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Usually, it is not possible to upgrade the cpu on a laptop. In rare cases where it is possible the upgrade usually costs nearly as much as a new laptop.
However, you can significantly upgrade the laptop's performance by adding more memory and by replacing the old slow hard drive.
Your Sony VGN-Z250 is usually supplied with 3GB of RAM memory. You can replace the existing memory modules with a new kit consisting of 2 x 2GB modules (total 4GB). The type of memory you need is "SO-DIMM" (meaning laptop size) DDR3 - 1066MHz (you may use 1333MHz memory but it will only run at 1066MHz speed). I would suggest either G-Skill or Crucial brand memory. And you can replace the hard drive with an SSD. You'll be amazed at the boost this provides, seriously. I would suggest either Samsung 840 EVO or Sandisk Ultra for an SSD. Both offer super-fast performance compared to your old spinning hard drive, and both have very low power consumption so they run cool and give your laptop a few extra minutes of battery power. You can clone/copy your existing Windows setup onto the SSD using free Macrium Reflect software or free software from the SSD maker's website. Or, you can do a fresh install of Windows.
The Samsung N150 Laptop comes installed with 1GB of
Memory and can be upgraded to a maximum of
2GB Memory. This computer has 1 (one) SO-DIMM memory slot, so to upgrade to 2GB of RAM, you will need to replace the installed RAM module with a single 2GB PC2-5300 DDR2-667 200pin SDRAM SO-DIMM memory module.
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Sony VAIO VGN-FS 760/W supports PC-3200 400MHz and PC2-4200 533MHz DDR2 RAM Expandable up to 2GB. Please make sure that both RAM Chips are according to the above specification, compatible with yout system and both sticks are the same (make & bus speed). Try using one RAM at a time and swaping RAM slots to see if the amount of memory is shown correctly. Memory is not recognized only when it is not up to the specifiction. If the RAM sticks are ok, the system shoud recognize them.
Let me know if any further clarification/ assistance is required. Good Luck! Hope this helps! CreativeTECH
I checked the information and found that the computer does not qualify for a Windows 7 Upgrade from Sony. But as we have tried, Windows Vista drivers work with Windows 7 as the core for both the OS is same. I suggest that you download install Memory Card driver for Windows Vista from the below link to resolve the issue with the SD Card. I have also provided the link to download Sony Shared Library which you should install first.
Your laptop's RAM is upgradeable to up to 4 GB using two DDR2 533/667 MHz SODIMM modules.
So your upgrade options here are: 1. Buy a 1 GB DDR2 533/667 MHz SODIMM module & install it to get a total RAM of 2 GB (Price around US$ 25). 2. Buy a 2 GB DDR2 533/667 MHz SODIMM module & install it to get a total RAM of 3 GB (Price around US$ 45).
As if now windows 7 drivers are not available but you dont have to worry because Basic system functionality should be automatically enabled with the
drivers included within the Windows 7 operating system.
However, if one of the drivers that came with the operating system
does not work with your system, you can try installing the Windows Vista
version of the driver provided by Sony for your model. Many of the
Windows Vista drivers are compatible with Windows
7 based on current testing. Make sure you choose the bit version
(32-bit or 64-bit) that matches your version of Windows 7.
For for driver download visit this website : http://esupport.sony.com/US/perl/swu-list.pl?mdl=VGNN250E
For information about windows 7 upgrade visit this website : http://esupport.sony.com/US/perl/select-system.pl?PRODTYPE=24
Thanks to Microsoft Knowledge Base for help with my answer:
First, find out what the maximum amount of memory is. This is generally listed by most of the manufacturers. This will let you know what upgrade potential the system has. Next, determine how the memory configuration is when you buy the system. For example, a laptop that has 2GB of memory can be configured as either a single 2GB module or two 1GB modules. The single memory module allows for better upgrade potential because by adding another module you are gaining more memory without sacrificing any current memory. Upgrading the two module situation with a 2GB upgrade would result in the loss of one 1GB module and a memory total of 3GB.
Older laptops can be VERY fussy about the memory ... you have to have the exact same 'speed' .. I had a similar problem after trying to upgrade an old machine that took slow memory (PC100) with a FASTER (PC133) module ...
NB> Some VERY old machines would not take 'double sided' modules ... check the manufacturers specs ..