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How can I determine if the SD Ram I have 2 sticks of (512) can be used in a Dell Inspiron I2650

I have 2 sticks of SD Ram 512 that I would like to put in a Dell Inspiron I2650. How can I find out or how would I know if the unit could handle these two stick and bring my existing laptop up to 1 gig of RAM. The machine is actually another family member who is going back to school and needs it if it works. All I can say is it went in a Dell laptop before. Dos anyone know how to do this? Thank you very much for the support that you bring.
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Here is a computer screenshot of the Laptop. My Computer Properties.
ComputerProperties.jpg
Inspiron 2650 notebooks have 2 memory slots ---> an internal slot (on top of motherboard) and an external slot (under cover on bottom of notebook). The maximum per slot is 256MB of DDR333 RAM. So SDRAM will not work and 512MB modules are not compatible either. The Inspiron 2650 was a good example of poor design.
Your laptop has an Intel 845MZ chipset which supports 1GB of Low Density DDR200 or DDR266.
http://www.intel.com/products/notebook/chipsets/845mp-845mz/845mp-845mz-overview.htm

It's quite common for DOCs that get published before something is actually available (in this case 512MB SODIMM DDR Modules) to never get updated when it does become available later on.

The BIOS needs to support 512Mb modules too but it would be rare for that part of the code to not be updated for something like supporting larger RAM modules.

It's not guaranteed but I'd give it a 95% chance you can go to 1GB with that thing.

.
Based on my experience, I say there's a 100% chance that 512MB modules will cause a boot failure.
Must be a Dell issue then.
Too lazy to update their BIOS.
I'm running a Gateway in the shop it worked fine with.
I've done the same thing with several Intel 830MP based laptops where DOCs said 512Mb max and 1Gb worked fine.
I've had 100% success with it.
But, I don't use high density RAM and I've never tried it on a Dell.
This thread seems to confirm what willcomp is saying about 512MB being the maximum, but apparently a single 512MB module will work if that is all that is populated: http://episteme.arstechnica.com/eve/forums/a/tpc/f/579009962631/m/972009296731
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I can't believe I missed that, the I2600 used PC-133 SDRAM and the 2650 uses DDR-200.
http://support.dell.com/support/edocs/systems/ins2600/en/sm_en/remove.htm#1103387
I did not miss that however the asker only stated "SD Ram".

Both PC-133 and DDR are "SD Ram". [aka SDRAM.]

http://www.micron.com/products/dram/ddr/
So even though I have 2 sticks of 512 SD RAM they will not work with this DELL as it only uses DDR. which is slightly older technology. There is a chance that I might sneak one 512 in with a BIOS update and short prayer? Thank you gentlemen for the "Herculean effort" I did the best I could with spreading out the points. Lots to acknowledge here. Thanks
I suspect most of us know that DDR is technically synchronous RAM. We also know full well what common nomenclature is.
And if we are using common sense we know the asker is using common nomenclature.