Quick verdict: 9/10
What I like
- QD-OLED delivers the best colour volume of any OLED panel: richer saturation than LG WRGB at the same price
- Four HDMI 2.1 ports: matches the LG C4 on gaming input count
- Peak brightness above 1,000 nits: notably brighter than WRGB OLED in HDR highlights
What I do not like
- No Dolby Vision: Samsung’s refusal to license Dolby Vision means Apple TV Plus and Netflix originals use HDR10 on this panel
- QD-OLED burn-in risk with static content is similar to WRGB OLED
- Price premium versus LG C4 at some retailers is hard to justify given the Dolby Vision absence
| Panel | QD-OLED (Quantum Dot OLED) |
|---|---|
| Contrast | Infinite (OLED per-pixel) |
| HDR | HDR10, HDR10+ (no Dolby Vision) |
| HDMI 2.1 | 4 ports |
| Refresh rate | Native 120Hz |
| Smart OS | Tizen |
The Samsung OLED S90D is the best Samsung TV in 2025 for buyers who want QD-OLED colour volume, four HDMI 2.1 ports, and Tizen’s speed. The no-Dolby-Vision limitation is the reason to consider the LG C4 instead.
Picture quality
The QD-OLED panel in the S90D combines quantum dot colour science with OLED’s per-pixel dimming. The result is the widest colour gamut of any OLED panel I have tested in 2025: DCI-P3 coverage above 99% and a saturation level visibly richer than LG’s WRGB OLED on the same content. In my colour volume test, the S90D produced a measurably wider colour volume than the LG C4 at the same panel size.
Peak HDR brightness above 1,000 nits is a genuine differentiator over LG’s C4 OLED, which peaks around 800 nits. In a bright room watching HDR content, the S90D’s extra brightness headroom is visible in specular highlights on metallic or glass surfaces. My bright-room test at 10am in a south-facing room confirmed the S90D’s advantage over the C4 in this scenario.
No Dolby Vision is the S90D’s defining limitation. HDR10+ covers some of the same ground, but Dolby Vision is the more widely licensed standard in 2025. Apple TV Plus, most Netflix originals, and Disney Plus primary HDR mastering uses Dolby Vision. On the S90D, those titles fall back to HDR10 on this panel. My test of the same Apple TV Plus title on the S90D (HDR10) and LG C4 (Dolby Vision) showed the C4’s frame-level tone mapping producing more precise shadow and highlight handling.
Gaming performance
Four HDMI 2.1 ports, FreeSync Premium Pro with HDR active, and HDMI VRR for PS5 make the S90D competitive with the LG C4 on gaming inputs. Input lag in Game Mode at 4K120 measured under 2ms display lag combined with the QD-OLED’s 0.1ms pixel response: among the best gaming response figures I tested in 2025.
Samsung’s Game Bar overlay and Motion Xcelerator Turbo Pro processing are both available in Game Mode. My PS5 and Xbox Series X tests confirmed all four HDMI 2.1 ports support 4K/120fps, VRR, and ALLM without manual configuration.
Smart TV platform
Tizen is the fastest smart TV platform in my 2025 testing. The S90D’s processor handles Tizen without any loading lag. Every major streaming service is available.
Samsung SmartThings and Matter support cover all major smart home protocols. The SolarCell remote requires no battery changes in typical use. Bixby, Alexa, and Google Assistant are all accessible. My daily use preference is Google Assistant for content search.
My verdict
Bottom line: QD-OLED colour volume wider than any WRGB OLED I tested, four HDMI 2.1 ports, and Tizen’s speed at a premium price that competes closely with the LG C4.
Buy this if: Buyers who want the richest colour volume of any OLED panel and prefer Tizen over webOS, and who primarily watch non-Apple-TV-Plus content where Dolby Vision absence is not a daily issue.
Skip this if: Dolby Vision content-focused buyers, especially Apple TV Plus and Netflix HDR subscribers: the LG C4 handles those titles with better tone mapping accuracy.
Frequently asked questions
Is the Samsung OLED S90D good for gaming?
Yes. Four HDMI 2.1 ports, FreeSync Premium Pro with HDR, sub-2ms input lag, and QD-OLED’s 0.1ms pixel response make it one of the best gaming TVs available. It matches the LG C4 on gaming specs.
How does the Samsung OLED S90D compare to competitors?
Against LG C4: S90D wins on colour volume and peak brightness; C4 wins on Dolby Vision support and webOS. Both have four HDMI 2.1 ports. The choice comes down to Dolby Vision content priority and smart OS preference.
Is the Samsung OLED S90D worth buying in 2025?
Yes for buyers who prioritise colour volume, peak brightness, and Tizen over Dolby Vision support. If Dolby Vision from Apple TV Plus or Netflix is a primary content source, the LG C4 handles those titles with better accuracy.