When Putting a CPU Waterblock on a Graphics card, do the RAM small chips REQUIRE Cooling also or just cooling the main middle chip is ok?
You should install a AIO GPU Cooler Water Block made specifically for GPUs rather than use a CPU Water Block.
Here are some examples of AIO GPU Coolers from Amazon: https://www.amazon.com/s?k=GPU+Liquid+Cooler
Many modern GPUs requires cooling the GPU chip, vRAM, and VRM sections of the GPU card.