computer says PC2 6400, but lenovo says PC2 5

July 11, 2011 at 15:55:35
Specs: Windows 7, intel 2140@1.60GHz/2GB RAM
When I scan with Crucial or go to Lenovo and plug in model number, it says memory is DDR2 SDRAM PC2-5300 667MHz but when I go into the computer's system info, it says DDR2-SDRAM PC2-6400/800 MHz
This computer is in desperate need of more memory, so I'm trying to buy the right memory. If I can run at 6400, seems like that would be better. How can I tell who's right? Not being experienced at this, I'm not excited to pull out the memory chip to look at it -- could I even tell on there?

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#1
July 11, 2011 at 16:14:44
Is this a laptop or desktop? Are you running the 64 or 32 bit version of windows 7? I would trust my system info over crucial. It will be marked on the chip itself. Disconnect the power and ground yourself before going into the case. If it's a desktop, press down on the two white levers on each end of the ram. The chip should pop right out. look at the notches and remember how it came out. look at the label to be sure what it is. Then you can order more. You could also download and install SIW from here. This is an excellent tool for many purposes.

http://download.cnet.com/SIW/3000-2...

You can't use more than 3 gigs of ram for the 32 bit version of windows. Only the 64 bit version will utilize more ram.


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#2
July 11, 2011 at 16:16:30
We need to know your system model number or your motherboard model number. But be aware that if you pair up RAM of different speeds, the slower always wins out. In other words, DDR2-667 + DDR-800 = DDR2-667.

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#3
July 11, 2011 at 18:15:30
Thank you both. This is a Lenovo Thinkcenter desktop J200 96905AU 32-bit Windows 7

I've tried SIW and it agrees with the system info I was getting off the computer. DDR2 PC2-6400, 400Mhz (DDR2 800Mhz) in spite of what Lenovo website says about this model.

But either way, I can't add another 2Gb card because of it being 32-bit?


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#4
July 11, 2011 at 22:21:52
Ddr2 800 is the perfect memory to purchase(ratio 1:2).
If 4gb memory is installed with 32bit os, only 3gb(depending on your hardware) will be recognized and used. If go to BIOS u will see 4gb because this is only os limitation.

We can not fight new wars with old weapons, let he who desires peace prepare for war - PROPHET.


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#5
July 11, 2011 at 22:25:18
Thank you. You all are very helpful!

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#6
July 12, 2011 at 04:46:47
You're welcome, and thanx for posting back.

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#7
July 12, 2011 at 04:56:21
DDR2-800 is the correct RAM to pair up with your CPU, but if you install it along with the DDR2-667, it will run at DDR2-667 speed (333MHz). That will make the CPU:DRAM frequency ratio 200:333 (3:5) which is less than optimal. Also, being that you're running the 32-bit version of Win7, if you add another 2GB for a grand total of 4GB, only 3.0-3.5GB will be recognized.

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#8
July 12, 2011 at 08:47:21
I guess unless I were to install a 64bit version of Win7, all I can do is hope that 3-3.5Gb will be enough make this beast run decently.
Any opinions on whether refurbished RAM is worth buying, or is that kind of a crap-shoot?

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