Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: understanding CPU-Z

02 Mar 2012   #1
Layback Bear

Windows 7 Pro. 64/SP-1
 
 
understanding CPU-Z

If CPU-Z shows DRAM Frequency at 600 and you have duel channel that would mean your ram is working at 1200.
If one has DDR 3 on a 3 channel motherboard DRAM Frequency 600 is that ram still working at 1200 or 1800?
N/B frequency at 2400


My System SpecsSystem Spec
02 Mar 2012   #2
soho1

Win 7 Pro 64-bit
 
 

I would have thought each channel is a maximum and that there is nothing additive. On the other hand, you might get a better answer from your average barista, as I have no idea. But I'm curious now and will follow your thread.
My System SpecsSystem Spec
02 Mar 2012   #3
GeneO

Windows 7 64 bit SP1. EFI boot partition, full EFI boot.
 
 

The times two is from double data rate (DDR), not the number of channels. So 1200.
My System SpecsSystem Spec
02 Mar 2012   #4
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

DDR-2 = 2 DATA RATES/600 X 2 =1200 Ram speed
--------------------------------------------------------------
DDR-3 = 3 DATA RATES/ /600 X 3 = 1800 Ram speed ????
--------------------------------------------------------------
The reason I ask is my DRAM frequency is 850 and I have DDR-3. I'm thinking that it is still X 2 @ 1700 because I don't see how it could be at 850 X 3 = 2550 Ram speed.
My System SpecsSystem Spec
02 Mar 2012   #5
GeneO

Windows 7 64 bit SP1. EFI boot partition, full EFI boot.
 
 

No DDRx = Double Data Rate, type x. The x is not a multiplier for speed. DDR3 is not triple channel. I am running Dual Channel DDR3 memory for instance. The x is an interface specification. DDR3 is an interface specification for Double Data Rate type 3.

So for all DDRx memory, CPU-Z will show 1/2 the memory frequency.

Edit: I forgot the details: DDR does 2 transfers each clock cycle. So the 600 is the actual clock rate.
My System SpecsSystem Spec
02 Mar 2012   #6
GeneO

Windows 7 64 bit SP1. EFI boot partition, full EFI boot.
 
 

So let me add a little more.

For 1200 MHz DDR (800 Mhz clock) you will see a bandwidth of up to
1200 x (64 bits / 8 biits per byte) x 2 = 19,200 MB/s for dual channel memory and
1200 x (64/8) x 3 = 28,800 MB/s for triple channel

So you aren't being cheated
My System SpecsSystem Spec
02 Mar 2012   #7
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

I don't think I'm being cheated, that is not why I'm asking the question.
The (X) is not a multiplier, that helps me understand.
Sorry for the confusion on my part.
My System SpecsSystem Spec
02 Mar 2012   #8
GeneO

Windows 7 64 bit SP1. EFI boot partition, full EFI boot.
 
 

Common misunderstanding. I was just joking about feeling cheated
My System SpecsSystem Spec
Reply

 understanding CPU-Z




Thread Tools



Similar help and support threads for2: understanding CPU-Z
Thread Forum
understanding computer Chillout Room
Understanding HijackThis System Security
Understanding 64-Bit Office News
Understanding CPU temperature Hardware & Devices
Understanding Encryption Security News
Understanding XP Mode News

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 08:51 AM.
Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App