Why the average hash rate of my Nvidia GTX 1060 6G is only 220H/s

I use my gaming desktop to mine.(Windows 7, e3-1230 v2 DDR 3 8g). The ping to the server is around 80ms. And the solution rate is about 250sol/s. But the average hash rate on the flypool is only 220H/s. Is this number normal?

There will always be a difference between the pool and your mining software. You should look at the average hashrate and compare that to what your mining software is showing for hashrate. You should find they’re very close.