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PSU for 2x 7870

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  • Power Supplies
  • Components
  • Product
Last response: in Components
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January 4, 2013 5:35:30 AM

I need help deciding whether to get a higher Watt PSU or not for CrossFire 7870. I currently have a 600W X-Power Pro PSU.

All of the following items will be in my rig once I get the ordered ones in the mail.

Ordered:
-3570k(Going to OC to ~4.5ghz)
-MSI Z77 Big Bang MPower

Owned:
-x2 (2x4gb) G.Skill Sniper 1600 1.5v(16gb/4 dimms)
-Hyper 212 EVO
-XFX Radeon HD 7870(1.1ghzOC)
-Intel 330 180gb SSD
-1TB 7200rpm HDD
-DvdRW-24
-6 fans via motherboard pins
-3 fans molex

PcPartPicker states 550W for all of these items including a 2nd 7870 but excluding the fans, but I do not think this is accurate and especially not since I want to OC the CPU/GPU(s).

What do you guys think?

Thank you:) 

More about : psu 7870

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a b ) Power supply
January 4, 2013 7:13:44 AM

550W partpicker is minimum, playing games will pull more power :) 

make sure your psu have enough cable to power on the 2 GPU, using molex adapter means the psu is not ready for them :D 

http://pcpartpicker.com/part/xfx-power-supply-p1750bnlg...
this one is my recommendation
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a c 87 ) Power supply
January 5, 2013 10:50:32 AM

Actually 550W probably is enough for a system with two 7870s. However the 550W PSU needs to be very high quality - which I doubt a "600W X-Power Pro PSU" is - and it needs to have four PCIe connectors (which doesn't happen that often).

Seeing as you are going to have to buy a new PSU then 650 or 750W is a sensible wattage to go for.

Rosewill Capstone-650 ($95 @ Newegg / $3 shipping)
http://pcpartpicker.com/part/rosewill-power-supply-caps...

Review for other Capstones (which are exactly the same, just at different wattages):
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
http://www.techpowerup.com/reviews/Rosewill/CAPSTONE-75...
http://www.hardwaresecrets.com/article/1584
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