7990 vs 2x 290? (I don't pay for power got a 1300W psu)

Found a 7990 and 2x 290 for the same price 250$ which one would give the most sol/s?
I have goolged a bit. But all the answers are outdated.

With my 7990 I get just over 500 H/s, but I have dropped the speed a touch to keep it cooler.
Sorry, I cant comment on a 290.

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Which miner and what config for the 7990?

Windows 10
Claymore 11.1
-i 4
Core Voltage 1100 mV
Core Clock 910 MHz
Memory Clock 1500

This gives me 82C and a fan speed of around 60%

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