Nitro OC+ review up on KitGuru.
I've swung back to the opinion that that card is the one to get out of the customs. Seems ahead by more than just a bit of the 480 Strix but consumes more power.
Again KG found AMD's WattMan to be buggy when overclocking and curiously, the software didn't seem to be adding any voltage despite adjusting the setting. Real balls-up for AMD as a lot of reviewers are doing tests with WattMan and coming to the conclusion 3% overclocks are the max...how they haven't managed to sort that out by now is shocking really.
In any case, KG managed 1390Mhz on the 8GB Nitro:
Originally Posted by KitGuru
If you have another £50 to spend then the Sapphire RX 480 Nitro+ OC 8GB delivers better frame rates and we managed to get it stable to 1,390mhz in AMD’s Wattman. As I detailed earlier in the review I don’t feel Wattman is a great software package. Voltage increases didn’t seem to work on the Sapphire cards either so I am confident that when Sapphire release TriXX 3.0 better results will be possible.
We had to deal with another little glitch, also mentioned in our review of the Asus RX480 earlier this week. Target temperature settings would switch on start up from 65c to 75c, and then vice versa. Sapphire are aware of this issue and it has already been reported to AMD. We managed to test both cards at the correct setting of 75c and the fans are nonintrusive, with merely more than a faint whirr audible under load. In a similar fashion to leading cards from all the major manufacturers, the fans switch off at idle, and below a certain temperature threshold.
Right now the best RX 480 available is the Sapphire 8GB Nitro+ OC model. It is not only faster out of the box than the Asus RX 480 Strix OC model we reviewed earlier this week, but it is quieter and £40 less expensive. Below £250 makes more sense to me in today’s highly competitive market.
Both 4GB and 8GB Sapphire RX 480 Nitro+ OC cards are the best available today at their respective price points. The build quality of the cards is exceptional.