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I think overclocking to that level is not a good idea with the op psu so i think 390 is a good choice.


The R9 390 is very likely to be more power hungry than a 970 to the Ops PSU.
When under stress, even its baby brother (R9 380) draws 234W which is only 9W less than a 970!
A 390X draws 363W under stress conditions compared to 243W for a 970.
970 is still gonna be more power efficient than a 390 or 390X!

Stress - http://www.tomshardware.com/reviews/amd-radeon-r9-390x-r9-380-r7-370,4178-10.html
Gaming - http://www.tomshardware.com/reviews/amd-radeon-r9-390x-r9-380-r7-370,4178-9.html
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