dual gpus one psu?

Dezurtblue · Jan 20, 2014

To have 2 gpu's that recuire atleast 600w each, do you need to have 1200w psu to run both gpus? Because 1200w psu aint cheap. And I am not shure what do you guys say?

daswilhelm · Jan 20, 2014

and what 2 gpu's do you have that require 600w each?

James Mason · Jan 20, 2014

Dezurtblue :

No, when they say requiring a 600w PSU, they mean that's the recommended wattage PSU to get to cover the GPU and the everything else in the computer case.
You can use this to calculate a more accurate number of what PSU wattage you need:
http://www.extreme.outervision.com/psucalculatorlite.jsp

Take the recommendation it gives and add some 50-100Ws for good measure.

ko888 · Jan 20, 2014

Dezurtblue :

What will the graphics cards be used for?

If the cards will be used for bitmining then it will draw considerably more power than when the cards are used for gaming.

Dezurtblue · May 9, 2014

I am using the cards for gaming and i want to uppgrade to more harddrives and maybe custome water cooling loop, And go totaly overkill with the psu isn't good eighter i'v heard.

ko888 · May 9, 2014

Cooler Master V Series V1000 (RS-A00-AFBA-G1-EU)
• OEM: Seasonic
• maximum combined +12 Volt continuous current rating of 83 Amps
• Eight (6+2)-pin PCI Express supplementary power connectors
• Full Modular Output Cables: Yes
• Official Intel Haswell Compliance: Yes
• 80 PLUS GOLD Efficiency Certification
• 5 Year Limited Warranty
• Link: https://www.komplett.no/cooler-master-v1000-1000w-psu/791776

XFX ProSeries Black Edition 1050W (P1-1050-BEFX)
• OEM: Seasonic
• maximum combined +12 Volt continuous current rating of 87 Amps
• Six (6+2)-pin PCI Express supplementary power connectors
• Full Modular Output Cables: Yes
• Official Intel Haswell Compliance: Yes
• 80 PLUS GOLD Efficiency Certification
• 5 Year Limited Warranty
• Link: https://www.komplett.no/xfx-proseries-black-edition-1050w-psu/657695

Dezurtblue · May 9, 2014

ko888 :

Ser du refererer til komplett så jeg regner med at du er fra Norge, hva betyr +12Volt 87 ampere? Er dette viktig for strømforsyningen?

ko888 · May 9, 2014

Dezurtblue :

No, I am not Norwegian nor do I speak the language.

For a system using two Radeon AMD Reference Design R9 290X graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 1000 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 68 Amps or greater and have at least two 6-pin and two 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor. Most of the components in a modern desktop computer draw the majority of their power from the +12V rail(s).

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted. Overclocking of a single Reference Design Radeon R9 290X 4GB GDDR5 from 1000MHz GPU and 1250MHz GDDR memory to 1100MHz GPU and 1550MHz GDDR memory has shown an extra 100 Watt increase in power draw (i.e. measured for the graphics card only) from one review I've read. For two cards you should allow for an extra 195 Watts for overclocking of the two graphics cards.

To be safe I would recommend the XFX ProSeries Black Edition 1050W (P1-1050-BEFX) since it has some spare capacity to handle that magnitude of overclocking.

Dezurtblue · May 11, 2014

ko888 :

Dezurtblue :

No, I am not Norwegian nor do I speak the language.

For a system using two Radeon AMD Reference Design R9 290X graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 1000 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 68 Amps or greater and have at least two 6-pin and two 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor. Most of the components in a modern desktop computer draw the majority of their power from the +12V rail(s).

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted. Overclocking of a single Reference Design Radeon R9 290X 4GB GDDR5 from 1000MHz GPU and 1250MHz GDDR memory to 1100MHz GPU and 1550MHz GDDR memory has shown an extra 100 Watt increase in power draw (i.e. measured for the graphics card only) from one review I've read. For two cards you should allow for an extra 195 Watts for overclocking of the two graphics cards.

To be safe I would recommend the XFX ProSeries Black Edition 1050W (P1-1050-BEFX) since it has some spare capacity to handle that magnitude of overclocking.

Thank you this help me out a lot

and is the amps important to watch when you buy a psu?

ko888 · May 11, 2014

Dezurtblue :

ko888 :

Dezurtblue :

No, I am not Norwegian nor do I speak the language.

For a system using two Radeon AMD Reference Design R9 290X graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 1000 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 68 Amps or greater and have at least two 6-pin and two 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor. Most of the components in a modern desktop computer draw the majority of their power from the +12V rail(s).

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted. Overclocking of a single Reference Design Radeon R9 290X 4GB GDDR5 from 1000MHz GPU and 1250MHz GDDR memory to 1100MHz GPU and 1550MHz GDDR memory has shown an extra 100 Watt increase in power draw (i.e. measured for the graphics card only) from one review I've read. For two cards you should allow for an extra 195 Watts for overclocking of the two graphics cards.

To be safe I would recommend the XFX ProSeries Black Edition 1050W (P1-1050-BEFX) since it has some spare capacity to handle that magnitude of overclocking.

Thank you this help me out a lot

and is the amps important to watch when you buy a psu?

The maximum combined +12V Amps is the most important specification when buying a PSU.

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