Most computers have space for 2 ram chips so this includes your 512 and 1 gb ( it should work as long as it is the correct chips for your computer)
1 gb will be batter because it will use less resources..
Actually it is quite the opposite. The more RAM you have the more speed at which data can be transferred to the RAM. An example is if you have 512 Mb of RAM then 512 Mb of data will be transferred to the RAM at a time, but if you upgrade it to 1 GB of RAM then 1 GB of data will be transferred to the RAM at a time verses the 512 Mb. So the speed at which the RAM stores data will increase if the size of the RAM is increased. I hope this answers your question.
I use 4 GB of RAM so 512 MB is about enough to load XP and that's about it. I'd recommend Linux
I take it that the 1.5 is in GB since no computer can run on 1.5MB of RAM. So the 1.5GB is higher that the 512MB RAM.
You can, it is possible, but i wouldn't, you probably wont enjoy the user experience.
512 gb of ram
512 MB = 0.5 GBHence after adding 1 GB RAM your laptop memory will be 1.5 GB.
Windows XP can use any amount of RAM, there is no exact amount. The minimum is 256 MB, the recommended is 512 MB, and the best is 1 GB +.
The smallest type of RAM would be SD - RAM which is used in laptops and the amount of RAM each card can have will be anywhere around 512 Mb up to 2 GB.
512 MB of RAM Direct x9 and....wait just don't have Mark's computer. Anything with 1 GB or RAM works awesome.
Adobe Photoshop Elements 7 requires at least 512 MB of RAM, but works best with 1 GB.
Microsoft recommends 512 MB. For most uses, you will want 1 to 2 GB.