I currently have an older HP Pavilion p6733w-b desktop, with an ATI Radeon HD 4200 embedded in it. Adobe Photoshop CC complains about the lack of sufficient VRAM, but I also need the ability to drive two monitors (DVI or HDMI) and I need OpenCl. My desktop is running Windows 7 64-bit, with 16 GB of RAM, but I'll probably upgrade to Windows 8.1 by late July. I don't do any gaming... just Adobe Photoshop & Premiere, on this box.
So, what I want is to buy a cheap upgrade that meets those minimal requirements, plus it has to have 1 GB VRAM (512 MB would be enough, if the price difference is large), and work on PCIExpress x 16. Can anyone suggest a video card that will meet those criteria, and will be easily available for purchase somewhere? This is not my main computer, so I want to spend as little money as possible on this.