SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Motion Graphic, 3D rendering , 3D programs, Video Editing
PARTS NOT REQUIRED: keyboard, mouse, monitor, speakers, OS
PREFERRED WEBSITE(S) FOR PARTS: newegg.com or anywhere else
COUNTRY OF ORIGIN: US
PARTS PREFERENCES: N/a
SLI OR CROSSFIRE: If it help..
MONITOR RESOLUTION: 1080p
ADDITIONAL COMMENTS: This will be mostly used for rendering 3D program like Cinema4D. CPU is usually working 100% when I rendered on my Macbook pro and temp went sooo high.. so I think I need a decent desktop.
Yes, but one comes with the CPU. If you mean "do I need a special CPU cooler", no, unless you're planning on overclocking. You can also add that later. A good couple are the Sycthe SCMG-2100 and Coolermaster Hyper 212 Plus (if it's around $30. Check Amazon if Newegg's price is much higher than that).
All AM3 boards support X6 CPUs. Some of them will just need you to update the BIOS to do it. Updating the BIOS is free, and instructions can be found either at the manufacturer's website or in the manual.
I should also point out that with an AM3 board, you could easily wait for the next line of AMD CPUs (called Bulldozer) to come out. The AM3 boards will still support them.
Overclocking doesn't really cost anything. You just need to buy an aftermarket cooler (like the ones I mentioned before). Then it's just playing around with the settings in BIOS. The real "cost" of overclocking is that you're producing extra heat in the system and pushing the CPU beyond what the manufacturer recommends. This causes the CPU to have a shorter life. It's not a huge deal though as the CPU failing is rarely the reason to replace it or move on to another build. Generally, someone would upgrade it or the entire build or something else would break before the CPU dies. Of course, this is only true if you overclock the CPU correctly (there are plenty of guides for it) and don't try to push it too far.