之前說過了，PS大部份的work load其實都不會用到GPU加速，樓主就看看自己的使用需求決定吧
以下是擷取自官網FAQ，PS中會用對GPU加速的功能
Features that won't work without a GPU
If your graphics processor is unsupported or its driver is defective, the following Photoshop features won't work:
Perspective Warp (more info)
3D
Oil Paint
Render – Flame, Picture Frame, and Tree
Scrubby Zoom
Birds Eye View
Flick Panning
Smooth Brush Resizing
Features that require a GPU for acceleration
Lens Blur (more info)
Artboards
Camera Raw (more info)
Image Size – Preserve Details
Select Focus
Blur Gallery - Field Blur, Iris Blur, Tilt-Shift, Path Blur, Spin Blur (OpenCL accelerated)
Smart Sharpen (Noise Reduction – OpenCL accelerated)
Select and Mask (OpenCL accelerated)
Photoshop graphics processor (GPU) card FAQ
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