PLEASE HELP! What type of video/graphics card do i need?

Hi, I have a channel on youtube and render times for HD in sony vegas are doin my head in, so i pulled some money and my dads computer from work, and im looking to upgrade the components. So far i have:



Motherboard:

http://www.amazon.co.uk/dp/B002LFYYAY/ref=asc_df_B002LFYYAY3781834?smid=A3P5ROKL5A1OLE&tag=googlecouk06-21&linkCode=asn&creative=22206&creativeASIN=B002LFYYAY



CPU: http://www.dabs.com/products/amd-phenom-ii-x4-840-mhz-8mb-95w-7BT3.html?utm_source=google&utm_medium=product+search&utm_content=Q200#



2 HDDs: 2 500GB SATA



DVD Drive ect...



do i need a good graphics card or video card or what??



Do i actually need a video card or graphics card? or can i just get some cheap ones and upgrade my cpu?



I really dont want to spend too much, and i will ONLY use this pc for rendering!

so any suggestions will be much appreciated! Thanks|||Well, rendering and video encoding depends primarily upon your CPU and RAM (8gb MINIMUM), not your graphics card. Although you do need something at least entry-level for applying effects, integrated graphics just suck. I'd recommend a Radeon HD 5570 or 5670, but you don't need a $150 card for that sort of work.

http://www.newegg.com/Product/Product.as…

http://www.newegg.com/Product/Product.as…



The biggest improvement in rendering times would come from having a more powerful CPU...this is a task where a Phenom II X6 processor would really pay off. Of course a 2nd-generation Intel Core i7 (or even an i5) would be even better, but that would require a whole new motherboard.



Also if you're doing HD I'd imagine 500gb drives will fill up fast...



http://www.anandtech.com/bench/Product/1…