It could be as simple as GW2 running better with Nvidia cards than AMD. I have i5 and GTX 970 and I run the game better than you, according to your description. I get ~80 in most open world areas. ~50 in cities and ~40 in LA. I get better fps if I tone down some of the graphical settings. Normally video games are more reliant on the GPU. A very good GPU alongside a decent CPU works much better, in most cases, than vice versa. MMORPGs are different in this regard however because they are more reliant on the CPU. GW2 is just badly optimized though so it could be anything. You have a really good CPU so I highly doubt it is casuing any issue. I don't know too much about AMD cards so somebody else could chime in with their experience with AMD and GW2.
It could be as simple as GW2 running better with Nvidia cards than AMD. I have i5 and GTX 970 and I run the game better than you, according to your description. I get ~80 in most open world areas. ~50 in cities and ~40 in LA. I get better fps if I tone down some of the graphical settings. Normally video games are more reliant on the GPU. A very good GPU alongside a decent CPU works much better, in most cases, than vice versa. MMORPGs are different in this regard however because they are more reliant on the CPU. GW2 is just badly optimized though so it could be anything. You have a really good CPU so I highly doubt it is casuing any issue. I don't know too much about AMD cards so somebody else could chime in with their experience with AMD and GW2.
