There are two 4k capable scalers announced for retro games:
- Retrotink 4k
- Made by the same guy who made the Retrotink 5x Pro among other scaling devices such as the Retrotink 2x, RGB2COMP and COMP2RGB devices. The 5x is a scaler that works better than the OSSC and can go to higher resolutions along with more effects to help emulate the CRT look and feel.
- Morph 4k by PixelFx
- Made by the same team behind the DCDigital (aka. DCHDMI), PS1Digital and now the Retro G.E.M. which is the recently announced console agnostic HDMI modification.
There is also the OSSC Pro, but the details are sparse and we haven’t had too many updates about it.
PixelFX has lost any and all respect that I had for them and almost made me want to sell my PS1Digital modded system just to be rid of owning anything they’ve touched. Their announcement video for the Retro GEM took the piss on Digital Foundry by doing a cringe-inducing “parody” called “Digital Infidelity” and was wildly inappropriate. Couple that with the news that the GEM would have DRM on the extra features for an additional $80 once you bought the device and it left a very sour taste in my mouth.
Prior to their terrible announcement, I was determined on buying what ended up being GEM as I could get HDMI out right from a PS2 I bought specifically for that mod and now I won’t bother.
If you’re going to be doing any amount of soldering, I’d highly suggest the Hakko FX888D. You want to use a good iron, otherwise you’ll get poor results and/or be more likely to hurt yourself. (Hitting one’s thumb with a hot soldering iron is not fun.)