Need help with power supply

[OddBook]

I’ve got two sapphire Radeon hd 7970 graphics cards, but only a 520W psu. Each card has 2 8pin connectors on it, so I was wondering if this psu would be enough.

 

https://m.newegg.com/products/N82E16817153158?ignorebbr=1

[Lord Nicoll]

8 minutes ago, OddBook said:

I’ve got two sapphire Radeon hd 7970 graphics cards, but only a 520W psu. Each card has 2 8pin connectors on it, so I was wondering if this psu would be enough.

 

https://m.newegg.com/products/N82E16817153158?ignorebbr=1

Yes, 850 watts should be enough for HD 7970 Crossfire, why you'd use cards that old, Idk, but that's be more than enough. 

[Guest]

850W should be enough wattage for supplying enough power to your cards in crossfire. 

[xsimplyjosh]

You'll need at least an 850W PSU for that in crossfire. Do be aware you could probably upgrade sooner if you can. The newer cards are much more efficient in terms of power usage whilst being faster. which is a plus... just an afterthought in case*

[OddBook]

On 9/20/2017 at 6:55 PM, Lord Nicoll said:

Yes, 850 watts should be enough for HD 7970 Crossfire, why you'd use cards that old, Idk, but that's be more than enough. 

Using cards that old because they were within my budget when I bought them used. Both cards work perfectly well

[Lord Nicoll]

2 hours ago, OddBook said:

Using cards that old because they were within my budget when I bought them used. Both cards work perfectly well

A modern card for the same price as both would probably be comparable in performance, not to mention the needing a higher rated PSU, more power and the need for better airflow in a case (which mostly cost money), it ultimately balances out pretty even. Also crossfire support isn't all that great, watch out for games with no crossfire support.