RetroTINK 5X Launch Edition 4:4:4 Mod Explained

Voultar recently showed a livestream mod for launch edition RetroTINK 5X units, aimed at bringing those earliest boards closer to the 4:4:4 output capability found on later revisions. Before getting into the fun hardware side, there is one important check: look at the serial number inside the RetroTINK 5X firmware and note the letter at the end. If it says C or higher, this mod does not apply to your unit.

The reason is simple. The change is only relevant to the first runs of the RetroTINK 5X, usually described as rev A and rev B boards. Later boards already gained the needed output-side capability through redesigns, so owners of rev C or newer hardware are not missing this particular feature. For many people, that serial check will end the whole story in the best possible way.

Why The Difference Exists

When the RetroTINK 5X first arrived just over five years ago, it was trying to hit a careful balance. The idea was to keep the easy, broadly compatible feel of the RetroTINK 2X, while adding the kind of advanced scaling power people associated with the OSSC, and doing it at a price that made sense for more retro players. It quickly became a strong fit for people who wanted clean console video without turning setup into a weekend project.

One of the small complaints from the more demanding side of the scene was that the earliest units did not offer 4:4:4 lossless output. For normal play, that was not a dramatic problem, but retro video fans tend to care deeply about tiny signal details, especially once CRT masks, sharp pixel edges, and modern 4K displays enter the picture. This mod is aimed at that narrow, detail-focused corner of the RetroTINK 5X audience.

How Later Boards Changed

During the COVID-era parts shortage, Mike had to revise the RetroTINK 5X main board several times so it could use parts that were actually available, while still keeping quality intact. One of those hardware revisions, beginning with board rev C, had a useful side effect: the final output stage had more bit depth available. That opened the door to 4:4:4 lossless output on those later units.

The v4 firmware also changed the conversation by adding a 3840x960 output mode. That is not true 4K in the full vertical sense, but it does let horizontal CRT mask detail be drawn at a 4K level of detail, while the TV handles scaling the 960 vertical pixels. On rev A and rev B boards, this means the television is processing a signal with less color detail than the later 4:4:4-capable boards can provide.

Voultar’s livestream showed a proof of concept for getting around that early-board limitation. The work is not a small tweak. On rev A hardware, the crystal needs to be swapped. On both rev A and rev B units, the circuit also has to be modified so the signal path can support 4:4:4 processing. It is a clever bit of hardware work, but it sits firmly in expert territory.

At Z-retro, our view is that this is a very cool option for skilled modders and early-unit collectors, but not something most RetroTINK 5X owners need to rush toward. Check the revision first, weigh the risk against the visible gain, and treat it as a specialist upgrade rather than a must-have fix.