The LG UltraGear 27G810A-B is $334.99 on Amazon at the time of writing, and that figure is reserved for Prime members. Shoppers without Prime pay $349.99 for the same monitor from the same seller.
Amazon's buy box shows only the lower number by default. The $349.99 open price sits in a collapsed row labelled Regular Price, and the page states that the deal is exclusively for Amazon Prime members.
The panel itself is the reason to look past that $15 gap. This 27-inch screen runs 4K at 180Hz, or drops to 1080p and runs at 360Hz.
What Dual Mode actually does on the 27G810A-B
LG calls the feature Dual Mode, and it is a real panel behaviour rather than a resolution dropdown. The monitor holds 3840 by 2160 at 180Hz in one mode, and 1920 by 1080 at 360Hz in the other.
Switching happens on the monitor. LG's spec pages say the mode is chosen in the on-screen display, with an optional hotkey or keyboard shortcut through the company's Switch software.
That distinction matters, because the faster mode does not depend on installing anything. LG also lists Dual-Mode here as a VESA certified feature.
What LG does not say is how the 1080p picture is drawn. A 1920 by 1080 image divides exactly into a 3840 by 2160 panel, so clean two-by-two pixel mapping is geometrically possible.
However, LG publishes no scaling method for this model on its US product page or in any other region. Buyers expecting the sharpness of a native 1080p screen have nothing from LG confirming it.
LG UltraGear 27G810A-B specifications
| Specification | LG UltraGear 27G810A-B |
|---|---|
| Panel | 27-inch IPS, 16:9 |
| Dual Mode | 3840 x 2160 at 180Hz, or 1920 x 1080 at 360Hz |
| Response time | 1ms GtG, measured at the Faster setting |
| Brightness | 400 cd/m2 typical, 320 cd/m2 minimum |
| Contrast | 1000:1 typical |
| Colour | DCI-P3 95 percent typical, 1.07 billion colours |
| HDR | HDR10, VESA DisplayHDR 400 |
| Ports | 2x HDMI 2.1, 1x DisplayPort 1.4 with DSC, USB 3.0 hub |
| Stand | 130mm height, tilt, swivel, pivot, 100 x 100mm VESA |
LG rates the 1ms response at its Faster overdrive setting, which the Amazon listing does not mention. Brightness, contrast and viewing angles are missing from that listing as well.
The listing names HDMI 2.1 but omits the DisplayPort version. LG's spec sheets put DSC on the DisplayPort 1.4 input, and do not state which connection is needed for the full 180Hz.
The $599.99 list price does most of the discount work
Amazon anchors the deal against a $599.99 list price, shown as a struck-through figure on the page. That anchor produces the 42 percent badge, which flatters the size of the cut.
The monitor has been reported selling at or around $349.99 at major US retailers since late 2025. Measured against that, $334.99 is a modest move rather than a collapse in price.
LG's own US page for the model shows no price at all, offering only Add to Cart and Find a Retailer. Whether LG undercuts Amazon directly cannot be checked.
Amazon.com holds the buy box in both the Prime row and the open-price row, so no marketplace seller is involved. Stock showed only five units at the time of writing.
How it compares with other dual-mode 4K monitors
| Monitor | Dual Mode | Price | Buy box |
|---|---|---|---|
| LG UltraGear 27G810A-B | 4K 180Hz / FHD 360Hz | $334.99 with Prime, $349.99 without | Amazon.com |
| Samsung Odyssey G7 (G70F) | 4K 180Hz / FHD 360Hz | $382.60 | Amazon.com |
| KTC H27P6 | 4K 160Hz / FHD 320Hz | $309.99 | KTC-Official |
| KOORUI G2741L | 4K 160Hz / FHD 320Hz | $279.99 | AetherDisplay |
The Samsung Odyssey G7 (G70F) matches the LG mode for mode, with 180Hz in 4K and 360Hz in Full HD. It costs $382.60 and claims only HDR10, with no DisplayHDR tier.
The cheaper alternatives are slower in both modes. The KTC H27P6 at $309.99 and the KOORUI G2741L at $279.99 both top out at 160Hz in 4K and 320Hz in Full HD.
Both of those are also sold by marketplace sellers, KTC-Official and AetherDisplay, rather than by Amazon. Digital Citizen covered the KTC H27P6 at $260.09 in September, so its current price is well above that point.
Dual-mode panels have spread quickly through the budget end of the market, as AOC's 4K and 310Hz model showed earlier in the year. The LG is the fastest of this group in both of its modes.
What LG and Amazon leave unpublished
LG certifies the monitor for both FreeSync Premium and G-Sync compatibility, which is standard at this price. Shoppers after an OLED instead can look at the pricier LG UltraGear 27GX790B-B.
Several things remain unstated. LG does not publish sRGB coverage, a per-input refresh ceiling, or any test method behind the 1ms rating beyond naming the Faster setting.
Its UK page also carries a stray 185Hz heading that contradicts the 180Hz given in LG's own spec sheet. The lower figure is the one the spec tables use.
No end date is attached to the Prime price, and no independent measurement of this model code appears to exist. Prices were checked on October 8, 2026, and can change without notice.
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