I want to if i can upgrade my single core Processor 2.8ghz
to dual core or some thing better
1 gb ram
If you could provide us with a link to your computer on the dell website, it would save a lot of time and effort for potential posters.
Basically, it depends on your needs. I haven't checked on the dell website, but more than likely you will be able to upgrade to a more powerful processor. But the question remains: for what?
First, there is no way that any processor you could upgrade to could provide a major performance increase or anything comparable to low-end systems today. That said, there are times when a slight performance boost is all the user will need in a specific area. For example, I had an overclocked to 2.5GHz 3200+ AMD processor. Single core. Just barely too slow to watch 1080p movies, sometimes and streaming decoding my tv signal was too slow to watch smoothly. An upgrade to a 2.7GHz sempron, would have made all the difference for my task. Would it be noticeable in anything else that isn't cut and dry "work or not work"? no.
In most cases though, the upgrade is not worthwhile, unless you can get the "new" CPU for free.
So what do you need the upgrade for?
Also, on a side note, intel never made a dual core for that socket. the pentium 4 dual core versions were only released on socket 775.
If this is true, not CPU upgrade will increase your graphics performance. You need to purchase a dedicated graphics card or save for a new computer. What you do will depend on my previous question:
What games? What resolution? What settings?