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Conflicting Wattage Requirements so asking the experts here:)

post #1 of 20
Thread Starter 
Hello,

I am in the process of acquiring components for a new build and would appreciate help figuring out how much wattage is enough without being overkill. The online calculators are all over the place, so after further research I ended up here. I am down to the EVGA G2, P2, PS??? or Seasonic series and have no issue spending for a quality PSU; what I do not want is spending needlessly for power I will never come close to touching. Room to grow is great, severely overkill is what I want to avoid.

Below is the build that I am working from as a maximum wattage need :

5820k OC to 4.4Ghz-4.5Ghz
16GB Ram 2666 (doubtful, but may up to 32GB if rendering needs increase)
GTX 980ti Hydro Copper SLI (may just be single, but would like PSU to handle SLI if get money--will overclock)
3 SSD (Samsung 850 2.5")
1 HDD (7200rpm)
1 Phanteks PH-F140SP fan
5 Phanteks PH-F120MP fans (may up to 10 max depending on adding push/pull)
Single Swiftech MCP655-B pump
SilverSton​e Technolo​gy All Bla​ck 1-to-8 ​PWM Fan Hu​b
Blu-Ray Reader

Additonal possibles addons:

LED light strips or Dual Cold-Cathode
Sound Card (depends on how good onboard sounds; been used to x-fi titanium)

I had settled on 1000w just for a little more room, but some calculators showed 1200w PSU needed (and yes, I read through some threads and now know they are useless). Thank you for any help and/or recommendations.
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5930k MSI x99a SLI Krait EVGA GTX 980Ti 16 GB Kingston HyperX Savage DDR4 2400Mhz 
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Samsung 850 Pro SSD Samsung 850 EVO SSD Samsung 850 EVO Custom Watercooling CPU/GPU 
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Windows 10 AOC u3477pqu 34" 3440x1440 Modified Phanteks Enthoo Pro M 
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post #2 of 20
Quote:
Originally Posted by Kurrgen View Post

Hello,

I am in the process of acquiring components for a new build and would appreciate help figuring out how much wattage is enough without being overkill. The online calculators are all over the place, so after further research I ended up here. I am down to the EVGA G2, P2, PS??? or Seasonic series and have no issue spending for a quality PSU; what I do not want is spending needlessly for power I will never come close to touching. Room to grow is great, severely overkill is what I want to avoid.

Below is the build that I am working from as a maximum wattage need :

5820k OC to 4.4Ghz-4.5Ghz
16GB Ram 2666 (doubtful, but may up to 32GB if rendering needs increase)
GTX 980ti Hydro Copper SLI (may just be single, but would like PSU to handle SLI if get money--will overclock)
3 SSD (Samsung 850 2.5")
1 HDD (7200rpm)
1 Phanteks PH-F140SP fan
5 Phanteks PH-F120MP fans (may up to 10 max depending on adding push/pull)
Single Swiftech MCP655-B pump
SilverSton​e Technolo​gy All Bla​ck 1-to-8 ​PWM Fan Hu​b
Blu-Ray Reader

Additonal possibles addons:

LED light strips or Dual Cold-Cathode
Sound Card (depends on how good onboard sounds; been used to x-fi titanium)

I had settled on 1000w just for a little more room, but some calculators showed 1200w PSU needed (and yes, I read through some threads and now know they are useless). Thank you for any help and/or recommendations.

 

Yeah, the internet doesn't have a good wattage calculator (estimator) right now. :/ We used to with eXtreme Outer Vision's, but not since they released their new one back in August.

 

Anyway, how high do you want to overclock the 980 Ti? (or both 980 Ti's if you ever get a second one)

It's a computer!
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It's a computer!
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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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #3 of 20
You're roughly right with the thousand watt. 980ti's can draw well in excess of 300w each at higher OC's. CPU will draw ~250w, maybe 325w. Pump and fan power draw will be low but non-negligable

You can make 850w work but not with everything at very high OC's. If you wanna go nuts with everything (two 980ti's with unlocked power limits and 1.225v+, highish OC on CPU) and not worry at all, you might want a 1200w unit instead of a 1000w unit.
Edited by Cyro999 - 10/17/15 at 10:13pm
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post #4 of 20
Thread Starter 
Hydros would not be pushed past 1500, probably less. Yet, figuring for 1500, would 1000w be sufficient or should I just go 1200w?
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CPUMotherboardGraphicsRAM
5930k MSI x99a SLI Krait EVGA GTX 980Ti 16 GB Kingston HyperX Savage DDR4 2400Mhz 
Hard DriveHard DriveHard DriveCooling
Samsung 850 Pro SSD Samsung 850 EVO SSD Samsung 850 EVO Custom Watercooling CPU/GPU 
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post #5 of 20
At moderate OC's (like 1.2v on two gpu's, 1.3 - 1.35vcore cpu) i think you're fine with 1000w

Most systems have way overkill PSU's but with systems like this, i think it's important to have a decent safety margin so that you don't ever have to say "hang on a sec, let me reduce my GPU OC so that i don't trip my PSU" and for that, i feel extremely confident for 1200w, not confident for 850w.

Maxwell uses twice as much power at high volts vs low, CPU difference can be even greater biggrin.gif
Edited by Cyro999 - 10/17/15 at 10:43pm
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MonitorKeyboardPowerCase
Asus PG258Q (240hz + Gsync) WASDKeyboards.com v1 semi custom w/ mx browns, ... Superflower Golden Green HX550 Air540 
MouseMouse Pad
Logitech G Pro Qck+ 
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post #6 of 20
Thread Starter 
Thank you for the help and information. I appreciate it. Narrows down the list and gives me something to think about...do I trust me to not suddenly go "oh, I can do a better OC than that."
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CPUMotherboardGraphicsRAM
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Windows 10 AOC u3477pqu 34" 3440x1440 Modified Phanteks Enthoo Pro M 
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Hard DriveCoolingOSMonitor
Samsung 850 EVO 1TB Custom Watercooling Windows 10 AOC U3477PQU 
KeyboardPowerCaseMouse
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Nevermore
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CPUMotherboardGraphicsRAM
5930k MSI x99a SLI Krait EVGA GTX 980Ti 16 GB Kingston HyperX Savage DDR4 2400Mhz 
Hard DriveHard DriveHard DriveCooling
Samsung 850 Pro SSD Samsung 850 EVO SSD Samsung 850 EVO Custom Watercooling CPU/GPU 
OSMonitorCase
Windows 10 AOC u3477pqu 34" 3440x1440 Modified Phanteks Enthoo Pro M 
CPUMotherboardGraphicsRAM
i7-5930k MSI X99A SLI Krait EVGA GTX 980Ti Kingston Hyperfury X 16GB 
Hard DriveCoolingOSMonitor
Samsung 850 EVO 1TB Custom Watercooling Windows 10 AOC U3477PQU 
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post #7 of 20
Quote:
Originally Posted by Kurrgen View Post

Thank you for the help and information. I appreciate it. Narrows down the list and gives me something to think about...do I trust me to not suddenly go "oh, I can do a better OC than that."

 

Exactly. Once I began overclocking, I was like, "Well now I want more". Then when I overclocked higher, I again was like, "Well now I want more!" lol

 

So with the overclocking potential you will have with this system and with the possibility of having two of these 980 Ti's in SLI, I would say that a high-end 1200W PSU would be the minimum. Just in case, the 80+ Certification isn't a reliable indicator of quality. I would be honored to help you select a PSU though.

It's a computer!
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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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #8 of 20
Thread Starter 
Ever since I got the itch way back when and initially started looking at parts, I saw the Seasonic 1200w SS-1200XP3 and thought it was gorgeous (I know, total geek thinking a PSU looks amazing too). However, I am open to other recommendations for a solid PSU.

My short list going with 1200w:

1. EVGA 120-G2-1300-XR (No 1200w G2)
2. SeaSonic Platinum-1200(SS-1200XP3)
3. SeaSonic X Series 1250W 80+ Gold
3. XFX P1-1250-BEFX (pretty sure based off one above, yet researching reviews showed abnormally high DOA ones...any thoughts?)
4. EVGA 220-P2-1200-X1

Opinions and recommendations, even if not on list above, are most welcome. Thank you again, everyone here has been very helpful.
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Nevermore
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Nevermore MkII
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CPUMotherboardGraphicsRAM
5930k MSI x99a SLI Krait EVGA GTX 980Ti 16 GB Kingston HyperX Savage DDR4 2400Mhz 
Hard DriveHard DriveHard DriveCooling
Samsung 850 Pro SSD Samsung 850 EVO SSD Samsung 850 EVO Custom Watercooling CPU/GPU 
OSMonitorCase
Windows 10 AOC u3477pqu 34" 3440x1440 Modified Phanteks Enthoo Pro M 
CPUMotherboardGraphicsRAM
i7-5930k MSI X99A SLI Krait EVGA GTX 980Ti Kingston Hyperfury X 16GB 
Hard DriveCoolingOSMonitor
Samsung 850 EVO 1TB Custom Watercooling Windows 10 AOC U3477PQU 
KeyboardPowerCaseMouse
Logitech G510 EVGA G3 850W DIYPC Silence-BK-Window Logitech G502 Proteus Core 
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Perixx DX-1000XXL Logitech Z506 Surround Sound Home Theater Speak... 
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post #9 of 20

The 1300W G2 can be a loud PSU because it doesn't have the ECO fan mode. :/ So, I'd say that this PSU can be avoided if a quieter computer is desired.

 

My pick would be either the 1200W SeaSonic Platinum or the 1200W EVGA P2, whichever ends up costing you less or whichever you find yourself attracted to more. We could probably add more PSUs to the list, but why make it more complicated? :)

 

So, I love that you're geeking out over a PSU. More people should be geeking out over PSUs just as much as they geek out over video cards and cases and CPUs and even memory and sound cards and monitors and keyboards and mice, etc. lol To me, every little part of a computer is special to me and worth geeking out over. Any part category can be a geek's candy store if you really get into the details of them - including things like optical drives. lol

It's a computer!
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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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
post #10 of 20
I have two 980 TI Hydro Coppers and a 5960x. I bought a 1200w P2. I can blow a 15 amp breaker anytime I want to by not turning off the big screen TV. I borrowed a meter and was pulling 1107w. I think the breaker is flaky and I'm going to get meter and get a second opinion.

I wish I had just bought the 1500w.

Just my experience... biggrin.gif
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