Overclock LC475/P475/Q605 without soldering or spicy-o-clock

[stynx]

No, because I‘m using SwitchRes to define profiles for automatic resolution switching for certain games.
I suppose then that I should do the resistor mod instead, since everthing works great at 40MHz

The resistor mod will only work for 33Mhz as far as i know.
Soft475 also changes the ram timings which might not be properly configured with only the resistor mod for 40MHz.

 

[croissantking]

I recently picked up a couple of LC475 machines and tried out @Phipli's Control Strip Module – initially both topped out at 40MHz.
I upgraded one with a MC88916DW80 and it is now able to go faster. It's stable up to 45MHz, and crashes at 50MHz.

Configuration:

• 68040FE25 (L88M mask) on a PGA adapter
• MC88916DW80
• 70ns internal RAM
• 60ns RAM module
• 80ns VRAM

Continuing my experiments with Soft475, I installed an 88916 onto my other LC475 logic board, intentionally picking one with a different/newer date code. Despite using the same L88M CPU as before, the results are a bit better: I can actually set 50MHz and it works. However, it is unstable. It runs for a few minutes, exhibiting graphical glitches (specifically font rendering, oddly) then crashes.
I will try adding more cooling to the CPU, and see if that helps.