Comparison · Monitors
LG 39GX950B vs Alienware AW3926QW: which 39-inch 5K2K OLED to buy
Both are 39-inch 5K2K tandem OLED ultrawides at 165Hz with a 330Hz mode. The Alienware is $700 cheaper and has an RGB-stripe panel; the LG has DisplayPort 2.1 UHBR20 and 90W USB-C.
Our pick: Alienware AW3926QW for most people; LG 39GX950B if you need DisplayPort 2.1 UHBR20 and 90W USB-C
Alienware
AW3926QW
8.8$1,099.99
Tom's Guide's Editor's Choice: an RGB-stripe 5K2K OLED for $700 less than LG's.
Pros
- • RGB-stripe tandem OLED
- • $1,099.99
- • Dell 3-year burn-in coverage
Cons
- • Measured 243 nits SDR (Tom's Guide)
- • Very large for many desks
LG
UltraGear evo GX9 (39GX950B)
8.5$1,799.99 list (~$1,577)
The pricier option with DisplayPort 2.1 UHBR20, 90W USB-C, and AI upscaling.
Pros
- • DP 2.1 UHBR20, HDMI 2.1, 90W USB-C
- • DisplayHDR True Black 500
- • AI upscaling
Cons
- • $700 more at list
- • Two-year burn-in warranty
2026 introduced the 39-inch 5K2K OLED ultrawide. LG's UltraGear evo GX9 (39GX950B) arrived first at $1,799.99; Dell's Alienware AW3926QW followed at $1,099.99 with an RGB-stripe panel. Specs come from LG's US announcement, TechSpot, PCWorld, and Tom's Guide's review of the Alienware. We have not tested either.
Specs compared
| Spec | LG 39GX950B | Alienware AW3926QW |
|---|---|---|
| Panel | 39-inch Primary RGB Tandem OLED (4th gen) | 39-inch RGB-stripe tandem OLED |
| Resolution and refresh | 5120 x 2160 at 165Hz; 2560 x 1080 at 330Hz | 5120 x 2160 at 165Hz; 2560 x 1080 at 330Hz |
| Curve | 1500R | 1500R |
| Brightness | 335 nits typical (LG rating) | 243 nits SDR measured (Tom's Guide) |
| HDR | DisplayHDR True Black 500 | Not stated |
| Inputs | DP 2.1 (UHBR20), HDMI 2.1, USB-C 90W | DP, 2 x HDMI 2.1, 2 x USB-C |
| Burn-in warranty | 2 years (LG) | 3 years (Dell) |
| Price | $1,799.99 list (~$1,577) | $1,099.99 |
Panel and text
Both use tandem OLED stacks. Dell's is an RGB stripe, which renders text like an LCD; LG's uses a white subpixel, which helps brightness but can fringe small text. LG's 335-nit rating and Tom's Guide's 243-nit measurement of the Dell are not a like-for-like comparison, so treat brightness as close until both are measured the same way.
Ports
LG lists DisplayPort 2.1 at UHBR20, which carries 5K2K at 165Hz with the most headroom, plus 90W USB-C for a laptop. Dell's has two HDMI 2.1 ports and two USB-C ports; Tom's Guide did not list their charging wattage.
Verdict
The Alienware is the better buy for most people: $700 cheaper, an RGB-stripe panel, and a longer burn-in warranty. Choose the LG if one-cable laptop charging at 90W or DisplayPort 2.1 UHBR20 matters to you.
Questions we get
What is 5K2K?
A 21:9 ultrawide resolution of 5120 x 2160, the width of 5K and the height of 4K. On a 39-inch screen it gives about 140 pixels per inch, sharp enough for comfortable text without scaling tricks.
Which 39-inch OLED is better, LG or Alienware?
For most buyers the Alienware: it costs $1,099.99 against $1,799.99, uses an RGB-stripe panel for cleaner text, and Dell covers burn-in for three years. Pick the LG for its DisplayPort 2.1 UHBR20 input and 90W USB-C.