-re-seat the GPU
-Use only 1 stick of ram, try all sticks
-check motherboard for red lights
-try different PCI-e connectors
-if you can, try different slots
-if you can try another GPU, if that one works, you will have to RMA the 5870
-You can also try and tell me the bios beep error, that will always tell you exactly whats wrong, you will just need to consult the mobo's manual
skype:noak567
I've had lots of computer related problem, im pretty sure I can help
-Use only 1 stick of ram, try all sticks
-check motherboard for red lights
-try different PCI-e connectors
-if you can, try different slots
-if you can try another GPU, if that one works, you will have to RMA the 5870
-You can also try and tell me the bios beep error, that will always tell you exactly whats wrong, you will just need to consult the mobo's manual
skype:noak567
I've had lots of computer related problem, im pretty sure I can help