TL;DR: Seems like I hadn't updated the solution on this thread. In my case, it was a defective monitor which was replaced by Dell. The overall experience of getting it replaced was a nightmare initially due to Dell rejecting the replacement, once a replacement was approved it took about a month and a half to get a replacement due to stock shortages. Throughout the process staff at Dell were generally very friendly and helpful. The community team were very efficient in reaching out to me and keeping me up to date. I believe my issue was an edge case and it simply came down to a defect in the monitor itself. This isn't widespread and I haven't come across others reporting the same issue. The room for improvement for Dell Tech Support/ Customer Service would be to validate the customer's issues and get back to them about any approval outcome ASAP. I had to do way too much chasing for a £700 monitor!
I noticed though is that there are some interesting color artifacting in games when enabling the ‘Adaptive Sync Compatible’ option in the Radeon display drivers when using the DP (DisplayPort). I have an AMD Radeon XFX 6800 XT card. Upon troubleshooting I’ve been able to replicate the issue consistently in games and especially 3DMark. Videos for the tests below along with my system specs: My System: Monitor Alienware AW2721D - Firmware: M0B101 Radeon Software version: 21.3.1 (10/Mar/21) PC Specs: Ryzen 9 5900X, 16GB RAM, TMSI Tomahawk x570 motherboard Video of Test Performed using both HDMI and DisplayPort: DisplayPort (issue): [URL] HDMI (no issue): [URL]
AW2721D, enabling AMD Adaptive Sync Compatible, causes flashing colors