Whereas enthusiast PCs are high-end by definition, gaming PCs can be subdivided into low-end, mid-range, and high-end markets: video card manufacturers earn the bulk of their revenue from their low-end and mid-range offerings.
Gaming PCs can be subdivided into low-end, and high-end markets. Enthusiast PCs are high-end by definition. End is mid-range. Video card manufacturers earn the bulk of their revenue from their low-end. Video card manufacturers earn the bulk of their revenue from their low-mid-range offerings.