The Alienware AW2720HF says it all right in the name with the “HF” to indicate high-frequency, as in the high refresh rate (at least that’s what we think the HF stands for). It’s a 27-inch IPS panel with a blazing-fast 240Hz refresh rate, 1ms response time and compatibility with both FreeSync and G-Sync.
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https://www.techradar.com/reviews/alienware-aw2720hf