In order to build a PC capable of handling top games and resource intensive AI applications, you are going to need a decent graphics card. The MSI Gaming GeForce RTX 4060 Ti 8GB GDRR6 is worth a look. It has a 128-bit bus and memory interface. It has two fans on a huge heatsink for cool operation. The fans are smart enough to stop when temperatures are low to reduce noise.
This graphics card supports up to 7680 x 4320p resolution. It has 3 x DP and 1 HDMI 2.1 port. It has a built-in encoder for livestreaming. It features NVIDIA DLSS 3 for AI boosted performance. You can find out more here.