This configuration is working fine for me.
Hardware:
-AMD Athlon II X3
-Gigabyte GA-970A-UD3
-XFX PRO1250W 80PLUS Gold PSU @240V
-4GB Kingston ValueRAM
ATI RADEON 5770@231Mh/s ~55C
disabled: 0
# core_speed_0: 300
# core_speed_1: 875
core_speed_2: 1010
# mem_speed_0: 300
# mem_speed_1: 300
mem_speed_2: 300
# core_voltage_0: 1.125
# core_voltage_1: 1.125
# core_voltage_2: 1.125000
fan_speed: 85
kernel: phatk2
kernel_params: BFI_INT VECTORS FASTLOOP=false AGGRESSION=11
pool_file: /etc/bamt/pools
pool_timeout: 180
monitor_temp_lo: 45
monitor_temp_hi: 80
monitor_load_lo: 80
monitor_hash_lo: 125
monitor_fan_lo: 2000
monitor_reject_hi: 1
Refurbished Sapphire 5830@301Mh/s ~60C
disabled: 0
# core_speed_0: 300
# core_speed_1: 600
core_speed_2: 930
# mem_speed_0: 300
# mem_speed_1: 300
mem_speed_2: 300
# core_voltage_0: 1.125
# core_voltage_1: 1.125
# core_voltage_2: 1.125000
fan_speed: 85
kernel: phatk2
kernel_params: BFI_INT VECTORS FASTLOOP=false AGGRESSION=11
pool_file: /etc/bamt/pools
pool_timeout: 180
monitor_temp_lo: 45
monitor_temp_hi: 80
monitor_load_lo: 80
monitor_hash_lo: 125
monitor_fan_lo: 2000
monitor_reject_hi: 1
GigaByte 5850@386Mh/s ~60C
disabled: 0
# core_speed_0: 300
# core_speed_1: 600
core_speed_2: 920
# mem_speed_0: 300
# mem_speed_1: 300
mem_speed_2: 300
# core_voltage_0: 1.125
# core_voltage_1: 1.125
# core_voltage_2: 1.125000
fan_speed: 85
kernel: phatk2
kernel_params: BFI_INT VECTORS FASTLOOP=false AGGRESSION=11
pool_file: /etc/bamt/pools
pool_timeout: 180
monitor_temp_lo: 45
monitor_temp_hi: 80
monitor_load_lo: 80
monitor_hash_lo: 125
monitor_fan_lo: 2000
monitor_reject_hi: 1
ASUS 5870@455Mh/s ~65C
disabled: 0
# core_speed_0: 300
# core_speed_1: 600
core_speed_2: 990
# mem_speed_0: 300
# mem_speed_1: 300
mem_speed_2: 300
# core_voltage_0: 1.125
# core_voltage_1: 1.125
# core_voltage_2: 1.125
fan_speed: 85
kernel: phatk2
kernel_params: BFI_INT VECTORS FASTLOOP=false AGGRESSION=11
pool_file: /etc/bamt/pools
pool_timeout: 180
monitor_temp_lo: 45
monitor_temp_hi: 80
monitor_load_lo: 80
monitor_hash_lo: 125
monitor_shares_lo: 1