Also, I wasnt sure what "Command Rate (CR)" was in BIOS, so I set it to 1T instead of 2T, since everything else wasnt right.

Since Im here anyway, is it normal for my CPU to downclock itself when the PC is in idle? I did a quick video conversion and it went to 2.6ghz, but never 2.8ghz, which is stock.

My CPU-Z:
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post #2 of 9
Yep.
It's Double Data Rate, therefore the 'effective clock speed' is double the value you're seeing.
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post #3 of 9
That is showing one stick of RAM specs. So if you have dual channel memory and 2 sticks you are running 800mhz.
post #4 of 9
Quote:
Originally Posted by Chuckclc View Post
That is showing one stick of RAM specs. So if you have dual channel memory and 2 sticks you are running 800mhz.
You serious? so if he is running 4 sticks he gets 1600mhz with ddr2? rofl...

From what I know
This
Quote:
Originally Posted by beers View Post
Yep.
It's Double Data Rate, therefore the 'effective clock speed' is double the value you're seeing.
is the answer.
    
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post #5 of 9
Thread Starter 
Quote:
Originally Posted by beers View Post
Yep.
It's Double Data Rate, therefore the 'effective clock speed' is double the value you're seeing.
Okay, thanks.

Do you know what the Command Rate should be? Is 1T or 2T better than the other?
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Phoneix
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post #6 of 9
Indeed, because it's Double Data Rate the speed in CPU-Z is shown as 400 while in the BIOS it's 800. Always 2x, not sure if it's the same on DDR3.

For you're second question: It's perfectly normal for a CPU to downclock itself, while the load is (very) low. You can check with RealTemp (link) the movement of the multiplier along with the load on the CPU.
post #7 of 9
Can't remember specifics.
1T is generally a bit 'less latent' and will give slightly better performance.

It made a lot larger difference in DDR1, not as significant anymore.
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by Stef42 View Post
Indeed, because it's Double Data Rate the speed in CPU-Z is shown as 400 while in the BIOS it's 800. Always 2x, not sure if it's the same on DDR3.

For you're second question: It's perfectly normal for a CPU to downclock itself, while the load is (very) low. You can check with RealTemp (link) the movement of the multiplier along with the load on the CPU.
Okay, cool thanks. If I was to overclock the CPU, would it still do this and if so, would it use less power when/if it does downclock itself?

Im still living at home while I go to college, so I dont want to overclock if its going to cost my dad more money on the power bill. As it is I have my GPU on the lowest settings when Im not gaming.
Edited by pLuhhmm - 2/27/11 at 12:47am
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Phoneix
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LG DVD Burner Corsair H110 Windows 7 Ultimate 64 bit PLANAR PX2710MW 27" 2ms 
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post #9 of 9
Even if your CPU used 50w more on average, it would have to be on and under load 24/7 pulling this 50 extra watts to increase your bill by $3.50 a month.

I'm guessing your CPU isn't taxed 100% of the time, so the price is generally negligible for the performance gains.
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Das Rig, Ja?
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