slow running pc/lagging trying to upgrade from pre built gaming pc

[Lozbox619]

Hi, i'm fairly new to pc gaming and brought a pre built which runs fine but I'm having speed issues and graphics problems in games such as fortnite, only able to run smoothly on medium graphics quality, I'm wanting to eventually be able to play games like hogwarts legacy but at the moment i dont think this pc could take it. heres what im currently running on. (I'm willing to spend the money to upgrade and also worth nothing I'm running on ethernet.)
Mother board - MSI B450M PRO VDH MAX.
CPU - AMD RYZEN 5 3500X 6 CORE
GPU - RADEON (TM) RX 480
RAM - CORSAIR VENGEANCE PRO 16GB DDR4 3600

 

[Lozbox619]

Is your 16gb of memory a single stick or 2 X 8gb ?

its 2x gb

 

[Lozbox619]

I would download MSI afterburner and see what's going on when stutters occur checking, CPU, GPU, memory, etc .

If you want an upgrade then as others have mentioned GPU would be a good choice an rx 6600 would double your FPS over the rx 480.

Asrock Radeon RX 6600 Dual Challenger D 8GB GDDR6 PCI-Express Graphics Card

Order Asrock Radeon RX 6600 Dual Challenger D 8GB GDDR6 PCI-Express Graphics Card now online and benefit from fast delivery.

www.overclockers.co.uk

thank you i'll look into upgrading the gpu i think, also having issues if anything else is open on my pc the stutter is so much worse, it cant seem to handle multi tasking if a game is open and discord/twitch, would that be anything linked to the fact im running on hard drive and not SSD? i heard SSD is better for speed/ multitasking?