Do I really need a 1000w PSU?

Scotty Mac 1976

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Sep 10, 2013
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Ok. So after reading mixed statements and facts about PSUs I'm yet lost again lol. I did an updated calculator I found on the NZXT Facebook page and with everything I put in there it gave me a max of 670w. That's including 2x GTX 760 ti, oc CPU at 4.5ghz w/1.40v (139w) 2x SSD, 2 extra 250mm fans. Instead of the default 90% TDP, I put in 100%. Still recommended a 750w PSU. I also did my old rig too. With like a couple extra fans, and it said like 480w. Recommended a 650w PSU. So all in all.. What do I do? Do I believe the estimates of the calculator, or what? I keep seeing people say I won't need a 1000w PSU unless I'm running 3 video cards. And we're also talking about a huge difference in price too. Future proof is what I was going for with my newer build.. But not wasted wattage too.
I'm asking this because my old rig's PSU finally croaked on me. It was almost 8 years old, so was expected. I was thinking of putting my current 750w PSU in my old one, and getting a new one for my newer build. But so I just get the same 750w PSU, or just get a smaller one for my old rig?
 

Scotty Mac 1976

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Sep 10, 2013
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Sorry about that, my system is as follows:
i5 4670k (stock)
Msi z87 g45 mobo
Evga gtx 760 FTW 4gb
Samsung 120gb SSD
Western digital caviar blue 1tb
Using 2x sickle flow fans for my hyper 212 Evo.
Cooler master HAF 922 with an extra 200mm side panel fan
Asus DVD combo drive
I also added a 120mm fan to the bottom.

I am going SLI and overclocking the CPU.
Thanks all.
 

Scotty Mac 1976

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Sep 10, 2013
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I was thinking that too. Considering my PSU has a 10 year warranty.. I don't want to have to upgrade it if I get more powerful cards for SLI in the future.
 

heylandius

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Jun 17, 2013
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My old CPU lasted my around 10 years. MY PSU barely lasted 8 years
 

Scotty Mac 1976

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So obviously if I get higher end cards in the future, I'll need more power. That's where my main concern lies. And if I decided to go with water cooling, that obviously uses more power. I guess my decision is still up in the air.
 

heylandius

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Jun 17, 2013
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850WATT PSU should last you a long time..
 

Scotty Mac 1976

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I sure wish EVGA had some in between their 750 and 1000w models. Then my questions wouldn't have to be asked lol. I'm partial to their PSU's. Just simply cannot beat their 10 year warranty. Besides.. My 750 is very nice. Guess I'll have to search for other options then.