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Is 650w enough for 970 SLI and 4790k?

Zerolessmusic
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Is an EVGA superNOVA 650w enough for this build or will I need more?: http://pcpartpicker.com/user/zerolessmusic/saved/4MbxFT

 

These are the specs:

 

 PCPartPicker part list / Price breakdown by merchant

 
CPU Cooler: Corsair H90 94.0 CFM Liquid CPU Cooler  (Purchased For $90.00) 
Motherboard: Gigabyte GA-Z97X-UD3H-BK ATX LGA1150 Motherboard  ($149.99 @ NCIX US) 
Memory: PNY XLR8 16GB (2 x 8GB) DDR3-1600 Memory  (Purchased For $140.00) 
Video Card: Asus GeForce GTX 970 4GB STRIX Video Card (2-Way SLI)  (Purchased For $350.00) 
Video Card: Asus GeForce GTX 970 4GB STRIX Video Card (2-Way SLI)  ($334.99 @ NCIX US) 
Operating System: Microsoft Windows 8.1 (32/64-bit)  (Purchased For $105.00) 
Sound Card: Asus Xonar DG 24-bit 96 KHz Sound Card  (Purchased For $25.00) 
Case Fan: Cougar Vortex 70.5 CFM 140mm  Fan  ($14.99 @ NCIX US) 
Case Fan: Cougar Vortex 70.5 CFM 140mm  Fan  ($14.99 @ NCIX US) 
Case Fan: Cougar Vortex 70.5 CFM 140mm  Fan  ($14.99 @ NCIX US) 
Case Fan: Cougar Vortex 70.5 CFM 140mm  Fan  ($14.99 @ NCIX US) 
Case Fan: Corsair SP140 49.5 CFM 140mm  Fan  (Purchased For $16.00) 
Case Fan: Corsair SP140 49.5 CFM 140mm  Fan  (Purchased For $16.00) 
Case Fan: Corsair SP140 49.5 CFM 140mm  Fan  (Purchased For $16.00) 
Fan Controller: NZXT Sentry Mix 2 Fan Controller  ($29.99 @ Micro Center) 
Mouse: Corsair M65 RGB Wired Laser Mouse  (Purchased For $16.50) 
Other: WASD keyboard 104 w/ some red keycaps (Purchased For $155.00)
Other: PreSonus Mic, audio interface and cables bundle (Purchased For $215.00)
Other: Beyerdynamic DT 770 Pro (80 ohms) (Purchased For $175.00)
Other: WD passport 1 tb (Purchased For $70.00)
Other: HP Pavilion 23bw (Purchased For $0.00)
Other: Logitech c270 (Purchased For $0.00)
Other: PNY USB 3.0 32gb drive (Purchased For $24.00)
Other: Pop filter for mic. (Purchased For $20.00)
Other: ASUS vn247h-p (Purchased For $140.00)
Other: 7x Coboc T​X4EX-12 PM​W Fan cabl​e extensio​n ($14.00)
Other: 2x Silvers​tone FF141​ 140mm Fa​n Filter ($10.00)
Other: 140mm Fan grills black​ (2 in 1) ($5.00)
Other: Silverston​e CPF01 3.​94" PWM Fa​n Splitter​ Cable ($4.00)
Total: $2898.39
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-03-30 00:22 EDT-0400

Build Modulus

 
[x] Intel Core i7 3770 [x] PNY xlr8 16gb(2x8) 1600mhz [x] Asus Strix 970 [x] Corsair h90, 3x corsair sp140, 1x Corsair af120 [x] ASRock Z77 Extreme4 [x] NZXT S340 [x] EVGA superNOVA NEX 650w [x] Asus xonar DG,Beyerdynamic dt770 Pro (80ohms), PreSonus M7, PreSonus AudioBox [x] WASD keyboard 104 key(Mx Brown) [x] Corsair M65 RGB [x] WD Blue 1TB 7200 HDD, WD passport 1tb [x] Asus VN247H-P, BenQ 2420Z [x]

 

Cycling Gear

 [x] Giant Defy 5 [x] CamelBak Classic 2L [x] Nishiki Socorro [x] Giro Bravo Blue Jewel/Black [x] Midland Xtra-Talk w/ Headset (For Group Rides) [x] Casio G-Shock G100-1BV [x] Zefal Saddle Bag [x] Giant Control Mini MTB+ Frame Pump [x] Schwinn Expanding Cage [x] 2* Giant 700c*25c Tubes - Presta Valve [x] 2* Tire Levers [x] Stanley Allen Key Set [x] Mini-Lock For Saddle Bag [x]
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I don't know, I think you might be stretching it a bit. Might want an upgrade to 725 watt

CPU: i7 5820K @ 4.00GHz | Mobo: ASUS X99-DELUXE LGA 2011-v3 | RAM: Corsair LPX 64GB Quad-Channel DDR4 @ 2400MHz | GPU: GTX 970 x2 SLI | Storage: 250 GB AMD SSD x 4 Raid 0

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It will be tight, but you should be OK.  Most people go with at least 750 watts for SLI.  Keep in mind that over time the PSU efficiency and max power output does drop off.  If your PSU runs at 90% under load, after 3 to 5 years it might not be able to supply the needed power.

i7 4790k @4.7 | GTX 1070 Strix | Z97 Sabertooth | 32GB  DDR3 2400 mhz | Intel 750 SSD | Define R5 | Corsair K70 | Steel Series Rival | XB271, 1440p, IPS, 165hz | 5.1 Surround
PC Build

Desk Build

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If my 750w power supply was capable of powering my previous graphics cards (780 SLI) with a 4670K @ 4.5, then you should be ok.

Case: Corsair 4000D Airflow; Motherboard: MSI ZZ490 Gaming Edge; CPU: i7 10700K @ 5.1GHz; Cooler: Noctua NHD15S Chromax; RAM: Corsair LPX DDR4 32GB 3200MHz; Graphics Card: Asus RTX 3080 TUF; Power: EVGA SuperNova 750G2; Storage: 2 x Seagate Barracuda 1TB; Crucial M500 240GB & MX100 512GB; Keyboard: Logitech G710+; Mouse: Logitech G502; Headphones / Amp: HiFiMan Sundara / Mayflower Objective 2; Monitor: Asus VG27AQ

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For 970, it's ok. 2 970 with an i7 took around 500W, so 650W already have enough headroom for your system.

 

My rig: Intel Core i7 4790k | MSI Z97 PC Mate | GSKILL Ripjaws X 16GB 1866MHz | ADATA Premier SP550 480GB SSD | Seagate Barracuda 3TB | Seagate Barracuda 2TB  | MSI Gaming X GTX 1070 | Thermaltake Versa N21 | Corsair CX550M Semi Modular PSU | AOC G2460PF 144Hz | Logitech G502 | GSKILL Ripjaws KM780  | GAMDIAS HEPHAESTUS V2  PCPartPicker | Old Build Log | New Build Log

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