I recently upgraded my hard drives to SSD and the ram to 8gb. I purchased the Intel 320 120GB SSD for my OS and a bit of storage and a OCZ Agility 2 90GB SSD (in a good optical bay hdd caddy, nimitz) which I have broken up into 2 partitions: Which are the photoshop scratch disk 59.68gb and the one labeled storage which is 29.87gb. I have also upgrade the ram to 8gb consisting of 2 4gb sticks from corsair CMSA8GX3M2A1066C7 I have tested the ram with apples hardware tester and rember and both test pass. Okay so to the symptoms: A lot of what I do is take a RAW file from my Canon 7d and convert it in ACR then reduce the size of the file 2x and apply a two step sharpening process to the file. What is happening now is I am getting these weird halts or freezes with the pinwheel displaying doing simple stuff like applying the sharpening or finishing my measurement and applying a reduction to the photo. THIS NEVER HAPPENED BEFORE THESE UPGRADES. In photoshop under performance I have the photoshop scratch disk partition setup as the scratch disk option and only option. Could it be this is not enough for these simple tasks? Should I just try deleting the storage partition (really don't need it as I store all my files on 2terabyte external drives) and use the whole 90gb hard drive as a scratch disk. Or do you think it's my ram. Incidentally what is the most compatible ram out there for this model macbook pro? Thanks in advance for any ideas.