So my EVGA GTX 970 SSC was working fine up until yesterday. Then I kept on getting error code 43. I tried all the methods on found on the internet and forum. It works for 1 boot and then goes back to error code 43 until today. It just shows error code 43 in the device manager. I swapped my GTX 970 SSC with an old EVGA GTX 660 and no problems on multiple boots and restarts. I finally found a bios switch on the 970 SSC and moved it to position 2 so far it works perfectly. What is the difference between BIOS 1 and BIOS 2? Also should I RMA the Card?