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PSU requirements for 1080 SLI upgrade

post #1 of 24
Thread Starter 
By end of year I'm planning to upgrade my gaming rig to 2 1080 in SLI. According to a PSU calc it thinks my system only will use 686 W of power at load, and my current PSU is a Corsair TX750. My question is should I look at getting a 850 or higher wattage PSU or will my current 750 be enough?

I used this 1080 for reference.

eXtreme PSU Calculator component list

Motherboard: Desktop
Socket: Socket LGA 1150
CPU: 1 x Intel Core i7-4770
CPU Speed: 3400MHz
CPU Vcore: 1.25V
CPU Utilization: 90%
Memory: 2 x 8GB DDR3 Module
Video Card Set 1: 2 x NVIDIA GeForce GTX 1080
Core Clock: 1752MHz
Overvoltage: 1%
Memory Clock: 2645MHz
SLI / CF: Yes
Storage: 2 x SSD
Storage: 2 x SATA 7.2K RPM
Optical Drive: 1 x DVD-RW/DVD+RW Drive
Keyboard: 1 x Gaming Keyboard
Mouse: 1 x Gaming Mouse
Fan: 3 x 200mm
Fan: 1 x 140mm
Computer Utilization: 16 hours per day
Load Wattage: 636W
Recommended Wattage: 686W
Amperage: +3.3V: 12.6A, +5V: 12.5A, +12V: 48.4A
Recommended UPS Rating: 1200VA
Generated by eXtreme PSU Calculator 2016-07-08 02:32:40
post #2 of 24
With that processor and a regular overclocked GTX1080, you'd hardly exceed 500W. A good 550W should be good. I'd grab this for the price as this is the best that you can get for the price and should be better for your SLI. I would get a higher wattage one once you start flashing custom bios's and volt mods.
Edited by huzzug - 7/8/16 at 11:46am
post #3 of 24
Thread Starter 
Quote:
Originally Posted by huzzug View Post

With that processor and a regular overclocked GTX1080, you'd hardly exceed 500W. A good 550W should be good. I'd grab this for the price as this is the best that you can get for the price and should be better for your SLI. I would get a higher wattage one once you start flashing custom bios's and volt mods.

Just wondering, why would I get a lower wattage PSU? I already have the Corsair TX750 in my rig now, I'm just wondering if it will do the job.

PS, for some reason your URL embed didn't work. Doesn't even show up in the source of the forum page, but the URL tag in BB code shows up when I quote you...weird?
post #4 of 24

750 is perfect amigo : )

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post #5 of 24
Is it this one you have?
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=73

If it is that Corsair TX you have is its old and not very good so yes you should replace it
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post #6 of 24
Quote:
Originally Posted by herkalurk View Post


Just wondering, why would I get a lower wattage PSU? I already have the Corsair TX750 in my rig now, I'm just wondering if it will do the job.

PS, for some reason your URL embed didn't work. Doesn't even show up in the source of the forum page, but the URL tag in BB code shows up when I quote you...weird?

 

On paper, a good quality-made 750W is more than enough, however I would expect problems with that PSU for such a modern system. For some reason, the TX series often doesn't play well with such modern systems, and I still don't know why.

 

Oh, and please don't use any PSU calculator. Even eXtreme Outer Vision's is useless now. It was reasonable accurate up until August 1st 2015 when they decided to update it to what they have now. This new version is extremely inaccurate and is almost always overcalculating by 200-400W.

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It's a computer!
(18 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) Toshiba P300 3TB (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #7 of 24
Since you have too much money on your hands you should sponsor the people of PRC and buy a new PSU.
post #8 of 24
Thread Starter 
Quote:
Originally Posted by shilka View Post

Is it this one you have?
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=73

If it is that Corsair TX you have is its old and not very good so yes you should replace it

It's close.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

Purchased at the beginning of 2011 according to my newegg account. I'm not heartbroken if I need to invest in a new one, but this one hasn't caused any issues, even when I ran 2 460's in SLI.
post #9 of 24
Thread Starter 
Quote:
Originally Posted by JackCY View Post

Since you have too much money on your hands you should sponsor the people of PRC and buy a new PSU.

I don't have too much money, I'm selling my house and we're moving to an apartment, so I'll retain a lot of money from that. My wife is buying a few things and I'm upgrading my computer. I'm also getting a new 2560x1440 144 Hz monitor to go with it.
post #10 of 24
Quote:
Originally Posted by herkalurk View Post


It's close.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

Purchased at the beginning of 2011 according to my newegg account. I'm not heartbroken if I need to invest in a new one, but this one hasn't caused any issues, even when I ran 2 460's in SLI.

 

Yeah, but for some reason the TX series (usually the TX750) doesn't like these modern systems like you're planning to build. I'd replace it.

It's a computer!
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) Toshiba P300 3TB (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
AudioAudio
X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(18 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) Toshiba P300 3TB (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
AudioAudio
X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
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