if this is how it will be i might give it a try for the tiem being, if it is also profitable, but soemthing is telling me that it is not
Ethereum PoW needs very fast GPU memory access. It is not about the memory bandwidth. So 280x works the same as 290x.
yeah over time as the DAG getts bigger the GPU's hash slower and slower my 280xs were hasing at 26mh/s back in november now they are down to 22mhs
I did find that my 380s do not suffer from this degradation , they hashed at 18mh/s back then are are the same now. So this might mean that newer 300 class GPU's have faster ram than the older GPUs' /shrug
What are the voltage and frequency for your 280x and 380 cards?
everything stock bro , i dont have time to babysit 30+ GPUs lol, the 280x are saphire vaporx , and the 380s and ASUS 4GB models all stock setting
For sapphire 280x, it should be able to run 1000MHz core at 1.1v or lower. If you undervolt, you can save a lot of money.