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Is an 850W PSU enough for dual 1080ti's?

Tartandy
By Tartandy
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Go to solution Solved by Jurrunio,

850W is enough. The PSU won't run at its highest efficiency, but it will work.

 

These big names will show their capacity under constant load.

Posted

I've just bought a new 1080ti / R7 1700 build with a  modular Corsair RMx 850 PSU. I'm thinking down the line I might upgrade to dual 1080ti's, but unsure if the 850W PSU will be enough seeing as according to PCPartPicker the estimated max load will be 694W with both 1080ti's.

 

Also as a side note: are PSU's generally given their wattage as RMS or as peak? I tried looking it up for the corsair RMx series and can't seem to find anything on it.

CPU: R7 1700 @ 3.7GHz - GPU: Asus 1080 Ti STRIX - RAM: Corsair Vengeance LPX 2x8GB DDR4 3200MHz - MB: ASUS X370 Crosshair VI Hero - Cooler: NZXT Kraken X62 2x140mm AIO - Samsung 850 EVO 500GB SSD - Case: Phanteks P400s Tempered Glass - Monitor: LG - 34UM88C 34.0" 3440x1440 KEYBOARD: Leopold FC660M ISO (MX blues) & Tai Hao Cement/Lavender keycaps

 

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850W is enough. The PSU won't run at its highest efficiency, but it will work.

 

These big names will show their capacity under constant load.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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Posted (edited)
5 minutes ago, Tartanskittles said:

I've just bought a new 1080ti / R7 1700 build with a  modular Corsair RMx 850 PSU. I'm thinking down the line I might upgrade to dual 1080ti's, but unsure if the 850W PSU will be enough seeing as according to PCPartPicker the estimated max load will be 694W with both 1080ti's.

 

Also as a side note: are PSU's generally given their wattage as RMS or as peak? I tried looking it up for the corsair RMx series and can't seem to find anything on it.

well I planned to buy two GTX 1080ti's with an 850, but they turned out a little more power hungry then I thought, so I'd say if you're not overclocking heavily maybe, my 850 watt comfortable powered two GTX 480's in SLI though. 

Edited by Lord Nicoll

Yours faithfully

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s

1 minute ago, Lord Nicoll said:

well I planned to buy two GTX 1080ti's with an 850, but they turned out a little more power hungry then I thought, so I'd say if you're not overclocking heavily maybe, my 850 watt comfortable powered two GTX 480's in SLI though. 

 

1 minute ago, CaptainKieseI said:

its enough

if you overclock you could get to 80-90% usage but on this psu its fine

Yeah I think I would not overclock just in case, thanks for the fast replies.

2 minutes ago, Jurrunio said:

These big names will show their capacity under constant load.

This is very reassuring to know, thank you.

CPU: R7 1700 @ 3.7GHz - GPU: Asus 1080 Ti STRIX - RAM: Corsair Vengeance LPX 2x8GB DDR4 3200MHz - MB: ASUS X370 Crosshair VI Hero - Cooler: NZXT Kraken X62 2x140mm AIO - Samsung 850 EVO 500GB SSD - Case: Phanteks P400s Tempered Glass - Monitor: LG - 34UM88C 34.0" 3440x1440 KEYBOARD: Leopold FC660M ISO (MX blues) & Tai Hao Cement/Lavender keycaps

 

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Posted

it's enough for dual 1080tis.

https://www.overclock3d.net/reviews/gpu_displays/asus_gtx1080_ti_strix_oc_sli_overkill3d_review/2 656w with oc gtx 1080ti strix and a 6850k.

CPU: AMD Ryzen 5 5600X Heatsink: Gelid Phantom Black GPU: Palit RTX 3060 Ti Dual RAM: Corsair DDR4 2x8GB 3000Mhz mobo: Asus X570-P case: Fractal Design Define C PSU: Superflower Leadex Gold 650W

 

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Will be fine, dont think OC'ing should be a problem. 

Please quote our replys so we get a notification and can reply easily. Never cheap out on a PSU, or I will come to watch the fireworks. 

PSU Tier List

 

My specs

Spoiler

PC:

CPU: Intel Core i5-6600K @4.8GHz
CPU Cooler: Noctua NH-U14S 
Motherboard:  ASUS Maximus VIII Hero 
GPU: Zotac AMP Extreme 1070 @ 2114Mhz
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2400 
Storage: Samsung 850 EVO-Series 500GB 
Storage: Western Digital Caviar Blue 1TB
Case: Cooler Master MasterCase Pro 5 
Power Supply: EVGA 750W G2

 

Peripherals 

Keyboard: Corsair K70 LUX Browns
Mouse: Logitech G502 
Headphones: Kingston HyperX Cloud Revolver 

Monitor: U2713M @ 75Hz

 

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