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PSU requirements for 1080 SLI upgrade - Page 2

post #11 of 24

Whoa, they made a change to their calculator and it looks to me like we can make it reasonably accurate again. Gimme a minute to explain.

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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
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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 #12 of 24
Ok, so do you see the part that says "Computer Utilization"? You chose "16 hours per day". It looks to me like this is telling the calculator that your entire system will be under 100% load for 16 hours per day. If that were true, then YES, I would definitely recommend a 750W+ PSU so that your average power consumption is closer to the sweet spot of the PSU.

However, look at the "1 hour per day" option:

Edited out for inaccurate calculator result. Something went wrong.
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) 3 TB Toshiba P300 (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) 3 TB Toshiba P300 (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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post #13 of 24
Thread Starter 
Well it just says 'computer utilization' not 'time you'll be using at full load'

I work at home, so my computer runs from 9 am to midnight most days.
post #14 of 24
Quote:
Originally Posted by herkalurk View Post

Well it just says 'computer utilization' not 'time you'll be using at full load'

I work at home, so my computer runs from 9 am to midnight most days.

But what's it doing that whole time? How much of that time is it just idling and how much of it is the entire computer being maxed out? When you're working, what are you really doing? Think about how demanding your tasks are (I'd doubt they're any more demanding than a typical YouTube video).

Also, hover your mouse over "Computer Utilization". You'll see this:

"Computer Utilization is directly related to PSU's components aging. When used heavily and over an extended period of time (1+ years), the power supply will slowly lose some of its initial wattage capacity, so plan accordingly!"

To translate this, each option from that list means "the entire computer is under full load for this much time each day". I really doubt your computer is maxed out for 16 hours per day. If it is, then ok it is, but I would bet it's not.

So let's look at the "1 Hour Per Day" results:

http://outervision.com/b/mfK7bh

XOV PSU Calculator part list

Motherboard: Desktop
Socket: Socket LGA 1150
CPU: 1 x Intel Core i7-4770
CPU Speed: 3400MHz
CPU Vcore: 1.2V
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: 1 hour per day
Load Wattage: 599W
Recommended Wattage: 649W
Amperage: +3.3V: 12.1A, +5V: 12.0A, +12V: 45.8A
Recommended UPS Rating: 1100VA
Generated by eXtreme PSU Calculator 2016-07-08 03:22:17.0

Do you see the 649W "Recommended PSU Wattage"? (it says "Recommended PSU Wattage" on the page) That's calculated by adding all of the Amperage values together, which is basically like saying, "We're assuming that your entire computer is under full load here, maxing out the 3.3V, 5V and 12V rails simultaneously. All 3 of the Amperages together here comes to 649.53W. I am recommending a 650W PSU and I am saying that it would be plenty. Interesting.

So this "Computer Utilzation" means, the entire computer (every last thing on this list) will be at 100% utilization for that entire duration, whether it's 1 hour or 24 hours per day. 1 hour is plenty to find out how much power you need. I mean, when you're talking about a high-quality PSU, you don't have to worry about that statement about the PSU's components aging or the gradual reduction in the PSU's output capacity, etc. All you have to worry about is how much power you need, and again, a good quality-made 650W PSU would easily be enough for this - especially while gaming.

How many hours per day are you putting the computer under very heavy loads (such as playing the most modern and most demanding video games)? A few hours? At most, your power consumption while gaming will top out at around 550W, while averaging just a little lower than that, likely riding 475-525W. This calculator's results claims the "Load Wattage" will be at 599W, but that's adding everything together at full load, which is unrealistic and pretty much never happens. I mean, it includes everything that's being powered by the PSU.

So, I think I might go back to liking this PSU calculator because the "1 Hour Per Day" option isn't all that bad. After all, we here at Overclock.net use and recommend high-quality PSUs. We don't mess around with cheap stuff that can wear out with component aging and gradual loss in output capacity over time from heavy use. Like I said, I'm recommending a 650W PSU, and this calculator is recommending a 650W PSU (649W) as well. I'm still suspicious though because of how it arrived at that 649W, so this could be a happy coincidence... Still, I'm almost impressed, especially compared to the state this calculator was in when it launched on August 1st 2015.
Edited by TwoCables - 7/8/16 at 12:57pm
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) 3 TB Toshiba P300 (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
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) 3 TB Toshiba P300 (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
post #15 of 24
Thread Starter 
I know I'm not at 100% most of the day. I work remotely currently through a virtual desktop on the customers site. I play games on the side, but nothing too high on the gpu use (factorio or prison architect). Maybe watch tv or a video while working on my other screen. I'd say my average per day is using 5-15% of cpu at all times with the programs running, not sure on GPU but most of the stuff I do isn't very intensive. I'll probably just look to get a new 750 just because. It's nice to future proof and since it said my load wattage was projected to be at 600 with only 50W wiggle room it's a bit tight. Not to mention it's not too expensive to get a 750 or a 650.

I've had really good results with corsair PSU. I'm currently using 4 in my house including the 1 in this computer. (HTPC and 2 servers have CX430M). I'm thinking the HX750i modular will do the trick, unless anyone can see a problem with that?
post #16 of 24
80 plus has nothing to do with quality if you are not already aware, a platinum rated unit does not mean it better then a lower rated unit and you can even get crap that is platinum rated

Dont get an HXi when there are options that are better and cost less
Corsair RMi and RMx series explained

The EVGA SuperNova G2/P2 are better and cheaper then the HXi as well

Corsair RMi same price as the HXi but better
Corsair RMx $30 cheaper and $50 cheaper with rebate and better then the HXi as well
EVGA SuperNova G2 $40 cheaper and $60 cheaper with rebate and again better then the HXi
EVGA SuperNova P2 $20 cheaper and $40 cheaper with rebate and yet again better then the HXi.

Your cheapest option is the EVGA SuperNova G2
http://www.newegg.com/Product/Product.aspx?Item=9SIA1N83U90889&cm_re=EVGA_750_watt-_-17-438-017-_-Product
Edited by shilka - 7/8/16 at 1:24pm
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Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
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Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
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LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
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Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
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Onkyo TX NR646  Dali Opticon Vokal x2 Dali Opticon 2 x2 Dali Opticon 1 
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Seravee
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CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Dali Opticon Vokal x2 Dali Opticon 2 x2 Dali Opticon 1 
AudioOtherOther
Dali E12 F Subwoofer CableMod E series PSU cable set CableMod LED Strips 
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post #17 of 24
Thread Starter 
If the RM units are better why did anandtech say the parts used were lesser quality?
Quote:
In terms of quality, the HX750i does not disappoint at all. Essentially, the HX750i appears to be a "reinforced" version of the RM series high output units. Both units are based on the same platform and make use of the same cooling fan, but the components used to create the HX750i are of excellent quality – not that the RM series' components are bad, but moving to all-Japanese electrolytic capacitors tends to be reassuring for users. CWT does an excellent job on the assembly of the unit as well, as we cannot find any significant soldering or mechanical cohesion flaws. Corsair covers the HXi units with a seven-year warranty.

http://www.anandtech.com/show/8835/corsair-hx750i-power-supply-review/5
post #18 of 24

No, 599W is unrealistically high as I said. Your power consumption while gaming will ride 475-525W, and it might peak at 550W if you're playing an extremely demanding super-modern game.

 

A high-quality 650W PSU would be plenty and it could save you some money on a PSU purchase.

 

The HX750i is overpriced. Check out the RM650x. It's superior in quality, it still has plenty of power for your rig, and it's only $70 after a rebate ($100 before the rebate):

 

http://pcpartpicker.com/product/Rp8H99/corsair-power-supply-cp9020091na

 

The RMx series is just a hair better than the SuperNOVA G2/P2/T2 series, and that series is very top-of-the-line already. Except, the 650W P2 and G2 are priced a lot higher right now, so I won't even show them to you.

 

Or if you insist on a 750W PSU, then check out the B2 for $70 after a rebate, and $90 before it:

 

http://pcpartpicker.com/product/JYyFf7/evga-power-supply-110b20750vr

 

Check out the glowing review: http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=393

 

Or, there's the 750W G2 for $95.98 after a rebate and $109.99 before it: http://pcpartpicker.com/product/MfJwrH/evga-power-supply-220g20750xr

 

Or if you insist on the best of the best (as though the G2 isn't.. lol), then there's the RM750x for $99.99 after a rebate, and $119.99 before it: http://pcpartpicker.com/product/9q38TW/corsair-power-supply-cp9020092na

 

So, even buying the most expensive PSU I'm recommending here would still cost you a lot less. Brand loyalty isn't always reliable (or wise).


Edited by TwoCables - 7/8/16 at 1:30pm
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) 3 TB Toshiba P300 (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
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) 3 TB Toshiba P300 (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
post #19 of 24
Quote:
Originally Posted by herkalurk View Post

If the RM units are better why did anandtech say the parts used were lesser quality?
http://www.anandtech.com/show/8835/corsair-hx750i-power-supply-review/5

 

RMx, not RM. The RMx series is very different from the RM series. The RMx beats out the G2/P2/T2 series, but just by a tiny bit. So, only go for it when it's priced lower.


Edited by TwoCables - 7/8/16 at 1:35pm
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) 3 TB Toshiba P300 (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
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) 3 TB Toshiba P300 (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
post #20 of 24
Thread Starter 
The price isn't a huge deal for me. A $10 difference won't break the bank. I'm also not buying it until I sell my house and move to the apartment, which won't be for at least 3 more months, so the rebate periods may be out by then. Regardless the RM650x looks good for what I need. It comes with enough cables based on the reviews and the lengths should be more than enough to reach the motherboard in my HAF 932.
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