Question Upgraded GPU but no substantial FPS increase.

Jun 3, 2019
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So recently I was able to upgrade my GPU from an ancient AMD Radeon R7 240D 2GB to a Sapphire Pulse AMD Radeon RX570 ITX 4GB and in CSGO my average FPS only went up by 40 to 120 FPS and I was expecting more. I completely reinstalled all the drivers and have updated my motherboards BIOS. Is this a problem on the hardware side or is my CPU acting as a large bottleneck in this case?

Other Specs:
  • Intel Core i3 4170
  • 2x4Gb DDR3 RAM @ 1600 MHz
  • ASUS B85M-G motherboard.