Definitely lots of heat.. I am running an
Asus TUF A15 with 2 graphics cards, and I switched out the 1TB SSD with 2 2TB SSDs and the WiFi 5 card with a WiFi 6 card... It also came with 2 fans built in (1 for each card).
I have it sitting on a 5 fan cooler. If I ever need a heater in the winter, this would do the trick ;)