Yes, all true. The A10 6800k is waaaaaaaaaaaay better than any intel IGPU has. But you need a high latency ram to utilize the iGPU more. I also have an A10 setup + an 1866mhz 8gb ram. It's very2 fast. I can play games smoothly. Mostly medium settings.
If you can get 2133mhz ram, go for it.