Windows 7: ati radeon 4350 (512) not enough memory?!

Hi I have this computer:
Pentium(R) dual core CPU e5300 @ 2.60GHz 2.60 GHz
(RAM) 3.00GB
Ati radeon HD 4350 512 ram

When I try to, for example, create a planet in photoshop(small document) at the end when I try to save my work I get a message that there is not enough memory and couple of hours work goes to waste.Is it possible somehow to tweak my Windows 7 so I can do this?Pleasae I just got this upgrade few months ago and I don't have resources to do a new one.

It would help if you could fill in your system specs in your profile area. This will definitely help us provide better help with your specific issue. Is this a desktop or laptop? Is this a 32 bit or 64 bit system? From the looks of your hardware specs for your post, I think your GPU might be under powered for that type of 3D rendering your trying to accomplish. I think that card is just a basic GPU for general graphics rendering applications...for your every day needs on a PC. You might want to look into a more upscale GPU that can handle that type of 3D graphic intensive software...this types of cards are not just for gaming anymore they are excellent 3D work related software, which is almost a must have piece of hardware now days.

My seller guarantied me that it will be enough for the type of work I do.Its basic rendering of a sphere in photoshop I make space art, its not professional, thats way I don't want to invest more.I'll fill the system specs soon.