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Windows 7: CZ Platinum DDR2 1066 only runs at 800MHz

03 Dec 2009   #1

Windows 7 x64 finally!
CZ Platinum DDR2 1066 only runs at 800MHz

I don't think this is a Win7 issue, and ask the mods to delete if not applicable.

But if somebody can help, I appreciate. I posted this at the OCZ forum 5 days ago and no answer (I think I am spoiled.... used to the good performance of the SF members):

Some time ago I installed OCZ Platinum 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 OCZ2P10664GK in my system.

Theoretically it should run at 1066MHz, but it only runs at 800MHz. Motherboard (Asus M4A78 plus) manual says it supports DDR2 1066 with AM2+ / AM3 sockets, I have a AMD Athlon II X2 245 Regor 2.9GHz 2 x 1MB L2 Cache Socket AM3.

Mobo manual also says it will only support 1066 with one DIMM per channel. I tried in dual channel, one DIMM per channel and only one DIMM (only 2GB), no change.

I have tried some Overclocking settings (5-5-5-18; 2.2V; 533MHz), but all I get is the system refusing to boot

Am I missing something? Is it supposed to work at 1066MHz or not?

Thanks in advance

My System SpecsSystem Spec

03 Dec 2009   #2
Microsoft MVP

Windows 7 Ultimate 32bit SP1

I read this on another forum:
To acheive 1066 with this RAM kit you need to adjust your DRAM voltage to {2.1 - 2.2 volts} . Unfortunately there is
no capability to adjust this on your motherboard. You will have to upgrade your motherboard or run at default 800 Mhz speed.
The Mother Boad referred to was - asrock a780gxe/128m
My System SpecsSystem Spec
03 Dec 2009   #3

Windows 7 64bit

It's not Windows's your motherboard and/or settings. I have 8 GB of that memory running on an Asus PK5-E motherboard at 1066mhz. Go to the OCZ website and then to their forums. Several of the techies from OCZ hang out there and offer settings for various boards. You can always send them an email with your particulars.
My System SpecsSystem Spec

03 Dec 2009   #4

Windows 7 x64 finally!

Tks Jacee. My board can be configured, maybe I ought to try only the voltage. With changes on the other parameters, it won't boot

Tks Carl. I did that, no response at all. I will try emailing
My System SpecsSystem Spec
03 Dec 2009   #5

7 Prof

DDR2 1066 is not officially recognized by JDEC which is the org. that regulates RAM related stuff. When manufacturers rate RAM @1066, they're really saying that they tested the stuff to run at that bus, but when you put it into the board, it will only run @ 800. So what you have to do is set the bus manually, which you did, and because you set it correctly, the only thing that leaves is the board's limitation. Given this: DDR2 1066*/800
(Due to AMD CPU limitation, DDR2 1066 is supported by AM2+/AM3 CPU for one DIMM per channel only), you might visist Asus's forums and ask around. Sorry I couldn't be of more help.
My System SpecsSystem Spec
03 Dec 2009   #6


ASUSTeK Computer Inc.

I just had a look at the M4A78 PLUS Memory Qualified Vendors List (QVL)

And I saw no mention of any RAM supporting 1066 - It's not looking good mate

Could you post a screenshot of CPU-Z's SPD tab?

Name:  CPU-Z SPD Tab.JPG
Views: 498
Size:  115.9 KB

If it can't be run at 1066, you may be able to at least tighten the timings a bit.

My System SpecsSystem Spec
04 Dec 2009   #7

Windows 7 x64 finally!

Tks Ragzarok, it helps. I tried their forums, but no answer so far. I also emailed them yesterday, let's see what they say

SEB, I will do it tonight when I get home. I did it and remember I had 4 timings on the table, the last one being 533MHz, at 2.1V. But I will double check.

In the board's manual they have a few supporting 1066MHz. I downloaded that QVL and it makes no sense, it is like it is missing pages. Also the 1200MHZ O.C. feature is new, but there they say to use both modules in the yellow slots, while they say you need to have one per channel for 1066. Even less sense. Unless they mean to O.C. a 800MHz to 1200MHz? I know close to nothing about O.C., but this sounds strange...

Tks again, more later
My System SpecsSystem Spec
04 Dec 2009   #8

Windows 7 x64 finally!

Here you go. It has 1066MHz capability, I just need to find out how to set it up
Name:  CPU-Z.PNG
Views: 76
Size:  78.6 KB

My System SpecsSystem Spec
04 Dec 2009   #9

Windows 7

hey guys i am also having the same problem. Mine is 800 MHz Transcend Ram but it shows 400 only.

Attached Images
My System SpecsSystem Spec
05 Dec 2009   #10

7 Prof

lol, it shows 400 because that's the speed of dual channel RAM, 400x2=800mhz.
My System SpecsSystem Spec

 CZ Platinum DDR2 1066 only runs at 800MHz

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