Originally posted by emalvick There is what you budgeted and then what you might need. Computer building becomes economical the more you're willing to spend and the higher end of a PC you get out of it. Building seems to be geared towards gamers and realistically, the cost of building computers from a low end computer to a high end computer aren't that different. What ends up happening is that you can't build a low end system for nearly as cheap as what a build low end system might cost. If you plan your costs, you'll find that items such as the operating system, wi-fi card, CD/DVD drive, power supply, case, etc have a certain cost that can end up eating $200 out of a PC budget before you've even gotten to the truly important components.
This is my recommendation as well. If you're looking to spend $1000, then building your own will get you a LOT more than buying a prebuilt one. If you're looking to spend $500...it's best to invest in a refurbished one and then upgrade as you see fit. RAM can be upgraded very cheaply, for one. Hard drives are cheap.
The OS is what really will kill you. If you have one lying around you can install (or are willing to go Linux), then it's much better. Otherwise, you're looking at $100 for a new OEM copy of Windows. The cost of Windows as part of a prebuilt system...something like $15 or $20. HUGE difference. The CPU cooler is another one. Many processors come bundled with them, but the stock coolers are pretty loud. If you want a quiet one, it will set you back $30-50 or more.
Another area that chews your budget is the case. When you buy a system, you don't have to care since you don't have to work in it. Working in a bad case is a nightmare. A good case will cost $75-100, especially if you want one made of aluminum and/or one that has 120mm fans to avoid making your system sound like a jet plane about to take off. A good case will include decent fans you won't want to replace. A cheap one will have loud 80mm fans with the cheapest bearings. If you've built before, you can recycle the case (helps a lot), of course.
So, to summarize:
OS: $100
Case: $75
CPU cooler: $35
DVD drive: $15
We're at $220 and we don't have a motherboard, CPU, RAM, or power yet. Power is the one thing people often chinse on. If you buy a $50 power supply, you will probably get the pleasure of buying another one in a couple years. Of all components I've had fail, it's been the power supplies that cut out after 3 years. I usually get a small one because I've never had a big graphics card that needed anything big, but even the $80-100 ones die. I've bought major brands...Antec, Thermaltake, OCZ. Probably should have sprung for a better one than those, even.
---------- Post added 12-15-14 at 10:24 PM ----------
Originally posted by robthebloke Fast ram (2133mhz), at least 8gb. Install it in pairs - it's daft not too!
Fast RAM isn't going to make a huge difference for still images. The amount matters a lot more. Fast RAM is needed in applications where bursts of bandwidth are needed--games are the big one. Keep in mind that enterprise-class workstations use ECC RAM, usually at speeds significantly slower than the fastest RAM available. The ECC itself slows it down a lot as well. In the end, there's no real performance loss because even the bandwidth that the slower ECC RAM provides is overkill.