Choosing a power supply for gaming pc

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Tanner_92

Commendable
Jan 27, 2017
1
0
1,510
Im building my first gaming pc and im having trouble deciding on what wattage i need for the power supply. My build will consist of an i7 6700k, a gtx 1070, an asus rog maximus viii hero motherboard, a corsair h100 liquid cpu cooler, an ssd between 240-500gb, a 2 or 3 TB HDD, 16gb of ddr4 ram inside of an nzxt noctis 450 case. Ive been thinking 650w gold but i want to make sure it will be enough.
 
Solution
imsqam
You can use Outervision's PSU calculator to get you a "ballpark" number for system requirements. So with a stock "338W requirement" you have about another 300W for overclock. A pretty significant overclock results in a 512W requirement. So for small to moderate overclocks the 650W is fine, if you want to push the limits a 750W might be wise.

OuterVision PSU Calculator part list http://outervision.com/b/vjlukS

Motherboard: Desktop
CPU: 1 x Intel Core i7-6700K
CPU Speed: 4800MHz
CPU Vcore: 1.5V
CPU Utilization: 90%
Memory: 2 x 8GB DDR4 Module
Video Card Set 1: 1 x NVIDIA GeForce GTX 1070
Core Clock: 2050MHz
Overvoltage: 12%
Memory Clock: 2200MHz
Storage: 1 x SSD
Storage: 1 x SATA 7.2K RPM
Keyboard: 1 x Standard Keyboard
Mouse: 1 x...
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imsqam

imsqam

Splendid
Mar 25, 2011
1,912
1
23,960
You can use Outervision's PSU calculator to get you a "ballpark" number for system requirements. So with a stock "338W requirement" you have about another 300W for overclock. A pretty significant overclock results in a 512W requirement. So for small to moderate overclocks the 650W is fine, if you want to push the limits a 750W might be wise.

OuterVision PSU Calculator part list http://outervision.com/b/vjlukS

Motherboard: Desktop
CPU: 1 x Intel Core i7-6700K
CPU Speed: 4800MHz
CPU Vcore: 1.5V
CPU Utilization: 90%
Memory: 2 x 8GB DDR4 Module
Video Card Set 1: 1 x NVIDIA GeForce GTX 1070
Core Clock: 2050MHz
Overvoltage: 12%
Memory Clock: 2200MHz
Storage: 1 x SSD
Storage: 1 x SATA 7.2K RPM
Keyboard: 1 x Standard Keyboard
Mouse: 1 x Standard Mouse
Fan: 4 x 140mm
Liquid Cooling Kit: 1 x Corsair Hydro H100
Computer Utilization: 8 hours per day
Load Wattage: 512W
Recommended Wattage: 562W
Amperage: +3.3V: 10.2A, +5V: 8.4A, +12V: 40.5A
Recommended UPS Rating: 1000VA
Generated by OuterVision PSU Calculator 2017-01-28 09:16:23
 
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Solution
superninja12

superninja12

Glorious
May 18, 2015
11,378
56
49,140
hey tanner, dont use calculators they're extremely unreliable.

gold,platinum,bronze,titanic is ONLY about efficiency not about the build quality or voltage stability which matters the most !

these are some suggestions.

good:
PCPartPicker part list / Price breakdown by merchant

Power Supply: SeaSonic S12II 520W 80+ Bronze Certified ATX Power Supply ($47.89 @ B&H)
Total: $47.89
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-01-28 09:25 EST-0500

perfect
PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA SuperNOVA G2 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($77.89 @ OutletPC)
Total: $77.89
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-01-28 09:26 EST-0500

excellent:
PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA SuperNOVA G3 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($99.99 @ B&H)
Total: $99.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-01-28 09:27 EST-0500

I am dice and want the absolute best:
PCPartPicker part list / Price breakdown by merchant

Power Supply: SeaSonic PRIME 750W 80+ Titanium Certified Fully-Modular ATX Power Supply ($173.99 @ SuperBiiz)
Total: $173.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-01-28 09:27 EST-0500
 
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superninja12

superninja12

Glorious
May 18, 2015
11,378
56
49,140


there are a few things to keep in mind:

-> one 500w psu, isn't the same as the other 500w psu
-> future upgrades
-> the usage of the system(browsing isn't the same as 4k gaming with overclocking)
-> the environment the system is placed.

a rough good psu/gpu guide is this http://www.realhardtechx.com/index_archivos/Page362.htm
 
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imsqam

imsqam

Splendid
Mar 25, 2011
1,912
1
23,960
Yes, one 500W is not the same as the other. Load capabilities of a PSU depend on the system's ability to withstand transient spikes in the voltage pulls which is a function of both the size and duration of the transient spike. The ability of the the PSU to withstand these spikes is a function of the PSU efficiency.

Calculations of TDP wattage try to use RMS methods to determine average system loads but the stress a PSU sees is not only a function of this average pull but also how many and how large these transient spikes are. This is why when trying to size PSU's you should try to stay in the 50-75% of rated TDP load range, which is the operating sweet spot for electrical components like transistors and capacitors. Being too high and too low can have detrimental effects on the capacitors in a PSU.

The link you have provided as a guide is the TDP wattage of GPU's and would be the number used in the Outervision calculator. Most agree that this is typically an overestimate of the GPU wattage requirement and very rarely an underestimate.

http://www.tomshardware.com/reviews/nvidia-geforce-gtx-1080-pascal,4572-10.html
 
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