I'm upgrading the amount of RAM in my machine, before I purchase it, I thought I would ask does the RAM's speed have much, if any benefit for applications like Photoshop and video editing? i.e. 1333Mhz vs 2400Mhz I've tried Googling the issue, but all the results I get are from gaming forums, which aren't of much help.
Memory speed does not affect Photoshop performance much. There might be some performance gain, but it is not significant, as in, you don't actually feel the improvement. I have tried using 1600MHz and 2400MHz, but I can't feel the difference in Photoshop.
Which ver of Photoshop are you using - 32-bit or 64-bit? According to Adobe, Photoshop could benefit more than 4GB of RAMs only if both Photoshop and the OS are 64-bit versions.