Question about ASUS GeForce TUF GTX 1660S O6G Gaming

Graphics performance is easily an order of magnitude faster than your current integrated graphics card, and the RAM help as well. But the card draws 120 W (if in use), so power consumption will go up, and if your PC has a PSU that doesn't have enough spare capacity (e.g 300W), system stability will become an issue. Recommended for this card is a 450W (or higher) PSU, but if you don't have anything connected to the PC that draws a lot of power and your PC already has a 400W PSU, that will work just fine. If your PSU is 300W or lower, you'll need to spend another 40-50.- on a 500W PSU.