For now I've been using Paint Tool SAI for drawing, but I bought Adobe Photoshop CS6 lately and I noticed intolerable lagging while drawing with standard brushes. Delay is even bigger when I choose '3D' brushes. My PC specification:
- 6-core 3.7GHZ AMD CPU
- 24GB DDR3 RAM
- 2x128GB Samsung SSD in RAID 0 config
- 4x2TB WD Caviar SATA III HDD in RAID 1+0 config
- nVidia Quadro 2000 with three full HD screen
- Windows 8 Pro
I'm using Wacom Intuos4 with standard pen. Photoshop and all drivers are up to date. And the hardware acceleration in PS is enabled. CPU usage is never bigger than ~5% while drawing, and canvas size is about 3000px square. I was seeking through all performance settings in Photoshop and I have no idea what I'm missing, especially that my computer isn't the slowest one...