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Need a little advice on a new modular PSU

post #1 of 6
Thread Starter 
Title pretty much sums it up, I'm seeking some advice on purchasing a new modular PSU. There is nothing wrong with my current Corsair 750 gold other than not being fully modular really.

I currently have:

i7-3770k (Overclocked @1.48ghz with 1.42v)
Crossfire 7970's (Overclocked to 1125/1500mhz with not voltage adjustment, just the +20%power tune bar)
1 WD Black 1tb HDD
1 Samsung 830 SSD
1 Samsung DVDR Drive
2 x MCP35X Pumps
Lamptron FC6 Fan Controller (4x Gentle Typhoon AP15, 4x Corsair SP120, 2x Silverstone 92mm, 1x 80mm Unknown brand)

I plugged this into the calculator on this site and it said I need an 850w unit which kinda surprised me considering I am currently running it all on a 750w just fine. None the less, that got me thinking and I ordered a Kill a Watt to see what my total draw is. It seems at idle I am drawing between 90-130w from the wall. While gaming (Crysis 3, BF3, Starcraft2, Far Cry, etc) I am never topping 500w pulled from the wall. Finally, while trying to simulate a full load the most I can manage to get my system to draw is 580w from the wall. This was accomplished by manually turning all fans and pumps up, then running prime95 and Unigine Valley simultaneously.

After seeing that my draw never gets above 600w I am now reconsidering my purchase plans. My original intent was a Seasonic x760 Platinum, but now it seems I can save nearly a hundred bucks by purchasing the x660 Platinum. I had wanted a Golden Flower for their alleged silence but can't seem to find a full modular.

So am I correct in assuming a 660w unit will more than power my xfire 7970/ i7-3770k water cooled rig? And does anyone want to sway me towards a different psu than the ones I had suggested? Finally, am I just better off biting the bullet and ordering the x760 unit for more headroom?

Thanks everyone.
Eidolon
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CPUMotherboardGraphicsGraphics
i7-5820k Asus X99 Deluxe 3.1 EVGA 980 SC EVGA 980 SC 
RAMHard DriveCoolingOS
Geil DDR4 Samsung 850 EVO Custom Water Loop Windows 8.1 
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Dell Ultrasharp Curved 34inch Ducky Shine 2 EVGA 1000w P2 ATX Parvum 
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Eidolon
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i7-5820k Asus X99 Deluxe 3.1 EVGA 980 SC EVGA 980 SC 
RAMHard DriveCoolingOS
Geil DDR4 Samsung 850 EVO Custom Water Loop Windows 8.1 
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Dell Ultrasharp Curved 34inch Ducky Shine 2 EVGA 1000w P2 ATX Parvum 
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Mionix Naos 7000 Woo Audio WA7 
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post #2 of 6
A higher wattage would be more for overvolts on the graphics cards, significantly higher overclocks (also potentially something more stressful than prime95 and Unigine, though that wouldn't really be reached in a game). If you're not touching voltage, you're not increasing power consumption much over stock. Stock Ivy Bridge power consumption is so low that even running 1.42V isn't going to skyrocket that. Though quite arguably 1.42V might be high for long-term use if you're keeping the CPU for a few years. If you're not increasing voltage on the graphics cards, ~650W would be okay.

Where are you finding 660XP around $100 less than 760XP? Used? What would be the price on 660XP? Current-shipping Seasonic X are not much different than the Platinums, as they're using the same platform, mostly same internals, same fan, etc. Silverstone Strider Plus / Gold are fine too, but not quite as good.
post #3 of 6
Thread Starter 
The seasonic 660 platinum has popped up 3 times now at 90 bucks shipped on newegg. Cheapest I've seen the 760 is 180 so far.
Eidolon
(14 items)
 
  
CPUMotherboardGraphicsGraphics
i7-5820k Asus X99 Deluxe 3.1 EVGA 980 SC EVGA 980 SC 
RAMHard DriveCoolingOS
Geil DDR4 Samsung 850 EVO Custom Water Loop Windows 8.1 
MonitorKeyboardPowerCase
Dell Ultrasharp Curved 34inch Ducky Shine 2 EVGA 1000w P2 ATX Parvum 
MouseAudio
Mionix Naos 7000 Woo Audio WA7 
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Eidolon
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i7-5820k Asus X99 Deluxe 3.1 EVGA 980 SC EVGA 980 SC 
RAMHard DriveCoolingOS
Geil DDR4 Samsung 850 EVO Custom Water Loop Windows 8.1 
MonitorKeyboardPowerCase
Dell Ultrasharp Curved 34inch Ducky Shine 2 EVGA 1000w P2 ATX Parvum 
MouseAudio
Mionix Naos 7000 Woo Audio WA7 
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post #4 of 6
I have the 660 platinum which replaced an ocz zt 650 bronze. It is really quiet and especially on hybrid. It does have a coil whine that you cannot hear in a case. So it does have a flaw not sure if long term whether coil whine causes any damage or not. It powers my ocd 3570k and 680 with no problems and I dont think you'll have any either.
Fresh Phenom 007
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Fresh Phenom 007
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post #5 of 6
Which 750 are you using currently? The hx750 only has the 24 and 8 pin non modular which are in use. Im guessing for sleeving? You can always order a set of sleeved cables through corsair?
Nasty Girl
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Nasty Girl
(17 items)
 
  
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I5-760  Evga P55 FTW200 2 x Evga GTX 570 SC GSkill Eco 
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Gkill Phoenix Pro SSD Samsung Spinpoint F3 LG Super-multi BDROM Cooler Master V8 
CoolingOSMonitorKeyboard
3 Enermax Magmas + Scythe Kaze Master Controller Windows 7 Professional LG Flatron 2241 LED 22" Razer BWU 
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Corsair HX750 Antec Sonata Solo ||  Razer Deathadder Mionix Propus 360 
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Creative X-Fi Titanium 
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post #6 of 6
Thread Starter 
Hx750, and yes my main complaint is for sleeving which I'd be doing myself.
Eidolon
(14 items)
 
  
CPUMotherboardGraphicsGraphics
i7-5820k Asus X99 Deluxe 3.1 EVGA 980 SC EVGA 980 SC 
RAMHard DriveCoolingOS
Geil DDR4 Samsung 850 EVO Custom Water Loop Windows 8.1 
MonitorKeyboardPowerCase
Dell Ultrasharp Curved 34inch Ducky Shine 2 EVGA 1000w P2 ATX Parvum 
MouseAudio
Mionix Naos 7000 Woo Audio WA7 
  hide details  
Reply
Eidolon
(14 items)
 
  
CPUMotherboardGraphicsGraphics
i7-5820k Asus X99 Deluxe 3.1 EVGA 980 SC EVGA 980 SC 
RAMHard DriveCoolingOS
Geil DDR4 Samsung 850 EVO Custom Water Loop Windows 8.1 
MonitorKeyboardPowerCase
Dell Ultrasharp Curved 34inch Ducky Shine 2 EVGA 1000w P2 ATX Parvum 
MouseAudio
Mionix Naos 7000 Woo Audio WA7 
  hide details  
Reply
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