PSU Questions

[Sarge9272]

Hey everyone, I need help finding a good PSU for a computer I am building. This is gonna be a computer with a full EKWB custom loop with 3 radiators and a total of 10 corsair fans. Now its still not certain whether or not it will be dual 1080's in SLI or just a single but overclocking will be a major thing for this computer.

 

Here are some of the PSU's ive been looking at:

 

Corsair AXi 860

http://www.newegg.com/Product/Product.aspx?item=N82E16817139041

 

Corsair AXi 1200

http://www.newegg.com/Product/Product.aspx?item=N82E16817139039

 

EVGA T2 850

http://www.newegg.com/Product/Product.aspx?item=N82E16817438064

 

EVGA T2 1000

http://www.newegg.com/Product/Product.aspx?item=N82E16817438065 

 

Would a 850/860 be enough for a dual GTX 1080 SLI setup with overclocking for CPU, GPUs, Ram..etc?

Now total power consumption im thinking the rig will be anywhere 500/600 watts which even a 750 watts would be fine right? 

However if you want the best efficiency dont you want to draw about half the total wattage? So a 1000/1200 watt would be most efficient?

Also just wondering EVGA PSUs vs Corsair PSUs which is better? Platinum vs Titanium?

Oh also for a off topic question (Custom GPU's or Founders Edition for liquid cooling?)

 

Specs
CPU: Core i7-6700k
GPU: Asus Geforce GTX 1080 Strix
MOBO: Asus Z170 Deluxe
RAM: Corsair Platinum 4x8GB
SSD: Samsung 950 Pro M.2 256gb

HD: Western Digital 2TB Black x2
Case: Cooler Master Cosmos 2

Fans: Corsair SP120 White LED x7, Corsair ML140 White LED x2, Corsai ML120 White LED x1

Pump: EK-XRES 140 DCC Pump/Res Combo

 

Anyway any help would be great!

[alexhelvetica]

850W is more than enough.

Titanium efficiency is better but isn't worth the extra money over Platinum or even Gold, it costs a lot more for close to no power savings.

Higher Wattage PSUs will also be more efficient, but it isn't worth the more money you spend on it.

[STRMfrmXMN]

I'd get an EVGA 850G2 and call it done TBH, you're wasting a lot of money doing this the way you are with crazy efficiency

[Sarge9272]

Ok so 850 that's what i originally thought. Now currently on Newegg Corsair 860AXi and EVGA 850T2 are both priced at $200, while Corsair 850RMx and EVGA 850G2 are $120. So basically the extra $80 is not worth going from Gold to Titanium/Plat.

[Aumuvo]

Are high voltage PSU safe for pc? ( Despite that it is inefficient) 

[alexhelvetica]

3 hours ago, Aumuvo said:

Are high voltage PSU safe for pc? ( Despite that it is inefficient) 

High voltage?

 

If you are in north america, you need a PSU that converts 120V AC to 3.3V DC, 5V DC and 12V DC PSU, if you are in Europe, you will need a 230V AC to 3.3V DC, 5V DC and 12V DC.

 

If you use a 230V PSU in a 120V country you could blow up the unit and/or your PC, also note a good modern PSU will be compatible with 100V to 250V AC.

 

If you meant Watts, watts is different to volts.

P=VI, (P=Watts, V=Volts, I=Amperes)

Lets do some napkin math.

 

P=550W

V=230V

I=?

550=230I

550/230 = I = 2.4A

 

No, a high wattage PSU is not going to damage your computer.

 

But if a PSU that expects a different input of voltage or outputs the wrong voltage for the device, it will fuck stuff up.

 

[Herman Mcpootis]

2 minutes ago, Comic_Sans_MS said:

If you use a 230V PSU in a 120V country you could blow up the unit and/or your PC, also note a good modern PSU will be compatible with 100V to 250V AC.

pretty sure its the other way around(120v psu in 230v country, tested this myself ), i think the 230v psu just doesn't work in a 120v country.