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HOw much power do I need?

W

wschow

n00b
Joined
Apr 30, 2015
Messages
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Hai, I am going to build my first pc soon. How much power do I need for i7-4790k and 2 MSI GTX 980 Ti SLI? Is something like Corsair AX860i enough or should i go for AX1200i. I had tried varies PSU calculator but none are giving me a consistent value.
 
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850W range should be plenty. I get away with a QUALITY 750W for my system in my sig, and the power draw of the 780 and 980ti are similar.

If I had to do it over again, I would have gone with an 850-1000W PSU.

Check out the Cooler Master V850 and V1000. If you can catch either on sale, it's usually a solid choice and a damn good deal.

I wouldn't get the AX-i series. You end up overpaying to get a feature you really don't need.
 
wschow said:
Hai, I am going to build my first pc soon. How much power do I need for i7-4790k and 2 MSI GTX 980 Ti SLI? Is something like Corsair AX860i enough or should i go for AX1200i. I had tried varies PSU calculator but none are giving me a consistent value.
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The 860i will be fine.

Stick with the corsair, do not waste your time with the Evga PSU.
 
EVGA G2 and GS PSUs are solid. -i PSUs are overpriced.
 
Tsumi said:
EVGA G2 and GS PSUs are solid. -i PSUs are overpriced.
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A high quality PSU is worth its weight in gold. I'd spend more on a proven workhouse with a industry best warranty, before I bought a PSU from eVga, just my .02.

And yes I have the Corsair AX850. Sure it was $300 new, but has a 7 year warranty, and at the time (3+ years ago) it was a outstanding PSU.
 
Rav3n said:
A high quality PSU is worth its weight in gold. I'd spend more on a proven workhouse with a industry best warranty, before I bought a PSU from eVga, just my .02.

And yes I have the Corsair AX850. Sure it was $300 new, but has a 7 year warranty, and at the time (3+ years ago) it was a outstanding PSU.
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No one is disputing the standard AX series. It's the "-i" versions that aren't worth the premium to 99% of enthusiasts.
 
DejaWiz said:
No one is disputing the standard AX series. It's the "-i" versions that aren't worth the premium to 99% of enthusiasts.
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Good point. And I misread the OP.

The evga would be well worth considering over the -i series sorry.

The only line I would buy from Corsair is the AX series, and most people will not spend the money for one.
 
DejaWiz said:
No one is disputing the standard AX series. It's the "-i" versions that aren't worth the premium to 99% of enthusiasts.
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What makes them priced so dam high? they made out of gold?
 
primetime said:
What makes them priced so dam high? they made out of gold?
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As an owner of the AX1500i I can tell that they have things which makes their price worth consideration. They have very high efficiency. They are fully digital and can be configured as virtual multirail that is they can be set to trip when there is problem on some line. They have USB connection via which one can configure them and track the paramenters. At typical loads of about 700 W the AX1500i fan is not activating yet and so it is practically silent. These power supplies are made of best components and will serve for life, you buy the power supply only once with them.

In general I think it if good to buy high-efficienncy overprovisioned power supply since it will not heat up much and will be silent. AX1200i would be good in this case.
 
wirk said:
As an owner of the AX1500i I can tell that they have things which makes their price worth consideration. They have very high efficiency. They are fully digital and can be configured as virtual multirail that is they can be set to trip when there is problem on some line. They have USB connection via which one can configure them and track the paramenters. At typical loads of about 700 W the AX1500i fan is not activating yet and so it is practically silent. These power supplies are made of best components and will serve for life, you buy the power supply only once with them.

In general I think it if good to buy high-efficienncy overprovisioned power supply since it will not heat up much and will be silent. AX1200i would be good in this case.
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What you think is happening and reality are sometimes two very different things.

A 1500 watt power supply that is 95% efficient at 850 watts is going to put out the same amount of heat as a 1000 watt PSU that is 95% efficient at 850 watts.

Capacitors will degrade over time. There is no such thing as a capacitor that lasts a lifetime. Other electrical components can and will degrade as well. Buying the best is not a way for preventing that from happening.

Buying a too large capacity power supply serves only one purpose: wasting money.
 
primetime said:
What makes them priced so dam high? they made out of gold?
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Eh, it's mostly the fiddly Corsair Link shit that its nearly pointless for 95% of people.

Look at the EVGA G2 and GS series PSUs, the G2s are Great Superflower based units and the GS are Equally Awesome Seasonic Units. You literally can't go wrong with either of them. They also have the best warranty, 10 years, and EVGA service is top notch. In the past I'd have said avoid EVGA (Supernova series was garbage), but the G2 and GS are just stellar PSUs.
 
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