The /r/pcmasterrace subreddit is an interesting place, where over 12,000 gamers responded to the PCMR survey in July and August with some interesting results.
First, 67.7% of respondents said they use an NVIDIA GeForce video card, while 28.9% use an AMD Radeon video card of some sort, leaving 3.4% saying they use the integrated GPU on their Intel CPU. Speaking of CPUs, 80% of PCMR use an Intel CPU while 20% use an AMD chip. Full HD is the resolution of choice with PCMR respondents, with 66% using 1080p. Just 6% of PCMR uses 1440p, while 1.9% use a 4K monitor.
Multi-monitor setups are gaining traction with 43.2% using two monitors, 9.8% using a triple-monitor setup but 45.4% are still using a single monitor. Interestingly, 15.8% of PCMR uses a 144Hz monitor of some sort, which is the second largest outside of the huge 69.3% that use a 60Hz panel. 51.3% have 8GB of RAM in their system, while 33.7% reported using 16GB - as for DDR3, it's used by 87.8%, while just 9% are using DDR4.