When comparing Dell P2815Q vs Monoprice CrystalPro 27" IPS, the Slant community recommends Monoprice CrystalPro 27" IPS for most people. In the question“What are the best 27+ inch monitors?” Monoprice CrystalPro 27" IPS is ranked 3rd while Dell P2815Q is ranked 7th. The most important reason people chose Monoprice CrystalPro 27" IPS is:
Good image quality due to IPS (In-Plane Switching) LED backlit panel made by LG in Korea with 6ms (grey-to-grey) response time, 60Hz refresh rate and standard 1000:1 contrast ratio and 8-bit colors. This is the same LG IPS panel used in Apple displays, but sold at a fraction of what Apple charges.
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Pros
Pro Good image quality
Vibrant, sharp & good overall color responsiveness with 1.073 billion colors and a 5ms response time.
Pro Full swivel stand
You can turn it fully to a horizontal or vertical position.
Pro Good selection of connectors
Dell P2815Q has HDMI 1.4, Thunderbolt, 2 DisplayPorts (1 in, 1 out) and 4 USB 3.0 ports. HDMI 1.4 & Thunderbolt are capable of 4K @ 30Hz.
Pro VESA mount
So you can mount it to a desk stand or a wall.
Pro Good image quality
Good image quality due to IPS (In-Plane Switching) LED backlit panel made by LG in Korea with 6ms (grey-to-grey) response time, 60Hz refresh rate and standard 1000:1 contrast ratio and 8-bit colors. This is the same LG IPS panel used in Apple displays, but sold at a fraction of what Apple charges.
Pro Great value for money
With Monoprice CrystalPro listed as $390 with image quality the same as Apple Cinema Displays and excellent support this is a good choice if you are OK with not having additional bells and whistles.
Pro 1 year warranty
Monoprice has a full 1 year warranty. Additionally, they promise less than 5 dead pixels. If you can find 5 dead pixels, they will send you a replacement.
Pro Audio I/O
Monoprice CrystalPro has 1x 3.5mm TRS stereo input and 1x 3.5mm TRS stereo output.
Cons
Con Bad viewing angles
Since it's a TN monitor, it has worse viewing angles compared to IPS displays.
Con Bad refresh rate
At 3840 x 2160 it's max 30Hz and at 1920 x 1080 it's max 60Hz.
Con Frail stand
The stand is somewhat poor.
Con DVI only
Monoprice CrystalPro lacks USB, Ethernet, HDMI and Thunderbolt connectors. A higher priced version with more inputs is promised at a later date.
Con Unavailable
This model has been discontinued, and is no longer available anywhere on Amazon.
Con Weak built-in speakers
Sound quality of the built in speakers is quite poor.
