Mining with R9 270X and 7850

[mtrix4]

I'm gaming/mining with an XFX R9 270X that is powered by an EVGA 600B 80+bronze psu but I want to add my XFX 7850 1gb core edition to this setup for mining purposes only. My PSU only has 2 pci-e connectors for the R9 270X but I have a pci-e to 2 molex connector for my 7850 that I want to use. Will my psu be able to handle this setup? I don't mine 24/7. Just around 5-7 hours a day when I'm not gaming.

Here is the rest of my setup:
I5 3570k
WD 1tb caviar black
500 GB hd from an old HP computer
Asus p8b75-v mobo
Crucial 8 GB ram
Samsung 120gb ssd
DVD rw drive
PCI Cable tv tuner card

Any help would be appreciated.

 

[Turb0Yoda]

I calculated 550 so yes, But I would get a higher rated psu just in case.

 

[ko888]

It should be electrically sufficient but there won't be enough PCI Express supplementary power connectors due to EVGA's cost cutting to meet the price point for that PSU.

 

[mtrix4]

Thanks for the responses. I upgraded to the EVGA 600B when I got my R9 270x then started to get into mining crypto-currencies and totally forgot about my Radeon 7850. I really don't want to upgrade my PSU again as I just bought the EVGA. Hopefully I can utilize the double molex to pci-e connector that I have to power the 7850 without any problems since I don't mine 24/7.