650w enough for Dual 1080s?

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oggyphillips

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Feb 15, 2015
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I was looking online, for 1080 SLI PSU requirements, and most were saying to get a 700w or higher PSU.

When I was watching a video from Linus Tech Tips about PSUs, their test bench, consisting a 6850k and 2 1080s on heavy load only drew 437 watts.

So an EVGA G3 650 watt 80+ Gold, should be fine with a Ryzen 1600 6/12 OC and 1080 SLI?

LTT video 50 seconds in: https://youtu.be/LFx26E_DBUY?t=50s
 
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JackNaylorPE
Not according to nVidia, not even for the reference card:

https://www.nvidia.com/en-us/geforce/products/10series/geforce-gtx-1080/

Thermal and Power Specs:
94 = Maximum GPU Temperature (in C)
180 W = Graphics Card Power (W)
500 W = Recommended System Power (W)4
8-Pin = Supplementary Power Connectors
Click to expand...

500 for the system + 1st card and 180 for the 2nd = 680 watts

The typical AIB card 1080 will draw more than that ... here's the MSI pulling 234 under peak gaming ....

power_peak.png


And here we see the power limit can be raised by 17% om the MSI model

http://www.guru3d.com/articles_pages/msi_geforce_gtx_1080_gaming_x_8g_review,38.html

So 234 x...
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JackNaylorPE

JackNaylorPE

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Not according to nVidia, not even for the reference card:

https://www.nvidia.com/en-us/geforce/products/10series/geforce-gtx-1080/

Thermal and Power Specs:
94 = Maximum GPU Temperature (in C)
180 W = Graphics Card Power (W)
500 W = Recommended System Power (W)4
8-Pin = Supplementary Power Connectors
Click to expand...

500 for the system + 1st card and 180 for the 2nd = 680 watts

The typical AIB card 1080 will draw more than that ... here's the MSI pulling 234 under peak gaming ....

power_peak.png


And here we see the power limit can be raised by 17% om the MSI model

http://www.guru3d.com/articles_pages/msi_geforce_gtx_1080_gaming_x_8g_review,38.html

So 234 x 1.17 if ya overclocking = 273 watts ... safe to assume that any AIB card would be close but the EVGA only has 225 watts rating due to the single 8 pin connector ... that's 45 watts per card more than the reference card

Guru3D recommends 800 watts for the MSI 1080 ... 750 for the EVGA 1080 FTW ... if ya don't overclock anything

http://www.guru3d.com/articles_pages/msi_geforce_gtx_1080_gaming_x_8g_review,8.html
http://www.guru3d.com/articles_pages/evga_geforce_gtx_1080_ftw2_review,8.html

 
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