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Windows 7: Can I Use PC3-12800 RAM With a PC3-10700 Motherboard?

2 Weeks Ago   #1
Mohanned Aladin

Windows Home Premium
 
 
Can I Use PC3-12800 RAM With a PC3-10700 Motherboard?

Hello,

I'm not particularly familiar with RAM upgrades for laptops. My Laptop has a motherboard which supports 4GB PC3-10700 (667 MHz) RAM. Will the 8GB PC3-12800 stick work in it?

Thank You,

MohaNNed






Attached Thumbnails
Can I Use PC3-12800 RAM With a PC3-10700 Motherboard?-fujitsu-lifebook-ah531-gfo.png  
Attached Images
Can I Use PC3-12800 RAM With a PC3-10700 Motherboard?-ram.png Can I Use PC3-12800 RAM With a PC3-10700 Motherboard?-8gb-pc3-12800.jpg 
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2 Weeks Ago   #2
wither 2

Windows 7 Pro SP1 64 bit
 
 

The best I can tell is that the RAM you have is 204 pin but the stick you want to replace it with is 240 pin. I think you would be best off asking Fujitsu. Not sure why you want to go to 8 GB. Unless you do something that benefits from that much RAM, I think 8 GB is overkill (just my opinion).

I should correct myself- I didn't look closely at the image of the memory stick you wanted to use. I see that it is 204 pin.
My System SpecsSystem Spec
2 Weeks Ago   #3
Mohanned Aladin

Windows Home Premium
 
 

Quote   Quote: Originally Posted by wither 2 View Post
The best I can tell is that the RAM you have is 204 pin but the stick you want to replace it with is 240 pin. I think you would be best off asking Fujitsu. Not sure why you want to go to 8 GB. Unless you do something that benefits from that much RAM, I think 8 GB is overkill (just my opinion).
I have a single channel, that means i can't add more than one RAM to my motherboard and i have 4 GB installed, so if i want to upgrade my memory i need 6 GB or more and i don't think there is 6 GB RAM (i didn't find it) so i chose 8 GB (maximum memory). I need that RAM for some engineering programs to work faster like AutoCAD and Revit

Thanks for your reply, Wither
My System SpecsSystem Spec
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2 Weeks Ago   #4
iko22

Windows 7 x64, Vista x64, 8.1 smartphone
 
 

Quote   Quote: Originally Posted by wither 2 View Post
The best I can tell is that the RAM you have is 204 pin but the stick you want to replace it with is 240 pin. I think you would be best off asking Fujitsu. Not sure why you want to go to 8 GB. Unless you do something that benefits from that much RAM, I think 8 GB is overkill (just my opinion).
204 pin is Laptop memory
240 pin is desktop memory

Ive seen benefits of installing 6-8GB of RAM. Helps with browsing web with multiple tabs open, and helps with some applications.

Quote   Quote: Originally Posted by Mohanned Aladin View Post
I have a single channel, that means i can't add more than one RAM to my motherboard and i have 4 GB installed,
Not quite so. Two single channel memory sticks will work side-by-side. Provided they are technically identical in every other way. Two Single channel modules wont be quite as fast as two dual channel modules.

According to the link you provided, your Lifebook supports two RAM slots. So you could purchase a second 4GB DDR3 204-pin RAM module and install it.

According to the link you provided, your Lifebook supports two RAM slots.
My System SpecsSystem Spec
2 Weeks Ago   #5
Mohanned Aladin

Windows Home Premium
 
 

Quote   Quote: Originally Posted by iko22 View Post
204 pin is Laptop memory
240 pin is desktop memory

Ive seen benefits of installing 6-8GB of RAM. Helps with browsing web with multiple tabs open, and helps with some applications.



Not quite so. Two single channel memory sticks will work side-by-side. Provided they are technically identical in every other way. Two Single channel modules wont be quite as fast as two dual channel modules.

According to the link you provided, your Lifebook supports two RAM slots. So you could purchase a second 4GB DDR3 204-pin RAM module and install it.



According to the link you provided, your Lifebook supports two RAM slots.
You are absolutely right

You really surprised me because i opened my laptop MANY times and didn't notice there's another single channel under the installed memory, then i thought i can't add more than one memory and to make sure of what i thought, i installed CPU-Z and Speccy and they showed your channel is single. To be honest i saw the number of slots but i ignored them because i did't understand what they meant.

I told my friend "unfortunately i can't add more than one ram" and he asked "what's your laptop model?" after i told him he kept telling me "i think you're wrong you can add another memory" and i kept telling him "no i'm sure i can't" when i read your reply, you made me immediately shut down my laptop and open it and then i noticed the other single channel under the installed memory.

i was going to buy 8GB PC3-12800 this week, but you saved my money thank you Now i need a second 4GB PC3-10700 RAM and if i found 4GB PC3-12800 RAM and i use it with 4GB PC3-10700 RAM, i can potentially have instabilities or crashes/reboots due to RAM incompatibility, is that correct?


Attached Thumbnails
Can I Use PC3-12800 RAM With a PC3-10700 Motherboard?-another-single-channel-under-installed-memory.jpg  
My System SpecsSystem Spec
2 Weeks Ago   #6
iko22

Windows 7 x64, Vista x64, 8.1 smartphone
 
 

if you found a 4GB PC3-12800 (204 pin) and tried to use it @1600MHz along side the 4GB PC3-10600 (204 pin) , then yes you would see instabilities. Your computer's motherboard might not support that much speed however, so you might not even see the option to try this out.

All DDR3 RAM will work at the slowest speed. That just means, from a compatibility point of view, that there is no point in buying faster RAM.

So, to answer your question. From a cost and performance point of view, you'd be better off buying a second 4GB PC3-10600 RAM, because when installed properly, it should give you 8GB total RAM.

Looking at your photo, it might be difficult to place a RAM module into the first slot, because the second slot is already occupied.

So you might want to take out the RAM module from the second slot, and place it into the first slot, before buying any extra RAM.
My System SpecsSystem Spec
2 Weeks Ago   #7
Mohanned Aladin

Windows Home Premium
 
 

Quote   Quote: Originally Posted by iko22 View Post
So, to answer your question. From a cost and performance point of view, you'd be better off buying a second 4GB PC3-10600 RAM, because when installed properly, it should give you 8GB total RAM.
I think you meant 4GB PC3-10700 RAM? Or
Did you mean i can use 4GB PC3-10600 RAM with 4GB PC3-10700 RAM together? Or
PC3-10600 and PC3-10700 is the same thing

What about type of memory is it must have be the same as the installed memory?
My System SpecsSystem Spec
2 Weeks Ago   #8
iko22

Windows 7 x64, Vista x64, 8.1 smartphone
 
 

I mean DDR3 PC3-10600 1333MHz 204-pin SODIMM, like what is stated on the link you provided in your first post on this thread.

I.ve assumed that you have 64-bit version of Windows. I thought I read it in your system specs. Can you confirm that youi have a 64-bit OS?

Yes, you can use 4GB PC3-10600 RAM with 4GB PC3-10700 RAM, but the system will probably only be stable at 1333MHz.

DDR3 PC3-10600 and DDR3 PC-10700 are the same type of SDRAM, but they exhibit different clock speeds, and maybe different latencies.
My System SpecsSystem Spec
2 Weeks Ago   #9
wither 2

Windows 7 Pro SP1 64 bit
 
 

From Tomshardware.com-

"The problem comes with "rounding" and was first noticed with DDR-266 (PC-2100). The data rate of 266 MHz is actually 266.6 (continuously repeating decimal) megahertz, so the true transfer rate was 2133 MHz.

Today's DDR3-1333 has a peak bandwidth of 10666 MHz, which can be improperly rounded down and called PC3-10600, rounded up to be called PC3-10700 or stated without rounding as PC3-10666 depending on the manufacturer's desires."
My System SpecsSystem Spec
2 Weeks Ago   #10
Mohanned Aladin

Windows Home Premium
 
 

Quote   Quote: Originally Posted by iko22 View Post
I mean DDR3 PC3-10600 1333MHz 204-pin SODIMM, like what is stated on the link you provided in your first post on this thread.

I.ve assumed that you have 64-bit version of Windows. I thought I read it in your system specs. Can you confirm that youi have a 64-bit OS?
But Speccy showed my RAM is 4GB PC3-10700, so what should i choose if find both of them (PC3-10600 and PC3-10700)?

Yes i have 64-bit OS.


Attached Images
Can I Use PC3-12800 RAM With a PC3-10700 Motherboard?-ram.png 
My System SpecsSystem Spec
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 Can I Use PC3-12800 RAM With a PC3-10700 Motherboard?




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