Can you tell me if a 750 watt power supply is good for this new computer build

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kingbuckeye1

Prominent
Oct 16, 2017
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Hi,

Im building a computer that will be used 95% for video editing 4k footage. And about 5% for gaming. Its a $3k+ rig, so i want to make sure i get everything right with as few rma’s as possible.

Heres the link to my build:
https://pcpartpicker.com/list/PnQrZ8

(Keep in mind that i will also have two 1TB external usb hardrives connected as well.)

(Also keep in mind that i will be ever so slightly oc’ing the ram, cpu, and gpu)

And i work with adobe cc suite of products.

So my question is, will a 750w 80+ gold stand psu be adequate for this build. Or should i move up to the 850?

Thanks
 
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K

Kasper Jorgensen

Estimable
Jun 10, 2017
3,081
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3,960
750w is enough, i even think that 650w would be enough. But jesus, are you trying to make it fly with all those fans?

Changed the PSU to better one that is even cheaper.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 7 1700X 3.4GHz 8-Core Processor ($299.88 @ OutletPC)
CPU Cooler: NZXT - Kraken X62 Rev 2 98.2 CFM Liquid CPU Cooler ($151.79 @ SuperBiiz)
Thermal Compound: Arctic Silver - 5 High-Density Polysynthetic Silver 12g Thermal Paste ($16.39 @ OutletPC)
Motherboard: Asus - CROSSHAIR VI HERO ATX AM4 Motherboard ($233.99 @ SuperBiiz)
Memory: G.Skill - Trident Z RGB 32GB (4 x 8GB) DDR4-3000 Memory ($339.99 @ Newegg)
Storage: Samsung - 850 EVO-Series 500GB 2.5" Solid State Drive ($149.89 @ OutletPC)
Storage: Samsung - 850 EVO-Series 500GB 2.5" Solid State Drive ($149.89 @ OutletPC)
Storage: Samsung - 960 EVO 500GB M.2-2280 Solid State Drive ($233.88 @ OutletPC)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($45.69 @ OutletPC)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($45.69 @ OutletPC)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($45.69 @ OutletPC)
Video Card: EVGA - GeForce GTX 1080 Ti 11GB SC2 Video Card ($748.99 @ SuperBiiz)
Case: Corsair - 750D Airflow Edition ATX Full Tower Case ($151.99 @ Amazon)
Power Supply: Corsair - RMx 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($99.99 @ Amazon)
Optical Drive: Asus - DRW-24B1ST/BLK/B/AS DVD/CD Writer ($16.29 @ OutletPC)
Operating System: Microsoft - Windows 10 Home OEM 64-bit ($89.89 @ OutletPC)
Case Fan: Noctua - NF-F12 PWM 55.0 CFM 120mm Fan ($19.11 @ Newegg)
Case Fan: Noctua - NF-F12 PWM 55.0 CFM 120mm Fan ($19.11 @ Newegg)
Case Fan: Noctua - NF-A14 industrialPPC-3000 PWM 158.5 CFM 140mm Fan ($27.28 @ OutletPC)
Case Fan: Noctua - NF-A14 industrialPPC-3000 PWM 158.5 CFM 140mm Fan ($27.28 @ OutletPC)
Case Fan: Corsair - ML140 Pro LED 97.0 CFM 140mm Fan ($29.25 @ OutletPC)
Case Fan: Corsair - ML140 Pro LED 97.0 CFM 140mm Fan ($29.25 @ OutletPC)
Fan Controller: NZXT - Sentry Mix 2 Fan Controller ($29.88 @ OutletPC)
Total: $3001.08
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-28 19:13 EDT-0400
 
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Kasper Jorgensen

Estimable
Jun 10, 2017
3,081
1
3,960


Running his parts into a power calculator shows it will use around 550W. And that is without overclocking. The recommended specs for GTX 1080 TI is 600w.
 
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R

Rexper

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Apr 12, 2017
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Power supply calculators are inaccurate and always over estimate. Recommendations from manufacturers and such account for worst case scenario PSU, and again, over estimate.

Use professional benchmarks of similar systems. With their 'wall draw', multiply it by the PSU's efficiency to find the real power consumption of the components.

For example this system using a GTX 1080ti and 7700k used roughly 350w at a gaming load: https://www.techspot.com/review/1476-amd-radeon-vega-64/page12.html

Since OP's build has more drives and fans, I added 50w to the estimate.
 
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Kasper Jorgensen

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Jun 10, 2017
3,081
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It is very possible, but I would never recommend a PSU smaller than what is officially recommended.
Under full load of everything the GTX 1080 TI alone are going to use close to 300w, on top of that the CPU close to 100w and then come all his mobo, all his drives and fans. So it is a bit more than 400w.
I'm aware it will use less under gaming, but you really want a PSU strong enough for a torture test as well to be sure not to overload it.
 
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Rexper

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Apr 12, 2017
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The GTX 1080ti alone averages ~250 at very high load, and when overclocked ~300w. The 7700k will produce ~98w under a very heavy load. Though by the way computers work, these to workloads wouldn't happen simultaneously while gaming.

Even so, that's ~460w max, which is perfectly fine for a 650w unit.
 
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K

Kasper Jorgensen

Estimable
Jun 10, 2017
3,081
1
3,960


I'm, not disagreeing with you, however the GTX 1080 TI will use more than 250w unless it's the reference card, just look up the reviews here at TOMS. The 3rd. party cards are almost all overclocked from the box.
Anyway i agree 650w is enough in either way, i already said that in my first reply to this thread, however with the 750w, as it seems he has the money for it, he will stay in the most efficient range of the PSU and thus saving a tad on the electricity bills.
 
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