Yes i don't know why but sometimes it stays at 3 gh/s instead of 5. I wrote to support and they can't explain why. Restarting cgminer multiple times seems to fix it until a reboot. Also the 24 hour thing i wrote was 24 hours BEFORE selling it
Just to make sure it still works
EDIT: I tested it and i can provide screenshots of cgminer to prove that it hashes at 5 gh/s