Corsair RM 850w PSU - enough for 2 980ti's plus 5820k?

[dmoney1980]

As the thread title states, I have 2nd 980ti on the way and currently have a Corsair RM 850w power supply - this exact model http://www.corsair.com/en-us/rm-series-rm850-80-plus-gold-certified-power-supply

Will this be enough to run 2 980ti's to go along with a 5820k at a mild OC of 4 ghz? I also have 1 SSD, 1 5400 rpm HDD, along with a total of 5 Noctua CPU heatsink and case fans?

Looking for input / feedback from owners on this PSU holding up with this system - thanks!

I've done some research and it's all over the place as far as what people are recommending. Here are some stats I collected:

 

[UsandThem]

That will be plenty. Those charts are absolute worst case scenarios (aka benchmarks that are designed to push your system).

The 980ti pulls 250w each, your CPU can pull up to 140w, and fans, a SSD, and a hard drive are hardly anything unless your fans are Deltas or Noctua Industrials. So that is 640w for your cards and CPU max.

Your PSU is a quality unit, and you should be fine. If for some strange reason it isn't, your system will not be stable when you game or run benchmarks, and you could simply buy a bigger unit. Also, if you have a smart UPS battery back-up or a kill-a-watt, you can see what you pull power wise.

I have to ask though, did you get a killer deal on the 980ti cards? Just curious why those over GTX 1070?

EDIT

Now that I thought about it though, the 850w unit only has 3 PCIe cables, whereas the 1000w version has 4 of them. So that is going to be your issue right there, as some of the 980ti cards are 2 x 8 pin each, and some are 8 + 6 pin each.

 

[2is]

You'll be fine. There are adapters if you don't have all the connectors necessary from the PSU, and they work just fine.

 

[dmoney1980]

Thanks everyone! The comment about the 3 connectors - I check Corsair's site and it states that it technically support 6 PCI-E connectors since each cable / connection has 2.

 

[UsandThem]

Thanks everyone! The comment about the 3 connectors - I check Corsair's site and it states that it technically support 6 PCI-E connectors since each cable / connection has 2.

Yeah, you are right. It was late when I typed that and my brain wasn't in 'math mode'. For some reason, and even though I know each PCIe connector has 2 x 8 pin on it, I was just......way out in left field.