gtx 660 ti sli error code 43

[dylanwelch95]

i have just installed two gtx 660ti in sli. I see both in the device manager but one has a yellow error code 43. I have tried about everything but nothing is working, can anyone offer any help? thanks

specs
asrock z77 extreme 4
i5 2500k
evga gtx 660 ti 2gb
pny gtx 660 ti 2gb
1000w psu