First post, so please be gentle!
I will be getting a new GTX 570 (when I upgrade to i7 2600K) but am a little confused as I've read so much on the different branded cards/models available (e.g. reference vs non-reference, etc). I've read that it's best NOT to over-clock the card - in much the same way that it's best NOT to over-clock the CPU. However, there are many 570 cards available that are factory overclocked by as little as just 10MHz from the reference speed. I can understand that this deviates slightly from the reference, but in the real world would I be fairly safe to purchase a card such as this for basic home video-editing purposes (I don't do gaming)? I just need to put my mind at rest, before deciding which specific brand / model to get, as there are soooo many out there. Any advice on what other things to look out for in a card would be useful too - HDMI vs mini-HDMI?; etc.
Thanks in advance.
Clock speed of the GPU is almost irrelevant, since even with hardware MPE the GPU is so much faster than other components in the system, that its utilization is far less than 100% and with an i7-2600K, even heavily overclocked, it is likely never to attain more than 50% utilization. What you should look for is cooling capacity, price and warranty period. If you doubt between for instance the 560, 570 and 580, then number of cores has a much bigger impact than clock speed.
I really appreciate your time in responding. I'll get the cheapest card with lots of cooling from the manufacturer with the best warranty.