Hi, I bought a mac Mini 2.3ghz with an HDD of 500go 11 months ago. I changed the RAM from 2go to 8go (kingston DDR3) and I added a SSD crucial 256go (M4-CT256M4SSD2) myself at the same time, a few days after buying the CPU. Here's my problem : since I installed the SSD and the RAM, I've had difficulties with my system ; the beachball appears every time I download big files (more than 3go) and play with more than 3 applications ; and the genius effect started today to slow down (only with Safari so far). I don't know much about computers, so I really don't know if the lagging (beach balls) is caused by the RAM, the SSD or a logic board default for example. What do you think ? DO you think I messed something up when I installed the SSD ? or is it only the SSD that is starting to die ? I would buy another SSD if somebody could tell me that's the problem ; but is it possible to know it without going to the repair shop ? Your help would be much appreciated, as always. Thank you very much.