Overview
The LG UltraGear 27GP850-B is a 27-inch 1440p gaming monitor built on LG's Nano IPS panel technology. It launched in April 2021 as the successor to the widely recommended 27GL850, and it has stayed a default value recommendation in the 1440p IPS category ever since.
We are covering a monitor for the peripherals category deliberately. Of everything you plug into a PC, the display is the component you actually look at for every hour of use, and it is the one people most often underspend on after building an otherwise strong system.
This page is a curated summary. CoreForge did not lab-test this monitor. We verify the specifications against LG's official Canadian product page, summarize independent reviewer findings, and add the Canadian availability perspective. The full sources are linked below.
Verified specifications
According to LG Canada's official product page, the 27GP850-B is a 27-inch QHD (2560x1440) Nano IPS display rated at 1ms GtG, running 165Hz natively with a 180Hz overclock. It carries VESA DisplayHDR 400 certification, ships colour calibrated, and is both NVIDIA G-SYNC Compatible and AMD FreeSync Premium certified.
LG's detailed specifications list 98% DCI-P3 colour gamut coverage (CIE1976) and 400 cd/m2 typical brightness, with a stand offering tilt, height and pivot adjustment.
What the reviews found
TechSpot tested this monitor against its predecessor and identified the meaningful upgrades over the 27GL850: the higher refresh rate with the 180Hz overclock, alongside the same Nano IPS fundamentals and 98% DCI-P3 coverage.
One genuinely useful finding from their testing concerns overdrive. TechSpot measured the Fast and Normal overdrive modes and found the crossover point sits around 100Hz: Fast is the better setting if you mostly play at high refresh rates, while Normal produces cleaner results with almost no overshoot at lower refresh rates. They noted LG did not implement variable overdrive here, so the monitor cannot switch automatically. Practically, that means you should set overdrive once based on the refresh rate you actually play at, rather than leaving it at whatever the default is.
Honest notes on HDR and contrast
Two things worth being direct about.
DisplayHDR 400 is the entry rung of the VESA HDR ladder. It certifies a brightness floor, but it does not deliver the local dimming or peak brightness that makes HDR content look genuinely different. Treat this as an SDR monitor that accepts an HDR signal.
Second, this is an IPS panel, and IPS panels in this class trade contrast for colour accuracy and viewing angles. Dark scenes will not have the depth you would get from a VA or OLED display. That is a characteristic of the technology, not a defect, but it is the main reason someone might choose differently.
Pairing notes
1440p at high refresh is exactly the workload an RTX 5070-class card is built for, which is why we positioned that GPU as a 1440p card in its own review. A 165Hz to 180Hz panel gives you room to grow into rather than frames you cannot use.
Use DisplayPort rather than HDMI to get the full rated refresh rate and adaptive sync working properly. This trips up a lot of first-time builders who plug in whatever cable is closest.
The Canadian angle, and an availability caveat
Here is where we have to be straight with you. We could not verify a reliable current Canadian retail price for this model at the time of writing, so we are not publishing one.
More importantly, availability has become uneven. LG Canada maintains an official product page for the 27GP850-B, and it appears at Amazon.ca and Newegg.ca, but at least one Canadian retailer currently lists it out of stock, and some Amazon.ca listings are third-party sellers with limited quantities rather than Amazon direct.
That is normal for a panel five years into its life. LG's own newer UltraGear models now cover overlapping territory at 1440p, including higher-refresh options. Before you commit, compare this panel against the current LG lineup and against competing Fast IPS panels on price and warranty, not just on reputation.
Check the live price and stock on Amazon.ca, Newegg.ca, Best Buy Canada, Canada Computers and Memory Express. If the 27GP850-B is priced near a newer equivalent, buy the newer one.
Bottom line
A genuinely good 1440p panel with verified specs and a long track record, and the right resolution and refresh target for a mid-range gaming build. Just buy it with your eyes open about its age, confirm Canadian stock and price, and compare it against LG's current models before ordering.