Encoder Boards Explained: Brook UFB vs. I-PAC vs. Zero Delay
Your encoder board is the bridge between your controls and your games. Choosing the wrong one means input lag, compatibility headaches, or wasted money.
TL;DR — The Quick Version
Zero Delay USB encoders ($8–$15) work for basic retro gaming but lack advanced features. The I-PAC ($40–$80) is the gold standard for MAME cabinets with keyboard emulation and shift functions. The Brook UFB ($80–$120) is the premium choice for fighting games and multi-console support with 1ms polling rate. Choose based on your primary use case: MAME retro → I-PAC, fighting games → Brook UFB, tight budget → Zero Delay.
The Invisible Heart of Your Arcade Cabinet
Your encoder board is the component that translates physical button presses and joystick movements into digital signals your PC can understand. It's the bridge between the analog world of arcade controls and the digital world of emulation.
Choose the right encoder, and your controls feel responsive, accurate, and reliable. Choose the wrong one, and you'll deal with input lag, dropped inputs, and compatibility nightmares.
Here are the three most common options, compared honestly.
Zero Delay USB Encoder
What it is: A basic USB encoder board, usually manufactured in China, available for $8–$15 on Amazon or AliExpress. It's the entry-level option that ships with most cheap arcade kits.
Polling Rate: ~1ms (1000Hz), despite the "zero delay" marketing name
| Pros | Cons |
|---|---|
| Extremely cheap ($8–$15) | Build quality varies wildly |
| Plug and play, no drivers needed | No analog stick support |
| Works with most basic setups | Limited to one player per board |
| Widely available | No SOCD cleaning |
| Good enough for casual retro gaming | No firmware updates |
Best for: Budget builds, casual retro gaming (NES through PS1 era), first-time builders who want to test the waters.
My honest take: The zero delay board gets a bad reputation, and some of it is deserved. But for a basic two-player retro cabinet, it works fine. The key is managing expectations, this is a $10 component, and it performs like one. Don't expect fighting game tournament performance.
Want to see a zero delay encoder in action before you buy one? This hands-on review by Retro Man Cave unboxes the board, walks through the wiring, and playtests it in MAME. The verdict: for basic retro gaming, it performs surprisingly well for the price. But the short cables and tight connectors are real drawbacks to plan for.
Zero Delay USB Arcade Encoder | Review & Playtest
I-PAC (Interface for PC to Arcade Controls)
What it is: A purpose-built arcade encoder manufactured by Ultimarc in the UK. It's been the standard in the arcade building community for over 20 years. Available in 2-player and 4-player versions.
Polling Rate: ~5ms (200Hz), configurable
| Pros | Cons |
|---|---|
| Rock-solid reliability | More expensive ($40–$80) |
| Keyboard emulation, works with everything | Lower polling rate than Brook UFB |
| Supports up to 4 players (I-PAC 4) | No native console support |
| Configurable key mapping via software | Requires some configuration |
| 20+ years of community support | No analog stick support on base model |
| Shift function for extra inputs | Older design philosophy |
Best for: Multi-player cabinets, MAME-focused builds, builders who want reliability and community support, setups that need many simultaneous inputs.
My honest take: The I-PAC is the Toyota Camry of encoder boards. It's not flashy, it's not the newest, but it's reliable, well-supported, and it just works. For a MAME cabinet where you need lots of buttons and multiple players, it's hard to beat. The keyboard emulation means it works with virtually every emulator without special configuration.
This guide from Arcade-One shows the real-world process of wiring an arcade cabinet, including a direct comparison between a cheap USB encoder and the I-PAC. You can see exactly why the I-PAC's build quality and wiring design make it the preferred choice for serious multi-player MAME setups.
Wiring & Hardware Guide (Cheap USB Encoder to I-PAC)
by Arcade-One
Brook UFB (Universal Fighting Board)
What it is: A premium encoder board designed by Brook, originally for the fighting game community. It supports PC, PS3, PS4, PS5, Xbox 360, Xbox One, Xbox Series X, and Nintendo Switch natively.
Polling Rate: ~1ms (1000Hz)
| Pros | Cons |
|---|---|
| Multi-console support out of the box | Most expensive ($80–$120) |
| 1ms polling rate, tournament grade | Designed for fighting games, not MAME |
| SOCD cleaning built in | Single player per board |
| Firmware updates via USB | Overkill for casual retro gaming |
| Touchpad button for PS4/PS5 | Requires headers for some connections |
| Active development and support |
Best for: Fighting game enthusiasts, builds that connect to consoles, builders who want the lowest possible input latency, premium builds where performance matters.
My honest take: The Brook UFB is what I use in every G&G Arcade premium build. The multi-console support means your cabinet isn't locked to PC-only use, and the 1ms polling rate makes fighting games feel incredible. Yes, it's expensive. Yes, it's overkill for playing Pac-Man. But if you're building a premium cabinet that needs to handle everything from retro classics to modern fighting games, this is the board.
The Brook UFB Fusion is the latest evolution of the board I use in every premium G&G Arcade build. This review walks through the multi-console support, the 1ms polling rate, and the features that make it the gold standard for fighting game and premium arcade setups. If you're considering the investment, this is the video to watch.
Brook UFB Fusion PS5 Review: Features & Setup
Quick Comparison
| Feature | Zero Delay | I-PAC | Brook UFB |
|---|---|---|---|
| Price | $8–$15 | $40–$80 | $80–$120 |
| Polling Rate | ~1ms | ~5ms | ~1ms |
| Players per Board | 1 | 2–4 | 1 |
| Console Support | PC only | PC only | PC + All Consoles |
| Analog Support | No | No (base) | No (base) |
| SOCD Cleaning | No | No | Yes |
| Firmware Updates | No | Yes | Yes |
| Best For | Budget/Casual | Multi-player/MAME | Fighting Games/Premium |
Which One Should You Buy?
Budget build, casual gaming: Zero Delay. Save your money for better components elsewhere.
Multi-player MAME cabinet: I-PAC 2 or I-PAC 4. The keyboard emulation and multi-player support make it the obvious choice.
Premium build, fighting games, or console compatibility: Brook UFB. It's the best encoder on the market, period.
My builds: I use the Brook UFB in every premium G&G Arcade cabinet because my customers deserve the best input experience possible. For budget builds or personal projects, I'll use an I-PAC without hesitation.
The encoder board is one of those components where you get exactly what you pay for. Choose based on your actual needs, not marketing hype.
If you go with an I-PAC, you will need to configure it using the WinIPAC software from Ultimarc. This step-by-step tutorial from Arcade-One covers the I-PAC 2, I-PAC 4, and Mini-PAC, showing how to assign keys, set up shift functions, and save configuration profiles. It is a great resource to bookmark before your build.
WinIPAC Tutorial: How To Configure I-PAC2, I-PAC4 or Mini-PAC Encoders
by Arcade-One
Related Reading
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What Is an AI Arcade Assistant (and Why Does Your Cabinet Need One)?
Controller Chuck, one of the 9 AI agents in Arcade Assistant, handles encoder configuration automatically. Learn how it works.
The 7 Most Common Mistakes in DIY Arcade Builds (and How to Avoid Every One)
Cheap encoder boards causing input lag is one of the most common DIY mistakes. This guide covers what to watch out for.
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