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: DDR3 compatability question

20 Jun 2011   #1
bethy1234

windows 7
 
 
DDR3 compatability question

Hello all,

I just want you to confirm that I am not making a purchasing mistake.

My mobo, ASRock M3A770DE, Supports DDR3 1600(OC)/1333/1066/800 non-ECC, un-buffered memory. It currently has 1 4gb stick of Corsair Vengeance 4GB (1x4GB)1600MHz DDR3 PC3-12800 RAM.

I wish to add 2 more 4gb sticks of Corsair 8GB (2x4GB) DDR3 1600MHz XMS3 Memory (source ebay - Corsair 8GB (2x4GB) DDR3 1600MHz XMS3 Memory Kit BOXED | eBay UK).

Can someone please confirm this would be ok, even though it additionally says XMS3?

Thank you in advance.


My System SpecsSystem Spec
.
20 Jun 2011   #2
Phone Man

Windows 8.1 Pro w/Media Center 64bit, Windows 7 HP 64bit
 
 

The Vengeance runs at 1.5v and the XMS3 runs at 1.65v so it may be a problem getting them both to run at 1600 CL9 as rated.

Jim
My System SpecsSystem Spec
20 Jun 2011   #3
Beta

Windows 7 Pro x64 SP1 and Mac OS X 10.8.3
 
 

1 would buy another 4gb stick of Corsair Vengeance 4GB (1x4GB)1600MHz DDR3 PC3-12800 RAM. This way you will not run into any issues and I will run in duel channel. Just make sure the full part number are the same. Corsair makes alot of revitions.
My System SpecsSystem Spec
.

21 Jun 2011   #4
bethy1234

windows 7
 
 

Phoneman/Beta,

you have both taught me something in terms of voltages and dual channels. I am now inclined to buy Corsair Vengeance DDR3 memory (2x4GB) | eBay UK based upon what you have now told me.

Thanks
My System SpecsSystem Spec
21 Jun 2011   #5
Phone Man

Windows 8.1 Pro w/Media Center 64bit, Windows 7 HP 64bit
 
 

I assume you are running Windows 7 64bit as 32bit wont see anything over 4GB.

I would go with this one. I think it is the same you have now and you would then have 1 stick in each channel. Three sticks would not be the best solution as AMD CPUs have shown problems with more than 2 sticks of memory especially at speeds above 1333.

Corsair CMZ4GX3M1A1600C9 4GB 1600MHzCL9 DDR3 Vengeance | eBay UK

Jim
My System SpecsSystem Spec
21 Jun 2011   #6
Dwarf

Windows 8.1 Pro RTM x64
 
 

If wanting to go with dual-channel, I would buy both modules as a matched kit, as they would then be certified to work correctly together. Even seemingly identical modules (same model/manufacturer) may or may not work correctly together if purchased separately. See DDR2 Memory Issues Affecting System Reliability for a similar thread on the subject.
My System SpecsSystem Spec
21 Jun 2011   #7
bethy1234

windows 7
 
 

Hi phoneman,

Thanks for your advice, I want to buy two of the items you suggest, taking me upto a total of 12gb. Ultimately i will goto 16gb when i can afford it, as the board states it can go that high. What is this about problems above 8gb at speeds above 1333? Could i potentially change the ram speed of the 12gb so the system is stable some how? I have just installed a "AMD Phenom II X4 965 3.4Ghz Black Edition" cpu for your info.


Hi Dwarf,

I will take your advice onboard and read your suggested link.

Thanks guys - I hope you don;t mind me asking such amateur questions.
My System SpecsSystem Spec
21 Jun 2011   #8
Dwarf

Windows 8.1 Pro RTM x64
 
 

You're welcome.

As regards the question you posted above, at higher memory speeds timing becomes more and more of an issue. If you look closely at your motherboard, you will see that the tracks between the RAM slots and the memory controller, be it the Northbridge or the CPU itself, tend to zigzag a lot. This is to ensure that signals from/to the furthest slot arrive/leave at the same time as the nearest one (in between slots are similarly connected and arranged). Unfortunately, because of the physical constraints of the motherboard, there is a limit to this. In an ideal world, if you were able to straighten out all the data lines between the RAM slots and the controller, you would find that the lengths would be absolutely identical. In practice, you would find that the lengths could vary by upto 2mm or so. It doesn't sound much, but at higher and higher frequencies this variation in length becomes more and more significant. Not to mention the inductive and capacitive crosstalk that can occur at higher frequencies, a feature utilised in many older TV UHF tuner modules where the inductors were simply tracks on the PCB and capacitors (in the coupling sense) were 2 or more such tracks in parallel with each other. To overcome this, many motherboards will limit the maximum speed when more than a specified number of slots are used.
My System SpecsSystem Spec
21 Jun 2011   #9
Phone Man

Windows 8.1 Pro w/Media Center 64bit, Windows 7 HP 64bit
 
 

Also the current AMD CPUs have the memory controller in the CPU and is designed to run at 1333. Since you have a newer version of the CPU you may not have a problem. If you do you can try and change your memory to the slower 1333 speed. There are other tweaks that may work also but many people have no problems.

Jim
My System SpecsSystem Spec
21 Jun 2011   #10
bethy1234

windows 7
 
 

Hi dwarf/phoneman,
thanks once again for your input. I think what i will need to do is try and find a forum for my mobo and ask others what their performance is like with additional ram, if any of them use my cpu that is.

Thanks for educating me.

Regards
My System SpecsSystem Spec
Reply

 DDR3 compatability question




Thread Tools




Similar help and support threads
Thread Forum
PS & Motherboard, and processor compatability question
Hi, I ordered a power supply like this CORSAIR HX Series HX1050 1050W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Corsair CP-9020033-NA Power Supply New 4th Gen CPU Certified Haswell Ready - Newegg.com and wanted to make sure it will be compatible with this...
Hardware & Devices
compatability question
I have just bought Kaspersky Internet Security multi-device from PC World (UK) at a very good price to use on 5 pcs running 7 and8.1. I will be discontinuing use of security essentials / windows defender but would like to keep using Malwarebytes free edition. Will there be any compatability issues?
System Security
Memory Compatability Question
Hi there, I have a Dell Inspiron M5030 laptop which I'd like to add some memory to. I've looked round and I think it needs 204 Pin 1.5v DDR3 PC3-10600 SoDimm. I have one 4G memory card (which I bought for a different laptop just before it went faulty and was replaced by a different model)....
Hardware & Devices
DDR3 RAM Speed question
Hi guys, A few months ago I started a thread about my PC rebooting a few times while loading windows, see it here. This issue still hasn't been sorted. So I ended up taking one 2gb RAM stick out and selling it to a friend (works perfectly in his PC) and that solves my problem too. So...
Hardware & Devices
Question about DDR2 vs DDR3
Hello everyone i got a quick question for you memory pro's . I am currently running ddr2 800mhz but my board can support higher ,would it be wise to upgrade to the higher speed ram ? Or should i stick with planing to buy a new board and new memory all together, meaning a board that supports...
Performance & Maintenance
Question about Firefox compatability with toolbar
Hi, I'm a newbie with a problem. ;-) I use Firefox v. 3.6.3 and Windows 7. I have Firefox pinned to my toolbar, and I haven't had any problems with it that I know of. However, every once in a while, when I click on the icon on the toolbar to open Firefox, a little window pops up saying they are...
Browsers & Mail


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 17:44.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App