Guys,
New to mining, have 3 x RX 570 4GB. 
Edited config file for like below:

-xpool stratum+ssl://xmr-eu1.nanopool.org:14433
-xwal *myaddress*
-xpsw x

-allpools 1
-h 800
-dmem 1
-tt 75

Currently only getting hash rate of 650 per card.  What changes do I need to make to improve performance?
No overclocking yet.

14:03:04:209   94c   ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
14:03:04:214   94c   º           Claymore's CryptoNote AMD GPU Miner v11.0            º
14:03:04:219   94c   ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
14:03:04:224   94c   
14:03:04:228   94c   b517
14:03:04:436   94c   XMR: 1 pool is specified
14:03:04:446   94c   Main Monero pool is xmr-eu1.nanopool.org:14433
14:03:04:975   94c   OpenCL platform: AMD Accelerated Parallel Processing
14:03:04:983   94c   OpenCL initializing...
14:03:04:988   94c   driver 10.0.2442.12
14:03:04:993   94c   AMD Cards available: 3
14:03:04:997   94c   GPU #0: Ellesmere, 4096 MB available, 32 compute units
14:03:05:040   94c   GPU #0 recognized as Radeon RX 470/570
14:03:05:045   94c   card 0, m1 4096, m2 2880 w 256
14:03:05:050   94c   GPU #1: Ellesmere, 4096 MB available, 32 compute units
14:03:05:125   94c   GPU #1 recognized as Radeon RX 470/570
14:03:05:133   94c   card 1, m1 4096, m2 2880 w 256
14:03:05:142   94c   GPU #2: Ellesmere, 4096 MB available, 32 compute units
14:03:05:151   94c   GPU #2 recognized as Radeon RX 470/570
14:03:05:160   94c   card 2, m1 4096, m2 2880 w 256