BenQ X3100i review
A 4LED light source, very low response time, and nothing to replace.
Quick answer
The BenQ X3100i is a true 4K gaming projector with a 4LED light source, roughly 3,300 ANSI lumens and a 4.2ms response time. The 4.2ms figure is the specification that justifies it over a cheaper lamp model, and the 4LED source means there is no lamp to replace.
A true 4K gaming projector with a 4LED light source, roughly 3,300 ANSI lumens and a 4.2ms response time.
Check price on AmazonSpecifications
| Spec | Detail |
|---|---|
| Light source | 4LED |
| Resolution | True 4K |
| Brightness | Approximately 3,300 ANSI lumens |
| Response time | 4.2ms |
| Intended use | Gaming first |
The table above lists the X3100i's core specifications, and the defining one is a 4.2ms response time from a 4LED light source rated at roughly 3,300 ANSI lumens.
Specifications above come from BenQ's published specifications. Treat pricing as approximate, since Amazon pricing moves.
What it does well
- A 4LED light source with no lamp to replace, which removes the main running cost and the gradual dimming that comes with it.
- 4.2ms response time, low enough that competitive play on a large screen is genuinely practical.
- Around 3,300 ANSI lumens, bright enough for a room with the lights on, which is how most people game.
- LED light sources deliver good colour saturation and start instantly, with no warm-up.
Where it falls short
- It costs meaningfully more than the TK700, and the picture difference for casual use is smaller than the price gap.
- LED brightness figures are not directly comparable to lamp projectors, so cross-shopping on lumens alone misleads.
- Black levels remain behind cinema-focused projectors, as with any gaming-oriented model.
- Placement flexibility is limited compared with the enthusiast home cinema projectors.
What owners report
Owners who game frequently describe the LED light source as the reason they chose it over cheaper rivals, and the specific benefit reported is behavioural: instant on and off means the projector gets used for a thirty minute session rather than only for planned evenings. Whether that light source pays back the price gap over a lamp model depends on how many hours you run it, which our lamp versus laser running cost calculator works out over five years.
Response time is praised consistently, with owners reporting no perceptible penalty against a monitor for most genres. The most common criticism is price relative to the TK700, particularly from owners who game casually. The X3100i also appears in our best gaming projectors roundup and our best home theater projector guide, and the BenQ X3100i vs Optoma UHD38x comparison sets it against the obvious rival.
Who it suits
- Regular gamers who want a projector as a permanent fixture rather than an experiment.
- Anyone who resents lamp replacement as a running cost.
- Players who game in rooms with ambient light.
Who should skip it
- Casual gamers, for whom the TK700 is most of the experience for less.
- Film-first viewers, who should buy a cinema-oriented projector.
- Dark room enthusiasts prioritising black level.
Alternatives worth considering
Considerably less money with similarly low input lag, at the cost of a lamp you will eventually replace and slightly less brightness. The right first gaming projector.
Check price on AmazonBetter colour accuracy and black level for watching films, with higher input lag. If your screen time is mostly cinema with occasional gaming, this is the better balance.
Check price on AmazonCommon questions
What is a 4LED light source and why does it matter?
It uses LEDs rather than a lamp or laser to produce light. Practically, that means nothing to replace, instant on and off with no warm-up or cool-down, and good colour saturation. The trade is that LED brightness figures do not compare directly with lamp projectors, so cross-shopping on lumens alone will mislead you.
BenQ X3100i or TK700?
How much you will use it decides. If a gaming projector is going to be a permanent part of the room, the X3100i's LED light source removes the lamp cost and gets used more because it starts instantly. If you are testing whether projector gaming suits you, the TK700 gives most of the experience for less.
Is 4.2ms response time actually noticeable?
Against a gaming monitor, most players report no meaningful difference for the majority of genres. Against a cinema projector with high input lag, the difference is obvious immediately. This is the specification that makes projector gaming viable at all.
Can I watch films on it too?
Yes, and it is perfectly enjoyable. It simply is not optimised for it, so black levels and colour refinement are behind a cinema-focused projector at similar money. If films are the majority of your viewing, buy accordingly.
Keep reading
This review draws on published specifications, manufacturer figures and the consensus of verified owner reviews. We have not tested this product ourselves, and we say so rather than implying otherwise. As an Amazon Associate we earn from qualifying purchases.