So that could be a few things. The DRAM light is not always indicative of an actual memory issue. Often, but not always. The DRAM light could be triggered by a problem with bent CPU pins, since they are tied directly to the memory controller. I've seen the DRAM light triggered by a weak power supply that couldn't adequately power everything so the memory wouldn't initialize.
I've even seen a bad graphics card with a shorted circuit board toast one of the motherboard traces and cause a false DRAM code.
First off, why do you have two GTX 1050 ti cards installed? You are aware that you can't SLI those cards right? Is this a mining machine or some other exotic configuration?
What is the model number of your 500w Antec PSU?
Are your graphics cards OC models with six pin supplemental power sockets or are they slot only powered cards?
Did you buy your memory together in a matched set, or separately, and what are the model numbers or number of the kit?
And, you didn't answer the rest of the questions I asked in my first post, as in, what happened between the time it was working and when it stopped working? Did you change anything, different hardware, change configuration settings?
Have you tried removing and reseating the memory? Resetting the bios by turning off the system, removing the cmos battery for five minutes, putting it back and then restoring power and booting up?