Building a custom mechanical keyboard isn’t just about picking switches or keycaps, it starts with the heart of your board: the PCB. And when it comes to Tenkeyless (TKL) layouts with mini USB ports, two PCBs consistently stand out in the community: the Mechlovin’ Infinity 87.5 and the GON NerD TKL PCB.
If you’ve been searching online for:
“Which TKL mini USB PCB is best in 2025?”
“Mechlovin Infinity 87.5 vs GON NerD, what should I choose?”
“Best PCB for a TKL mechanical keyboard with mini USB?”
You’re not alone, and you’re in the right place.
In this detailed head-to-head review, we’re comparing Mechlovin’ Infinity 87.5 vs GON NerD in terms of:
- Build quality
- USB compatibility (Mini USB vs USB-C)
- Firmware support (QMK/VIA vs NerDy GUI)
- RGB capabilities
- Real-world builder feedback
While both boards cater to serious keyboard enthusiasts, they take slightly different approaches to performance and customization. The Mechlovin’ 87.5 offers modern flexibility with support for both Mini USB and USB-C, along with full QMK and VIA integration. On the other hand, the GON NerD TKL brings an old-school vibe with its soldered simplicity, onboard RGB, and dedicated Mini USB interface, making it a favorite among those who value reliability over reprogrammability.
Whether you’re a first-time builder, a soldering veteran, or just looking to upgrade your old-school setup, this guide is built to help you decide which TKL mini USB PCB deserves a spot in your next custom keyboard.
Let’s explore and by the end, you’ll know exactly which PCB is the right fit for your 2025 build.
What Is a TKL Mini USB PCB?
A TKL mini USB PCB is a printed circuit board specifically designed for Tenkeyless (TKL) mechanical keyboards that use a Mini USB port for connectivity. To break it down:
- TKL stands for Tenkeyless, which means the keyboard layout excludes the number pad (usually the last 17 keys on the right side), resulting in an 87-key setup.
- Mini USB refers to the type of connector on the PCB. Unlike newer USB-C ports, Mini USB is an older, rectangular 5-pin connector that was commonly used in keyboards from the early 2010s.
- PCB (Printed Circuit Board) is the foundational component that connects your switches to your computer. It determines how your keyboard functions including layout support, programmability, lighting features, and more.
But why do people still care about Mini USB PCBs in 2025?
Despite newer USB standards like USB-C gaining popularity, Mini USB PCBs remain relevant for several reasons:
- Legacy case compatibility: Many high-end keyboard cases (especially Korean customs) were originally built for Mini USB connections.
- Reliable connection: Mini USB connectors are durable and secure, often providing a tighter fit than USB-C.
- Aesthetic & retro builds: Enthusiasts building retro-style or classic-themed keyboards often prefer Mini USB for authenticity.
So, when you’re browsing for the best TKL mini USB PCB, you’re not just choosing a part, you’re deciding the core identity of your keyboard. From firmware flexibility to soldering preferences, your PCB shapes how the keyboard feels, performs, and even sounds.
Overview of the Mechlovin’ Infinity 87.5
The Mechlovin’ Infinity 87.5 is a favorite among mechanical keyboard enthusiasts who want a perfect balance of modern features, DIY flexibility, and firmware freedom all packed into a TKL mini USB PCB that’s designed for 2025 standards.
This PCB was designed by the Mechlovin’ team, a group well-known in the custom keyboard community for producing open-source PCBs that are QMK- and VIA-compatible, reliable, and incredibly builder-friendly. It supports the standard Tenkeyless (87-key) layout, making it compatible with a wide range of TKL keyboard cases especially those with Mini USB or hybrid cutouts.
🌟 Key Features of the Mechlovin’ Infinity 87.5
Here’s what makes this PCB stand out:
- Dual USB Port Compatibility (Mini USB + USB-C):
While this blog focuses on Mini USB PCBs, the Mechlovin’ 87.5 gives you the freedom to choose between a Mini USB port for retro-style builds or USB-C for modern convenience. This makes it incredibly versatile for any case or cable setup. - Full QMK + VIA Support:
The PCB is fully programmable using QMK firmware, and VIA compatibility makes it easy to remap keys, program macros, and tweak lighting no coding required. Whether you’re building your first board or tweaking your 12th, you’ll appreciate the simplicity. - Per-Key RGB & Underglow:
If you’re a fan of aesthetics, the 87.5 doesn’t disappoint. It supports per-key RGB lighting and underglow LEDs, all configurable through QMK. This gives you near-limitless personalization. - Soldered Build (No Hot-Swap):
It requires you to solder your switches, which may not be ideal for beginners but it gives a more secure and “permanent” typing feel. Most experienced builders actually prefer soldered PCBs for this reason. - MX-Compatible Switch Support:
Compatible with all Cherry MX-style mechanical switches, so you’re free to use anything from Gaterons to premium tactiles like Holy Pandas. - Daughterboard Option (Flex Cut Friendly):
The Infinity 87.5 can also work with daughterboards, which are especially useful for builds that require soft mounting or case flex. It’s designed with this in mind.
🧑💻 Who Is It For?
If you’re someone who:
- Loves programming and tweaking your layout through QMK or VIA
- Wants both Mini USB and USB-C options for future-proofing
- Prefers per-key RGB lighting and visual effects
- Enjoys the process of soldering and permanent builds then the Mechlovin’ Infinity 87.5 might be your ideal TKL PCB.
It’s particularly popular with custom builders who use high-end TKL cases like the Tofu84, Bakeneko65 (TKL version), and Korean boards that support Mini USB daughterboards.
Overview of the GON NerD TKL PCB
When it comes to premium, enthusiast-grade builds, the GON NerD TKL PCB has earned its reputation as a legendary choice. Designed by GON Korea, this Mini USB-only TKL PCB appeals to those who value clean aesthetics, ultra-low latency, and refined build quality, though it’s not for the faint of heart when it comes to setup.
In 2025, the GON NerD still holds strong for keyboard builders who want maximum stability, distinct RGB aesthetics, and a proprietary configuration experience that leans more “premium niche” than “plug-and-play.”
🔩 Standout Features of the GON NerD PCB
Let’s dive into what makes the GON NerD PCB tick:
- Mini USB Only – By Design
While newer PCBs often adopt USB-C, GON keeps it Mini USB only for tight port precision and mechanical durability. This is ideal for users building inside high-end Korean cases that were originally designed for this format. - Proprietary NerDy GUI Software
Instead of QMK or VIA, this board uses GON’s NerDy GUI, which provides deep-level control for matrix programming, key assignments, and RGB behavior. However, it comes with a steep learning curve and limited documentation in English. - Per-Key RGB with Clean Signal Routing
RGB is integrated elegantly on the NerD PCB, and its signal routing ensures minimal interference and flickering, perfect for clean, aesthetic builds. It may not be as flexible as QMK in terms of lighting layers, but it’s more stable out of the box. - Exceptional Build Quality
The GON NerD is known for its premium PCB materials, tighter tolerances, and reliable voltage management. It’s less prone to static damage and supports long-term usage without degradation, making it ideal for showcase builds. - Stable, Soldered-Only Design
Like the Mechlovin’, it doesn’t offer hot-swap. But the GON prioritizes signal consistency and durability, making it a go-to choice for precision typists and competitive mechanical keyboard users.
🔧 Ideal Use Cases for the GON NerD PCB
The GON NerD is best for:
- Collectors and pro builders looking for top-tier Mini USB PCBs
- Users who don’t mind learning proprietary software for deeper control
- Builders using older or Korean-style TKL keyboard cases
- RGB lovers who want minimal flicker and refined signal paths
- Enthusiasts seeking rock-solid stability over configurability
It’s less suitable for beginners or users who prioritize QMK/VIA ease of use.
⚠️ Availability & Buying Note (2025)
One key downside: the GON NerD TKL PCB is hard to find. Most listings today are secondhand or found via Korean mechanical keyboard forums. It’s rarely available through traditional keyboard vendors, making it somewhat of a collector’s item rather than a beginner-friendly pick.
Head-to-Head Comparison: Mechlovin’ Infinity 87.5 vs GON NerD TKL PCB
Now that we’ve explored each PCB individually, let’s compare them side by side in the areas that truly matter to builders, compatibility, ease of use, features, build quality, and value in 2025.
Whether you’re a beginner planning your first custom build or an experienced modder looking for the next upgrade, this head-to-head comparison will help you decide which TKL mini USB PCB deserves a place in your keyboard.
🔌 USB Port & Compatibility
| Feature | Mechlovin’ Infinity 87.5 | GON NerD TKL PCB |
|---|---|---|
| Port Type | Mini USB + USB-C | Mini USB only |
| Case Compatibility | Universal TKL support | Mostly Korean-style TKL |
| Daughterboard Option | Yes | Yes |
Verdict:
The Mechlovin’ wins on flexibility with support for Mini USB and USB-C. It’s easier to find compatible cases and cables in 2025.
🧠 Firmware & Software Support
| Feature | Mechlovin’ Infinity 87.5 | GON NerD TKL PCB |
|---|---|---|
| Firmware | QMK & VIA | Proprietary (NerDy) |
| Ease of Programming | Beginner-friendly | Steep learning curve |
| Lighting Config | Advanced RGB via QMK | Stable RGB, less customizable |
Verdict:
If you prefer drag-and-drop programming or QMK macros, go with Mechlovin’. GON is better for pros who want ultra-stable RGB and can handle proprietary software.
🔧 Build Style & Construction
| Feature | Mechlovin’ Infinity 87.5 | GON NerD TKL PCB |
|---|---|---|
| Hot-Swap | ❌ No (solder-only) | ❌ No (solder-only) |
| PCB Quality | High | Ultra-Premium |
| Durability | Strong | Military-grade feel |
Verdict:
Both are solder-only, so beginners might struggle. But GON wins on build quality and long-term durability, with tighter tolerances and superior protection.
🎨 Aesthetics & RGB Implementation
| Feature | Mechlovin’ Infinity 87.5 | GON NerD TKL PCB |
|---|---|---|
| Per-Key RGB | Yes | Yes |
| Underglow | Yes | No |
| Custom Effects | Yes (via QMK) | Limited |
Verdict:
Mechlovin’ gives you more flexibility for lighting effects, layers, and underglow, while GON focuses on cleaner, flicker-free RGB basics.
💸 Availability & Price in 2025
| Feature | Mechlovin’ Infinity 87.5 | GON NerD TKL PCB |
|---|---|---|
| Availability | Widely available | Rare, secondhand only |
| Typical Price | $40–$60 | $80–$150+ |
Verdict:
Mechlovin’ is easy to buy and affordable. The GON NerD is for collectors and niche fans, but hard to get your hands on in 2025.
🏆 Overall Winner?
| Category | Winner |
|---|---|
| Beginner Friendly | Mechlovin’ Infinity 87.5 |
| Customization & Firmware | Mechlovin’ Infinity 87.5 |
| RGB Clarity | GON NerD TKL |
| Premium Feel | GON NerD TKL |
| Overall Value in 2025 | Mechlovin’ Infinity 87.5 |
The Mechlovin’ Infinity 87.5 takes the crown for most users, especially those looking for a flexible, modern, and beginner-accessible TKL mini USB PCB in 2025.
That said, if you’re a collector or pro user building a Korean-style TKL and want that premium feel, the GON NerD still stands strong, just be ready for some software learning and hunting down a seller.
Typing & Gaming Experience (Sound, Feel & Input Latency)
When it comes to custom mechanical keyboards, specs are great—but how a PCB feels and responds during real-world use is what truly sets it apart. Let’s break down how the Mechlovin’ Infinity 87.5 and GON NerD TKL perform in the areas that matter most to keyboard enthusiasts, gamers, and typists in 2025.
⌨️ Sound Profile & Acoustics
Mechlovin’ Infinity 87.5:
- Offers a crisper, more neutral sound due to its slightly thinner PCB layering.
- Works well with both aluminum and polycarbonate cases.
- Slight flex during typing can enhance thocky tones when paired with lubed linear switches.
GON NerD TKL:
- Known for a deep, dense sound signature—ideal for fans of a muted, “marble-like” tone.
- PCB’s rigidity and premium thickness reduce vibration noise.
- Pairs beautifully with FR4 plates or full aluminum cases for extra dampening.
🗣️ User Insight: If you’re building for acoustics, GON’s thicker design wins for deep sound, while Mechlovin’ suits those seeking a lighter, more resonant sound profile.
💡 Typing Feel & Switch Support
Mechlovin’ Infinity 87.5:
- Slightly more flexible typing experience—great for long sessions.
- Excellent support for various switch types (Cherry, Gateron, Akko, etc.).
- Compatible with most TKL layouts, including split backspace and stepped caps.
GON NerD TKL:
- Rigid typing experience; minimal flex.
- Feels stable and solid under heavy hands—ideal for forceful typists.
- Supports advanced layouts but may require firmware mapping for custom configs.
🖐️ Real-World Takeaway:
Typists who prefer comfort and flex may prefer Mechlovin’. Hardcore users looking for absolute consistency and stability will enjoy GON’s rock-solid design.
⚡ Input Latency & Gaming Performance
Mechlovin’ Infinity 87.5:
- Powered by QMK firmware, optimized for low latency keystrokes.
- Anti-ghosting and full N-key rollover supported.
- High performance for fast-paced FPS and rhythm gaming.
GON NerD TKL:
- Uses proprietary firmware with a focus on polling stability.
- Slightly less configurable for latency tweaking, but still very responsive.
- Favored among competitive gamers in the Korean mech scene.
🎮 For Gamers:
If every millisecond counts, Mechlovin’ offers more customizable latency tuning. However, GON provides consistency and solid performance right out of the box.
🧠 Summary: Typing & Gaming Experience
| Feature | Mechlovin’ Infinity 87.5 | GON NerD TKL PCB |
|---|---|---|
| Sound Profile | Light & Crisp | Deep & Muted |
| Typing Feel | Slight Flex, Ergonomic | Rigid, Ultra-Stable |
| Gaming Performance | Tunable, QMK-powered | Rock-solid latency floor |
| Ideal For | Writers, Daily Typists, Gamers | Competitive Gamers, Modders |
Ease of Installation & Software Configuration
For DIY keyboard builders, how easy a PCB is to install and program can make or break the entire experience. The Mechlovin’ Infinity 87.5 and GON NerD TKL both cater to advanced users, but their installation workflows, software ecosystems, and configuration options differ in ways that could impact your build.
🛠️ Installation Process
Mechlovin’ Infinity 87.5:
- Beginner-friendly solder points and labeled hot-swap headers (for hot-swap builds).
- Supports standard TKL mounting in most custom keyboard cases.
- Clear online guides and community tutorials make first-time installation smooth.
GON NerD TKL:
- Requires manual soldering for all switches, no hot-swap version available.
- Tight tolerances demand precise soldering skills.
- Case compatibility can vary due to non-standard USB mini placement.
🔎 Builder Tip:
Mechlovin’ is clearly more forgiving for newer builders. GON NerD suits experienced soldering pros who enjoy full control over their builds.
💻 Software & Firmware Configuration
Mechlovin’ Infinity 87.5:
- Runs on QMK and VIA, which are highly customizable and beginner-accessible.
- VIA support enables real-time key remapping without flashing firmware.
- Supports macros, layers, RGB lighting (if present), and custom layouts with ease.
GON NerD TKL:
- Uses GON’s proprietary firmware tools, which are powerful but less intuitive.
- Software is closed-source and Windows-only, requiring more technical setup.
- Remapping and macro support are available, but not as streamlined as VIA.
💡 Firmware Note:
VIA and QMK are widely supported and community-maintained, offering broader resources. GON’s software is more niche but deeply functional once mastered.
🔌 Connectivity & Port Layout
- Both PCBs use Mini USB connectors a rarity in 2025 but still functional.
- Mechlovin’s USB port is center-aligned, making it compatible with most cases.
- GON’s USB port is offset, which can limit your case selection or require modding.
🧠 Summary: Installation & Software
| Feature | Mechlovin’ Infinity 87.5 | GON NerD TKL PCB |
|---|---|---|
| Installation Ease | Beginner-Friendly | Advanced Only |
| Hot-Swap Support | Yes (some variants) | No |
| Software Platform | QMK + VIA | GON Config Tool |
| USB Port Alignment | Center | Offset |
| Ideal User Type | DIY Hobbyists, Modders | Pro Builders, Customizers |
Mini USB vs USB-C: Does It Still Matter in 2025?
In 2025, USB-C has become the universal standard for keyboards, phones, and nearly every device imaginable. So, it’s fair to wonder: why are premium PCBs like the Mechlovin’ Infinity 87.5 and GON NerD TKL still using the older Mini USB format?
Let’s dive into the reasons and whether it actually affects your experience.
🧭 Why Mini USB Still Exists on TKL PCBs
Despite being outdated on the consumer tech side, Mini USB is still widely used in enthusiast-level PCBs for two key reasons:
- Stability & Durability:
Mini USB connectors are mechanically stronger than USB-C. The thicker metal casing and deep port insertion make it less prone to breaking during repeated plug/unplug cycles. - Legacy Case Compatibility:
Many popular TKL cases from the past decade were designed with Mini USB port positioning in mind. For custom builders reusing older cases or sticking to certain mounting standards, Mini USB still fits best. - Design Simplicity for Manufacturers:
USB-C requires extra layers of circuitry for handling power delivery and reversible orientation. For PCBs that don’t need high power or video output, Mini USB simplifies both cost and production.
💥 USB-C’s Advantages in 2025
Of course, USB-C comes with undeniable modern benefits:
- Reversible Plug: No need to fumble or align orientation.
- Higher Current Handling: Useful for RGB-heavy or wireless hybrid keyboards.
- Future-Proofing: Works seamlessly with newer laptops and hubs.
Yet, these advantages don’t always matter for mechanical keyboard PCBs, which transmit minimal power and data.
⚠️ Real-World User Concerns
- If you’re using a coiled or custom cable, most enthusiasts already buy detachable cables with Mini USB ends, so the connector isn’t a dealbreaker.
- However, finding high-quality Mini USB cables in 2025 is getting harder and more expensive, which could be a long-term inconvenience.
🧩 Tip: If you’re buying a PCB today and want true future-proofing, check if the board offers USB-C through a daughterboard or adapter.
Pricing, Availability & Value for Money
When comparing the Mechlovin’ Infinity 87.5 and GON NerD TKL, it’s not just about specs or features, price-to-performance and how easy it is to get your hands on the board also matter. Especially in 2025, where mechanical keyboard components can fluctuate in price due to demand, group buys, or manufacturing limits.
Here’s how these two TKL Mini USB PCBs stack up when it comes to cost, availability, and long-term value.
💵 Mechlovin’ Infinity 87.5: Affordable & Accessible
Mechlovin’ has built a reputation for offering feature-rich PCBs at reasonable prices, making them a favorite among both newcomers and seasoned builders.
- Average Price: $45–$65 depending on the vendor and version (hot-swap vs solder-only).
- Availability: Commonly stocked at major keyboard vendors like KBDfans, Divinikey, and MyKeyboard.eu.
- Shipping: Global shipping available; fast fulfillment in the U.S. and EU.
- Variants: Offers multiple layouts and revisions, so you can pick the one that suits your case and layout best.
- Aftermarket: Easy to find on r/mechmarket and Discord trade channels.
✅ Best For: Builders on a budget or those who want reliable availability without group buy delays.
💎 GON NerD TKL: Premium Price, Limited Stock
GON NerD PCBs are boutique-level offerings that tend to come in waves via group buys or small-batch production runs.
- Average Price: $75–$100+ (PCB alone).
- Availability: Rarely in stock, most are sold through GON’s website or via limited group buys.
- Shipping: Ships from Korea; higher international shipping fees.
- Customization: Sometimes bundled with optional daughterboards or switch plates.
- Aftermarket: Harder to find; tends to retain value due to rarity.
✅ Best For: Enthusiasts looking for a high-end, rare component who don’t mind waiting or spending more.
🧾 Value Breakdown Comparison
| Feature | Mechlovin’ Infinity 87.5 | GON NerD TKL PCB |
|---|---|---|
| Price Range (USD) | $45–$65 | $75–$100+ |
| Availability | Widely Available (In Stock) | Rare, Group Buy Only |
| Shipping | Global & Affordable | Expensive & Region-Limited |
| Aftermarket Resale | Easy to Find & Sell | Retains Value, Hard to Find |
| Best For | Everyday Builders & Modders | Premium Enthusiasts & Collectors |
Final Verdict: Which TKL Mini USB PCB Should You Choose in 2025?
When deciding between the Mechlovin’ Infinity 87.5 and the GON NerD TKL, it really comes down to your priorities. If you’re after modern firmware support like QMK and VIA, easy availability, and a budget-friendly price tag, the Mechlovin’ Infinity 87.5 is a fantastic all-rounder. It’s especially ideal for builders who want a plug-and-play experience, great community documentation, and flexibility in layout support without breaking the bank.
On the flip side, the GON NerD TKL is more of a luxury pick. It’s designed for those who value build exclusivity, boutique craftsmanship, and don’t mind waiting through a group buy or paying a premium for a rare component. While it lacks VIA support and is more complex to configure, it makes up for that with top-tier materials and a distinctive aesthetic that stands out in high-end custom builds.
Ultimately, if you want performance, accessibility, and future-proofing, go with Mechlovin’ Infinity 87.5. If you want rarity, build prestige, and don’t mind complexity, GON NerD TKL delivers a unique experience. Whichever you choose, both are excellent TKL mini USB PCBs that still hold strong in 2025.
Frequently Asked Questions (FAQs)
What is a TKL Mini USB PCB?
A TKL Mini USB PCB is a printed circuit board made for tenkeyless (TKL) mechanical keyboards that uses a Mini USB connection. TKL boards exclude the number pad, offering a more compact layout while retaining function and arrow keys. These PCBs are favored for custom builds that need space-saving without sacrificing utility.
Is Mechlovin’ Infinity 87.5 compatible with VIA and QMK?
Yes, the Mechlovin’ Infinity 87.5 supports both QMK and VIA, making it user-friendly for easy key remapping and layout customization. It’s perfect for beginners and enthusiasts who want flexible firmware support without flashing manually.
Does the GON NerD TKL PCB support VIA?
No, the GON NerD TKL PCB does not support VIA. It uses its own firmware, which requires more advanced setup. While powerful, it’s less beginner-friendly compared to QMK-compatible boards like Mechlovin’s.
Can I replace a USB-C PCB with a Mini USB PCB?
Only if the keyboard case supports a Mini USB port. Many modern cases use USB-C, so switching may require case modifications. USB-C is generally more future-proof, but Mini USB still has its place in certain premium or retro-inspired builds.
Which is better in 2025: Mechlovin’ Infinity 87.5 or GON NerD TKL?
It depends. Mechlovin’ Infinity 87.5 is better for most users thanks to VIA/QMK support, ease of use, and affordability. GON NerD TKL is ideal for experienced builders seeking rarity, craftsmanship, and a more hands-on setup. Both are excellent TKL mini USB PCB options in 2025.
