ASUS GTX 780 STRIX (2of them) is 850W enough?

Alain Joshua Camasura · Sep 11, 2014

Hey I am planning to upgrade my pc with a new motherboard,cpu,ram + 2 GFX cards and I was wondering if an XFX Pro 850W Bronze enough for twin GTX 780 strix from asus?

here is the whole upgrade list:

Asus Rampage V Extreme, Socket-2011-3
Intel Core i7-5820K
Corsair Vengeance DDR4 2800MHz 16GB(4gbx8modules)
ASUS GeForce STRIX GTX 780 6GB PhysX(2 of them)

i really need to know if i need to use more cash on the PSU or just use the money for a 1440p Monitor

tnx so much

sammy sung · Sep 11, 2014

750watt if you don't want to overclock.

850~1000watt if you want to O.C. Simple

dovah-chan · Sep 11, 2014

The XFX Pro series is a tier two class A psu series so you should be good

okcnaline · Sep 11, 2014

No, 2x 780 takes enough wattage without an i3. Get like a Corsair AX1200i.

sammy sung · Sep 11, 2014

A decent 750watt is enough for GTX 780 SLI!.

A single GTX 780 use 250 watts under load (not over clocked).
2 way sli GTX = ~500watt

The rest of the system will require about 150~200 watt.

dovah-chan · Sep 11, 2014

okcnaline :

A 780 SLI isn't exactly an R9 290X crossfire you know. Kind of overkill in my opinion. The AX1200i was really built with quad or 4-way SLI in mind.

Alain Joshua Camasura · Sep 11, 2014

dovah-chan :

do you have an idea how much power it would take if I OC the 5820k to around 4.5 ghz?

dovah-chan · Sep 11, 2014

Well my i5 4670K is around 1.24V at 4GHz. If I remember the 5820K's TPD is only around 140W so it's not that high, at least compared to something like an FX 9590. The 140W figure represents the maximum amount of power it can draw under full load, but it takes a very heavy load in order to actually pull a CPU up to it's full power potential. So I would say your core voltage would be around 1.34~ish so not that high. Your PSU should be able to take it.

I would be careful using the Asus OC socket though, as if you enable it in the BIOS, it will void your warranty with Intel on your CPU. (even though CPUs rarely die unless you bend a lot of pins and can't bend them back or you drop it and the die cracks)

Alain Joshua Camasura · Sep 11, 2014

dovah-chan :

Bend a lot of pins? the pins on intel Sockets are on the motherboard... anyways thank you very much!

dovah-chan · Sep 11, 2014

Oh woops should have been more clear. I did mean the CPU but I was referring to AMD CPUs which do have pins on them still. It's no problem ^^'

Alain Joshua Camasura · Sep 11, 2014

dovah-chan :

Ok

one last thing, so If I OC my Processor (5820k) it will havea voided warranty..?

dovah-chan · Sep 11, 2014

Your answers lie in the article here. But if you don't feel like reading about the Asus OC socket or warranty issues, if you do overclock your CPU then your warranty is void. It shouldn't be much of a problem anyway.

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ASUS GTX 780 STRIX (2of them) is 850W enough?

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