@Luizcc wrote:
As I could see, some graphic cards needs a support holder.
As I have also a heavy cooler such as the "Thermalright Phantom Spirit 120 SE"
Maybe I need also a holder for this type of cooler that is very heavy?
Graphics cards don't necessarily need a support holder, the card is held in place by the PCIe slot and riser bracket. Some users choose to install a support brace to eliminate flex/sag for cosmetic reasons, same reason some choose to do a vertical mount.
Likewise as @johnnyenglish mentions, as long as the CPU cooler is installed correctly there may be a small amount of motherboard flex but nothing that requires additional support, unless the CPU cooler specifically requires horizontal mount only.
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