I own an Rx 580
based on some benchmarks 2x rx580 perform identically to an Rx 5700xt
So instead of spending $400 on this card, I will spend half the amount on a second Rx 580
Based on online wattage calculators I will need around 850W. Will a Corsair RM850 Watt 80+ Gold PSU be appropriate for this build? I was searching for a PSU with more wattage becase I thought that I will need it.
A 5700xt will eclipse 580's in crossfire in 99% of scenarios.
Dual gpu performance is all but dead in modern titles.
Sell your 580, get a 650W psu and a decent single gpu (even a 5600xt is way way better than any crossfire configuration) , you'll be far happier.
If you really must run 580 crossfire then a good 750w psu is more than enough.
The xilense x models are OK but that's all they are, mediocre at best but with gold efficiency
It always surprises us how often we get requests for Crossfire and SLI benchmarks. Despite flatout telling readers not to invest in either technology for years now,...
www.google.com
Thats about the newest Comparison I can find for crossfire on modern titles.