4790k and sli 980s?

[ThatOnePcGuy]

I want to get a second 980 and upgrade to intel, but I'm wondering if i have enough wattage to support it. I would like to try to overclock the CPU to 4.5 on a Kraken x61. I will not be overclocking my GPU's though. So what I'm asking is can I do what i want to do on my PSU? Or would i have to upgrade my PSU?

SPECS
MOBO: Asrock 990 fx Killer Fatal1ty

CPU: AMD 8350(4.5 ghz)
CPU Cooler: Hyper 212 evo

RAM: 1x8 Kingston Hyper X blu

GPU: EVGA 980 Sc/Acx

PSU: Corsair Rm750

HDD: 1tb WD Blue
SSD: Samsung Evo 120 gb

Case: Thermaltake Core V71

 

[JackNaylorPE]

http://www.guru3d.com/articles_pages/msi_geforce_gtx_980_gaming_oc_review,7.html

Here is Guru3D's power supply recommendation:

GeForce GTX 980 - On your average system the card requires you to have a 500 Watt power supply unit.
GeForce GTX 980 in 2-way SLI - On your average system the cards require you to have an 800 Watt power supply unit as minimum.

If you are going to overclock your GPU or processor, then we do recommend you purchase something with some more stamina.

http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-980/specifications

Thermal and Power Specs:
98 CMaximum GPU Tempurature (in C)
165 WGraphics Card Power (W)
500 WMinimum System Power Requirement (W)
2x 6-pinsSupplementary Power Connectors

So with reference cards, nVidia wants 500 + 165 = 665 watts

However, Guru measured the MSI 980 pulling 198 watts

So 198 - 165 = 33 watts under for each card

33 x 2 cards = 66 + 665 = 731

With a Corsair HX 750 or AX 760, I wouldn't worry at stock settings ..... but with an RM or CX, I definitely wouldn't overclock the CPU or GPUs..... not with those caps in the PSU.

 

[drkatz42]

I'd recommend a better quality psu and maybe a few more watts:
SeaSonic M12II 850
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151108

also, add another dimm of ram to take advantage of dual channel

 

[Dark Lord of Tech]

Best 850w on the market.

PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA 850W 80+ Gold Certified Fully-Modular ATX Power Supply ($119.99 @ NCIX US)
Total: $119.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-01-10 22:27 EST-0500

 

[JackNaylorPE]

I agree .... well almost .... with SR-71 ....

The EVGA G2 is one of the best units on the market with 10.0 performance / 9.5 Build Quality Rating (I ignore the functionality and value ratings as I like to decide that for myself and prices change) .... not quite a Seasonic X series or a Corsair AXi / Hxi which get 10.0 ratings in both build quality and performance, but the Corsair's are ridiculously priced (in a bad way). Meanwhile the EVGA G2 has also been ridiculously priced (in a good way) having been available mostly under $100....but even at today's $120 ... it sure makes a good argument to ignore that 0.5 difference when it's an extra $60-$70 to get better.