For example if you are a much heavier user of Lightroom, I would choose processor over GPU. If you have already maxed out your RAM and storage options, I would then decide which program speed and efficiency are more important to you. Photoshop generally runs faster with more processor cores, although some features take greater advantage of the additional cores than others. Photoshop CS5 and CS6 require a multicore Intel processor (Mac OS) or a 2 GHz or faster processor (Windows).
#ADOBE LIGHTROOM REQUIREMENTS DRIVER#
Other features use the video card for acceleration and if the card or driver is defective those features will run more slowly. Some features require a compatible video card to work if the video card or its driver is defective or unsupported, those features will not work at all.
Photoshop CS6 does utilize the graphics processing unit for enhanced performance. Additional RAM and a faster processor, in particular, can yield significant performance benefits. The minimum system requirements to run Lightroom are just that: the minimum you need for Lightroom to operate. Built-in, default cards that ship with most desktop or laptop systems typically suffice for Lightroom. Lightroom requires a video card that can run the monitor at its native resolution. It is outlined in the Lightroom documentation here. Lightroom does not currently utilize the GPU for performance improvements. You are asking two very different questions, because Adobe Photoshop Lightroom and Adobe Photoshop of course do not have the same system requirements or use the same system resources.