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The Samsung CHG70 is a very good VA-type LCD monitor with better picture quality than average. It has a high contrast ratio as well as support for both HDR and wider color gamuts. It’s especially great for gaming thanks to its high refresh rate of 144 Hz, low input lag, and FreeSync support. While it is quite versatile and sports a decently flexible stand, its narrow viewing angle makes it less suitable for environments where sharing with neighbors is commonplace. The CHG70 is available in two sizes: the 27" size (Samsung C27HG70) and the 32" size (Samsung C32HG70); we’ve reviewed the 27" model.
Motion looks excellent on the Samsung CHG70. This monitor’s got it all: a flicker-free backlight, fast response time, high native refresh rate, AMD FreeSync 2 variable refresh rate technology, and optional Black Frame Insertion modes. While many monitors have a faster response time, very few can beat the CHG70’s complete package.
80% Response Time
: 4.5 ms
100% Response Time
: 11.3 ms
Refresh Rate
Native
: 144 Hz
Factory Overclock
: N/A
Variable Refresh Rate
: FreeSync
VRR Maximum
: 144 Hz
VRR Minimum
: < 20 Hz
VRR Maximum With OC
: N/A
VRR Supported Connectors : DisplayPort, HDMI
Over HDMI the maximum refresh rate without FreeSync is 144 Hz, but with FreeSync it unfortunately drops to 100 Hz. Luckily FreeSync over HDMI on this monitor also supports LFC, extending its range below 20 Hz.
The monitor’s OSD lists two FreeSync modes: ‘Standard Engine’ and ‘Ultimate Engine’. The ‘Ultimate Engine’ had the widest FreeSync range and no adverse effects, so we only recommend the ‘Standard Engine’ if your game has problems with the ‘Ultimate Engine’.
Input Lag
Native Resolution
: 4.4 ms
Non-Native Resolution
: N/A
Native Resolution @ 60 Hz
: 9.3 ms
Variable Refresh Rate
: 4.2 ms
HDR
: 4.3 ms
Black Frame Insertion (BFI)
: 6.4 ms
BFI frequency tested: 144 Hz
Excellent low input lag. The input lag remains low when the monitor is in FreeSync or HDR mode, which is good. Unfortunately, the 60 Hz input lag is oddly high and strangely inconsistent, varying from ~44 to ~40 on a single test run. Also no non-native resolutions supported the monitor’s native 144 Hz refresh rate and so will have higher input lag, which is not great.
Update 12/11/2017: When the monitor’s ‘Game -> Refresh Rate’ setting is set to 60 Hz, the ‘Low Input Lag’ setting is no longer greyed out and the 60 Hz input lag becomes consistently low. The test result has been updated. When using the monitor at 60 Hz without FreeSync, such as when using an Xbox One X, we recommend setting ‘Game -> Refresh Rate’ to 60 Hz and ‘Low Input Lag’ to ‘On’.