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Windows 7: AMD system RAM speed question


26 Apr 2010   #1

Win 7 Pro x64/Win 8 Pro x64 dual boot
 
 
AMD system RAM speed question

I'm a little confused. I have three AMD systems in the house, 2 on Windows 7 and 1 on Vista. My own system is Phenom based, and the RAM clocks at either 800 MHz or 1066 MHz, just like it should. As reported by CPU-Z.

In my wife's machine (Asrock N-68, Athlon X2 4000) her DDR2 800 clocks at 740 MHz, and the Media Center Machine (Asus M2N-E, Athlon 3500+) clocks DDR2 667 RAM at 630 MHz. I'm not sure why this happens. CPU-Z reports the proper SPD of both sets of RAM, but it doesn't reach it's actual speed without pushing the FSB up a little, and thus OCing the CPU. I've confirmed the speed discrepancy with Everest and PC Wizard. The BIOS for both says that the RAM is running at it's rated speed

My system has an AMD chipset, but the others have an Nvidia chipset. Is it the chipset, or is there a quirk in the Athlon memory controller that I don't understand? It isn't a big performance hit, but it is weird. Anybody else ever see this happen?

My System SpecsSystem Spec
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28 Apr 2010   #2

Windows 7 Ultimate x64 SP1
 
 

Quote   Quote: Originally Posted by Mellon Head View Post
I'm a little confused. I have three AMD systems in the house, 2 on Windows 7 and 1 on Vista. My own system is Phenom based, and the RAM clocks at either 800 MHz or 1066 MHz, just like it should. As reported by CPU-Z.

In my wife's machine (Asrock N-68, Athlon X2 4000) her DDR2 800 clocks at 740 MHz, and the Media Center Machine (Asus M2N-E, Athlon 3500+) clocks DDR2 667 RAM at 630 MHz. I'm not sure why this happens. CPU-Z reports the proper SPD of both sets of RAM, but it doesn't reach it's actual speed without pushing the FSB up a little, and thus OCing the CPU. I've confirmed the speed discrepancy with Everest and PC Wizard. The BIOS for both says that the RAM is running at it's rated speed

My system has an AMD chipset, but the others have an Nvidia chipset. Is it the chipset, or is there a quirk in the Athlon memory controller that I don't understand? It isn't a big performance hit, but it is weird. Anybody else ever see this happen?
Did you try those memories - wife's and media center's - on your Phenom based pc?! Try it, but it sounds like Athlon memory controller "problem".

Let us know the results!

"PLEASE REP ANYONE WHO HELPS YOU"
My System SpecsSystem Spec
28 Apr 2010   #3

Win 7 Pro x64/Win 8 Pro x64 dual boot
 
 

Well, it seems to be an Athlon problem. In the media center PC I changes out the CPU. I took out the Athlon 3500 and put in an Athlon X2 5000, and now the memory runs at the proper speed. Really weird.

And the wife's memory runs at the proper speed in my Phenom machine, so I think you're right about the "problem." Her machine won't run at speed unless I overclock it. I don't get it, but okay...
My System SpecsSystem Spec
.


28 Apr 2010   #4

Windows 7 Ultimate x64 SP1
 
 

Quote   Quote: Originally Posted by Mellon Head View Post
Well, it seems to be an Athlon problem. In the media center PC I changes out the CPU. I took out the Athlon 3500 and put in an Athlon X2 5000, and now the memory runs at the proper speed. Really weird.

And the wife's memory runs at the proper speed in my Phenom machine, so I think you're right about the "problem." Her machine won't run at speed unless I overclock it. I don't get it, but okay...
There's nothing weird... It's just a memory controller limitation. Are your doubts solved?!

"PLEASE REP ANYONE WHO HELPS YOU"
My System SpecsSystem Spec
29 Apr 2010   #5

Win 7 Pro x64/Win 8 Pro x64 dual boot
 
 

Yes they are. Thanks.
My System SpecsSystem Spec
30 Apr 2010   #6

Windows 7 Ultimate x64 SP1
 
 

Quote   Quote: Originally Posted by Mellon Head View Post
Yes they are. Thanks.
It's good to "hear" that... Don't forget to mark this thread as "solved".

"PLEASE REP ANYONE WHO HELPS YOU"
My System SpecsSystem Spec
30 Apr 2010   #7

Win 7 Pro x64/Win 8 Pro x64 dual boot
 
 

Quote   Quote: Originally Posted by Wallonn7 View Post
Quote   Quote: Originally Posted by Mellon Head View Post
Yes they are. Thanks.
It's good to "hear" that... Don't forget to mark this thread as "solved".

"PLEASE REP ANYONE WHO HELPS YOU"
Well, I would, but I can't seem to find the option to do that anywhere.
My System SpecsSystem Spec
30 Apr 2010   #8

Windows 7 Ultimate x64 SP1
 
 

Quote   Quote: Originally Posted by Mellon Head View Post
Quote   Quote: Originally Posted by Wallonn7 View Post
Quote   Quote: Originally Posted by Mellon Head View Post
Yes they are. Thanks.
It's good to "hear" that... Don't forget to mark this thread as "solved".

"PLEASE REP ANYONE WHO HELPS YOU"
Well, I would, but I can't seem to find the option to do that anywhere.
Just follow the arrow!!!




Attached Thumbnails
AMD system RAM speed question-capturar.jpg  
My System SpecsSystem Spec
01 May 2010   #9

Win 7 Pro x64/Win 8 Pro x64 dual boot
 
 

Cool. Thanks.
My System SpecsSystem Spec
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