Win 10 64 Home Pro, 24 g RAM, gigabyte 1156 mobo, GeForce 710 gpu

My computer's old: or the mobo is, a ten year old Gigabyte P56 that functions well enough. 24 gigs of RAM (DDR3), a Sandisk SSD main drive 1 TB, and some other drives and devices, including a Soundblaster G5 audio device. My only beef is that when I plug in too many USB devices my audio quality declines. It gets crackly especially on Youtube. I listen to a lot of music, watch a lot of video.. I upgraded my power supply 4-5 years ago to a 650W. I'm wondering if a more powerful supply would help with the USB drives. I don't want to spend on a new computer when I'm OK with this one.

Thanks all for the years of help.

Arthur