Hi OP, bobben2 gave the perfect answer for phoenix miner, if that doesn't work try changing the OS, windows 10 OS can be a let down for few computer configurations, you can give hiveOS a try and you will get the maximum performance out of the box, you can first add extra ram too, some solve hashrate problem on windows by adding more ram stick
Hi! Thanks for the reply 
I have 2 ram stick and I am always testing my new cards and flashing custom bios with my win PC before adding them to a linux rig but maybe this time a will try on linux to see if it is better.