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Hi, upgrading GPU to GTX 780. How much power will I need. i5 4670k, corsair vengeance 2x4gb, ASUS b85m-g

Tags:
  • Power
  • Intel i5
  • RAM
  • Gtx
  • MSI
  • Asus
Last response: in Components
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September 23, 2014 4:58:33 PM

How much power will I need?

More about : upgrading gpu gtx 780 power 4670k corsair vengeance 2x4gb asus b85m

September 23, 2014 5:13:43 PM

750W would be good, so you have room to overclock and add fans and light... Also I would reccommend getting a GTX 970 it uses less power and is bit better than the GTX 780
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a b Ĉ ASUS
September 23, 2014 5:34:27 PM

Why would you want a 780 when a 970 and 980 are faster? A good 550w PSU would work for either the 970 or 980.
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September 23, 2014 5:46:26 PM

Because the release of the 900 series, caused a massive price drop in the 780. On SCAN its around £225, (the price of a 770 about a week ago). However the 970 starts around £290ish.
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a c 115 Ĉ ASUS
September 23, 2014 6:07:36 PM

I use 850 watters on 780 builds to allow for adding a second card in SLI...... 600 watts works for a single card installation but there's no sense in getting anything less than 620-650 watts as price differences are tiny. However, twin 980s could prolly get by on a 750 watter since each card draws about 90 watts less.

http://www.geforce.com/hardware/desktop-gpus/geforce-gt...

Quote:
980 Thermal and Power Specs:
98 C = Maximum GPU Tempurature (in C)
165 W = Graphics Card Power (W)
500 W = Minimum System Power Requirement (W)
2x 6-pins = Supplementary Power Connectors


500 + 165 = 665 watts for SLI

http://www.geforce.com/hardware/desktop-gpus/geforce-gt...

Quote:
970 Thermal and Power Specs:
98 C = Maximum GPU Temperature (in C)
145 W = Graphics Card Power (W)
500 W = Minimum System Power Requirement (W)
2x 6-pins = Supplementary Power Connectors


500 + 145 = 645 watts for SLI

I'd use a 750 or 850 w/ overclocking

http://www.geforce.com/hardware/desktop-gpus/geforce-gt...

Quote:
780 Thermal and Power Specs:
95 CMaximum GPU Temperature (in C)
250 WGraphics Card Power (W)
600 WMinimum Recommended System Power (W)
One 8-pin and one 6-pinSupplementary Power Connectors


600 + 250 = 850 and that's enough .... I have two OC'd 26% and the system pulls 745 watts from the wall (670 watt output)

$50 750 watt PSU
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

$85 850 watt PSU
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The B2 isn't quite the unit the G2 and P2 are but at those prices hard to turn down.

tho as with the 780 question (why not a 980 ?) ... if you upgrading MoBo / CPU (wasn't clear if that's what ya had or that's what ya gettin) why not a 4690k or 4790k w/ Z97 ? I'm guessing that ya keeping the old MoBo / CPU but if you upgrading those consider that too.
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September 23, 2014 6:15:16 PM

Thanks for all that advise :)  the other specs listed are the ones I already have, along with a gtx 760. Which I hope to upgrade.
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