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HD 7870 Crossfire with 700 Watt power supply?

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March 10, 2013 1:43:15 AM

I want to upgrade my graphics card and have two Radeon HD 7870's running in crossfire.
But i'm wondering if my 700 watt power supple could handle that?
a c 105 B Homebuilt system
a b ) Power supply
a c 122 U Graphics card
March 10, 2013 1:48:57 AM

Gonna need more information than "700W Power Supply". What model is it?
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March 10, 2013 1:52:57 AM

CoolerMaster Extreme Power Plus 700w
BTW it does not have enough pci-e power cables so i'm gonna get an adapter (Sata power to pci-e)
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a c 105 B Homebuilt system
a b ) Power supply
a c 122 U Graphics card
March 10, 2013 3:06:26 AM

That PSU can actually give 624W through the 12v rail (which powers the CPU,GPU and mobo/RAM). A 7870 has a ~200W power draw under load and assuming the worst case scenario of an AMD or LGA2011 CPU, that's a total load draw of ~525W. You should be fine for wattage, even with overcloking.

The PSU in all honesty should be labelled as a 650 or 600W unit, not 700W. Its part of why Coolermaster aren't recommended much when it comes to PSU's.
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March 10, 2013 3:13:08 AM

manofchalk said:
That PSU can actually give 624W through the 12v rail (which powers the CPU,GPU and mobo/RAM). A 7870 has a ~200W power draw under load and assuming the worst case scenario of an AMD or LGA2011 CPU, that's a total load draw of ~525W. You should be fine for wattage, even with overcloking.

The PSU in all honesty should be labelled as a 650 or 600W unit, not 700W. Its part of why Coolermaster aren't recommended much when it comes to PSU's.


Ok thanks :D 
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