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Compare Cooler Master GM27-CF vs Cooler Master GM34-CW vs HP M34d

Connectivity

Ports
1x DisplayPort 1.2, 1x 3.5 mm Audio Out, 1x HDMI 1.4, 1x HDMI 2.0
2x DisplayPort 1.4, 1x 3.5 mm Audio Out, 1x HDMI 1.4, 1x HDMI 2.0
1x USB 3.2 (Type-C; Gen 1; upstream; 65W), 1x HDMI 2.0, 1x 3.5 mm Audio Out, 1x DisplayPort 1.2, 1x USB 3.0 (Type-B; upstream), 4x USB 3.2 (Type-A; Gen 1; downstream)

Construction

Adjustment | Height
110 mm / 4.3307 in
100 mm / 3.937 in
100 mm / 3.937 in
Adjustment | Pivot
N/A
N/A
N/A
Adjustment | Swivel
-15° ~ 15°
-45° ~ 45°
N/A
Adjustment | Tilt
-5° ~ 15°
-5° ~ 15°
-5° ~ 21°
Camera
No
No
No
Colors
Black
Black
Black
Form Factor
Curved monitor
Curved monitor
Curved monitor
Speakers
2x 3W
2x 3W
2x 3W
VESA Mount
75 x 75 mm
75 x 75 mm
100 x 100 mm

Dimensions

Bezels
89.59% screen-to-body ratio
Size | Depth
9.39 in / 238.5 mm w/ stand
10.39 in / 263.9 mm w/ stand
4.41 in / 112.1 mm w/o stand, 9.25 in / 234.9 mm w/ stand
Size | Height
20.79 in / 528 mm w/ stand
20.5 in / 520.82 mm w/ stand
14.44 in / 366.9 mm w/o stand, 16.46 in / 418 mm w/ stand
Size | Width
24.26 in / 616.2 mm
31.84 in / 808.65 mm
31.87 in / 809.4 mm
Weight
5.13 kg / 11 lbs w/ stand
7.02 kg / 15 lbs w/ stand
7.85 kg / 17 lbs w/o stand , 10.5 kg / 23 lbs w/ stand

Display

Aspect Ratio
16:9
21:9
21:9
Brightness
300 nits
400 nits
250 nits / 300 nits (peak)
Contrast Ratio
3000:1 (static)
3000:1 (static)
3500:1 (static), 10000000:1 (dynamic)
Display Backlight
W-LED
W-LED
W-LED
Display Color Depth
8 bits, 16777216 colors
8 bits, 16777216 colors
8 bits, 16777216 colors
Display Curvature
1500R
1500R
1500R
Display Diagonal
27" (27 in / 685.8 mm)
34" (34 in / 863.6 mm)
34" (34 in / 863.6 mm)
Display Type
VA, Anti-glare/Matte
VA, Anti-glare/Matte, Samsung
VA, Anti-glare/Matte (3H)
Gamut
90% DCI-P3, 125% sRGB
95% DCI-P3, 125% sRGB
Pixel Density
81 ppi
109 ppi
109 ppi
Pixel Pitch
0.311 mm
0.232 mm
0.232 mm
Refresh Rate
48 Hz ~ 165 Hz
48 Hz ~ 144 Hz
48 Hz ~ 100 Hz
Resolution
FHD (1920x1080)
UW-QHD (3440x1440)
UW-QHD (3440x1440)
Response Time
3 ms (min)
4 ms (min)
5 ms (min)
Viewing Angle
178° H / 178° V
178° H / 178° V
178° H / 178° V

Function

HDR
DisplayHDR 400
Licenses
RoHS
RoHS
BIS, CB, CCC, CE, CEL, cTUVus, EAC, Energy Star, EPA, EPEAT, FCC, GS Mark, ISO 9241-307, KC/KCC, NOM, RCM, TCO Certified, TÜV Rheinland Low Blue Light Certified, VCII, WEEE
Operating Humidity
10 % ~ 85 %
10 % ~ 85 %
20 % ~ 80 %
Operating Temperature
0 °C ~ 40 °C , 32 °F ~ 104 °F
0 °C ~ 40 °C , 32 °F ~ 104 °F
5 °C ~ 35 °C , 41 °F ~ 95 °F
Variable Framerate
AMD FreeSync
AMD FreeSync
Video
Flicker-free technology, Low Blue Light, Wide Color Gamut, DCR (Dynamic Contrast Ratio)
Flicker-free technology, Low Blue Light, Picture-in-Picture, Wide Color Gamut, Picture-by-Picture, DCR (Dynamic Contrast Ratio)
KVM Switch, Low Blue Light, 3-sided Micro-Edge design, Flicker-free technology

Performance

Energy Efficiency
G
Power Consumption
34 W (average) / 48 W (max) / 0.5 W (sleep)
54 W (average) / 80 W (max) / 0.5 W (sleep)
48 W (average) / 190 W (max) / 0.3 W (sleep)

Production

Accessory
HDMI 2.0 cable
DisplayPort 1.4 cable
DisplayPort cable, HDMI cable, USB Type-C cable
Debut
2020
2020
2021

Reviews

Neofiliac score
66%
79%
41%
Pros
  • 1500R curvature
  • Rich color reproduction
  • Stand with tilt, swivel, and height adjustments
  • High 3000:1 contrast ratio
  • Build-in speakers included
  • 165 Hz refresh rate
  • DisplayHDR 400
  • Ultra-wide form factor
  • 1500R curvature
  • Rich color reproduction
  • Stand with tilt, swivel, and height adjustments
  • High 3000:1 contrast ratio
  • Build-in speakers included
  • Ultra-wide form factor
  • 1500 curvature
  • Stand with tilt and height adjustments
  • High 3500:1 contrast ratio
  • Build-in speakers included
Cons
  • No publicized HDR support
  • 8-bit display panel
  • 8-bit display panel
  • No publicized HDR support
  • 8-bit display panel
  • Display panel not very bright

Price

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