Hi KathiMI1,
You seem to be setting this out as a fun and exciting adventure, and in my opinion, that is a wonderful tone to keep in play.
At this moment, I have a 9 year old Dell running. I got it from the dumpster behind a local business several years ago. I've changed out, Hard Drive, optical drives, floppy drives, RAM, video card, sound card, network interface card, and dialup modem and added a fan. Of course I've also used separately acquired monitor, keyboard, mouse, speakers, and peripherals like printer and scanners, as they have been "found".
What I haven't touched, is the motherboard/cpu components. Dell does allow for some "limited" upgrading of CPU, but only within their own specifications. I'd be saying something similar if I was referring to to HP, Compaq, NEC, etc. There is always a flavor of limitation that is proprietary to each brand, but it is generally limited to the CPU/CMOS/motherboard/and sometimes power supply. The other PCI and drive elements can be freely exchanged.
Your selection of RAM must be matched to what the motherboard calls for. Similarly, your selected CPU must be of a socket and form that is called for by the motherboard.
When it comes to the Tower Case, you are dealing with matching up mounting holes, screws or connectors, and spacers that seat the motherboard. Proprietary brands "may" have their own special spacers and connectors, but often they face the same choices that you must make. Most Motherboard are of the ATX form, so manufacturers have to accomodate to that fact. Beyond that, they design their case to pretty much allow the fit of the original equipment that they design into the model of machine they are selling. That means that the owner/user will have limited choices in what expansion they may want in the future.
Fortunately, the case/power supply is a relatively inexpensive item. The major consideration is providing enough room inside to accommodate the number of drives, PCI add-ins, and cooling features.
So again, you need to decide what you want your machine to be able to do and what equipment you will have to include to accomodate your functioning goal. Then go get the motherboard/case/power supply that will make that possible. Starting from a pre-existing or "branded" case may place unwanted restrictions on your future choices.
Yes, motherboard components are soldered together, and making changes is likely to be well beyond the technical and practical ability of a first-time builder. Actually, there are probably very few folks out there with the technical ability to replace a capacitor. But further, if a motherboard has experienced bulging or leaky capacitiors, it is most always cheaper to just get a new motherboard.
As to RAM, your motherboard selection will determine what RAM and how much you can use. yes the little "slots" determine what fits where, but the important feature is the type of RAM. There are several types including DDRAM, SDRAM, and others. There are speed ratings usually designated like these examples: PC133. PC2700, PC3200, PC4200, etc. Size (256mb, 512mb, 1024mb) is important, but different from type and speed of the actual stick of RAM. Each is matched to the needs and abilities of the Motherboard.
Building a machine is not the sole province of technical wizards who are over-clocking or building highly specialized extreme performance machines. Anyone can assemble a relatively ordinary machine that would be competative to and often better than what can be bought off the shelf. And doing the building yourself, can save a bit of money, though you may look back and commiserate, that you could have gotten a similar machine "on sale" and saved money.
However, a real advantage in your self-built machine, will be in your knowledge of what you have, including the quality of the components and the purpose/use goals that you built the machine to meet.
Read up on what others are building. Google is your friend here. Read and have your boys read, read, read.
Oh, and enjoy, enjoy, enjoy!
Best Regards
Edit: Can a laptop be "home-built"? Sure, but the form and specifics get more limiting and harder to pack into a prebuilt case.
Edited by dough, 15 September 2006 - 11:49 AM.