RX 480 8GB vs 4GB?

[BitJunkie556]

I was wondering about the whole memory overclocking thing... As far as I know, 8GB model comes with VRAM at 2000 MHz, whereas 4GB model uses something like 1800 MHz or something like that...

Since Ethereum for example, seems to be more memory intensive, it would appear that the 8GB model is getting a a decent increase in hashrate. But if I overclock the 4GB model's memory to around the same 2000 Mhz, would I essentially be using the 8GB model as far as hashrate, or even gaming performance wise? I would think so, but maybe it's not all about the memory clock speed. It's just, if I can save a few bucks and just overclock to get the same hashrate, why not, you know?

[IamRune]

I believe the 8GB ram is just future proofing at this point in time. 

[adaseb]

Get the 470 4GB. Almost the exact same speed.

[BitJunkie556]

I mean would like $225 be okay for a reference 8GB? I know custom 8GB's can be had for like $250, which by that metric would be pretty good... The main reason I was wondering about the 4 vs 8GB was because of the $190 RX 480 4GB on Ebay. They're Powercolor Red Dragons with a single fan, but getting a new card w/ warranty still seemed like a good idea, vs paying $140 for an R9 380 that could go bad in a month...

Kind of hard to figure it all out, really...