Ever since this past week's update to CC, I have noticed a decrease in performance across all versions of Photoshop I have installed, CS6 and CC. Many of the brushes I have, both in Photoshop's default and my own custom sets, lag horribly when drawing. My system had not previously had this issue as far as I can tell. Just to be safe, I have tested Photoshop on other builds, a macbook pro and a near top of the line PC. The lag happens across all systems. I've tried drawing with just the mouse and the Cintiq 12WX and the responsiveness is the same.
For the sake of this case, here are the specs of my main work computer. All drivers are up to date, as is the OS:
Processor: Intel Core 2 Quad CPU Q6600 2.40 GHZ
RAM: 8 GB
Operating System: Windows 8 (64-bit)
Graphics Card: AMD Radeon HD 6700 Series
Hard Drive: Samsung 830 256 GB Solid State (where my scratch drive is)
Monitor: 2 X Dell U2410
I have tried altering the OpenGL settings and disabling them altogether on all builds, including this one. There is no change in the lag of the brushes.
For the sake of complete clarity, these are the specs of the near top of the line PC and the Macbook, which both had the same issues:
The PC:
Processor: Intel Core i5 3570K 3.4 GHz, overclocked to 4.4 GHz
RAM: 16GB DDR3 1600 MHz
Operating System: Windows 8 (64 Bit)
Graphics Card: 2 X EVGA Nvidia GTX 670 4GB SLI
Hard Drive: 2 X Samsung 840 Pro 256 GB SSD, Raid 0
Monitor: Apple 27" Cinema Display
Macbook Pro:
Processor: Intel Core i7 2.7 GHz
Operating System: OSX 10.8 Mountain Lion
Hard Drive: Western Digital 500GB 7200 RPM
Graphics: Nvidia Geforce 630M
I've also tried completely uninstalling and re-installing Photoshop CS5 and CC on my work computer, which still did not solve the issue.
I am a freelance artist and this sudden lack of performance is putting a cramp in my deadlines and possibly in my income stream, if I cannot solve this issue quickly. Please advise!