GPU does it matter if its 4gb 8gb? and which brand?

[HAPE]

for example if i want to mine something with rx 570 4gb and 8gb? does it changes something? and if not what it changes then? because i think most profitable compared to price is rx 570 for mining? so i wonder 4gb or 8gb?

and is there any differencies in brand? like asus or msi or gigabyte? they might provide some legitly overclock?

[Vann]

8GB GPU's usually will have faster memory than 4GBs, but for the most part, there is not much difference in hash rate between 4GB and 8GB GPU's of the same model. The benefit of 4GB cards is you can buy more cards for the same amount of money, so you will get a better hash/$ performance. The main benefit with 8GB is slightly better dual mining performance, more overhead for future Dag file growth on Ethash coins like ETH/ETC and better future resale value.

The diffrence between GPU brands is better cooling and build quality on some cards and better overclocking depending on the memory type on the card.

[sexycoin69]

I just bought 580's went with 4gb, wouldn't be super concerned about 8gb since the primary user (ethereum) will switch to POS