I read some of the xmr stak topic and I saw that they got 800-1000h in their 570 4gb and 8gb cards, I wonder why I only got 600h plus, I am new to cryptonight algo, since I started mining, I only mined eth and other eth base algo.. can somebody here share some advice below is my settings in amd.txt Is there any way to increase my hashrate.. Thanks in advance to those who are willing to help..

HASHRATE REPORT - AMD
| ID | 10s | 60s | 15m | ID | 10s | 60s | 15m |
| 0 | 655.1 | 654.4 | 654.7 | 1 | 672.9 | 673.0 | 672.9 |
| 2 | 675.8 | 675.5 | 675.4 | 3 | 682.3 | 682.4 | 682.3 |
| 4 | 683.4 | 683.2 | 683.1 | 5 | 677.3 | 677.5 | 677.5 |
| 6 | 633.4 | 633.5 | 633.9 | 7 | 652.2 | 654.4 | 655.0 |
| 8 | 655.4 | 655.1 | 655.4 | 9 | 654.8 | 654.8 | 654.5 |
| 10 | 672.3 | 671.8 | 671.8 | 11 | 652.7 | 654.7 | 654.5 |
Totals (AMD): 7967.6 7970.4 7970.8 H/s
-----------------------------------------------------------------
Totals (ALL): 7967.6 7970.4 7970.8 H/s
Highest: 7977.6 H/s
List of 12 cards accordingly
0. RX 570 4GB
1. RX 570 8GB
2. RX 570 8GB
3. RX 570 8GB
4. RX 570 8GB
5. RX 570 8GB
6. RX 570 8GB
7. RX 570 4GB
8. RX 570 4GB
9. RX 570 4GB
10. RX 570 8GB
11. RX 570 4GB
// gpu: Ellesmere memory:3920
// compute units: 32
{ "index" : 0,
"intensity" : 896, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3712
// compute units: 32
{ "index" : 1,
"intensity" : 1000, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3712
// compute units: 32
{ "index" : 2,
"intensity" : 1000, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3920
// compute units: 32
{ "index" : 3,
"intensity" : 1000, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3920
// compute units: 32
{ "index" : 4,
"intensity" : 1000, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3920
// compute units: 32
{ "index" : 5,
"intensity" : 1000, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3712
// compute units: 32
{ "index" : 6,
"intensity" : 1000, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3920
// compute units: 32
{ "index" : 7,
"intensity" : 896, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3920
// compute units: 32
{ "index" : 8,
"intensity" : 896, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3712
// compute units: 32
{ "index" : 9,
"intensity" : 896, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3712
// compute units: 32
{ "index" : 10,
"intensity" : 1000, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},
// gpu: Ellesmere memory:3920
// compute units: 32
{ "index" : 11,
"intensity" : 896, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 1, "mem_chunk" : 2,
"comp_mode" : true
},