I have created a multi-layered UI PSD that's 26.7MB in size. When I open it, the "Reading Photoshop Format" UI comes up for ~3 minutes and it takes more than 4 minutes to finish the load. It eats 5.5GB of my RAM, and writes 99-100% to my DDrive the whole time, creating a 19.8GB scratch file. The dialogue disappears, and the mouse stutters for about 20 seconds and then I can actually interact with Photoshop.
What's going on here and how can I fix this? It's not saved to be compatible and was created in CS6 from scratch.
It's nearly unusable now. Something is very wrong. I have no other issues with my system or software.
This is on a 4GHz 12GB of RAM Win8 x64 system.