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Which is the cheapest suitable psu for 1080 ti SLI??

zindan
By zindan
in Power Supplies
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Just now, Jurrunio said:

850W? 1080ti SLI can use just under 600W overclocked, so it's enough, but not perfect.

Why not perfect? Should I have more? 

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4 minutes ago, zindan said:

Why not perfect? Should I have more? 

PSU are at their best efficiency at 45-70% load, so a 1200W PSU is better. I can see that you already have the 850W one, so don't change it out. 1200W PSUs are expensive themselves.

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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Just now, Jurrunio said:

PSU are at their best efficiency at 45-70% load, so a 1200W PSU is better. I can see that you already have the 850W one, so don't change it out. 1200W PSUs are expensive themselves.

WTf? What is the difference? Will I have lower fps? Will the gpus be damaged or break sooner? 

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1 minute ago, zindan said:

WTf? What is the difference? Will I have lower fps? Will the gpus be damaged or break sooner? 

No, you just won't be in it's peak effeciency

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Just now, BluJay614 said:

No, you just won't be in it's peak effeciency

What does that mean??? 

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1 minute ago, zindan said:

WTf? What is the difference? Will I have lower fps? Will the gpus be damaged or break sooner? 

no. running cost of the PC will be higher (a bit to a lot, depends on electricity cost), but there's no impact to the PC's performance.

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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2 minutes ago, Jurrunio said:

no. running cost of the PC will be higher (a bit to a lot, depends on electricity cost), but there's no impact to the PC's performance.

Sounds completely pointless to get a 1200 watt over a 850 then.... 

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Just now, zindan said:

What does that mean??? 

Power supplies will be at their most effeciant within a certain rage of wattage. What it spits out to your system and what it pulls from the wall are not equal, because no power supply is 100% effeciant. Depending on the rated effecency of the power supply, it will be between 80-96% effecient.

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Just now, zindan said:

Sounds completely pointless to get a 1200 watt over a 850 then.... 

There is. Long term power savings due to getting better efficiency.

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On 8/19/2017 at 6:29 PM, zindan said:
  • CPU
    i7 7700k
  • Motherboard
    Aorus by Gigabyte GA-Z270X-Gaming K5
  • RAM
    LPX 2x8GB DDR4 Black 3000MHz
  • GPU
    ASUS GeForce GTX1080 Strix
  • Case
    Cooler Master Storm Stryker - White
  • Storage
    Samsung 850 EVO Series 250GB
  • PSU
    EVGA PowerSupply (PSU) SuperNOVA G3 650W Gold Rated
  • Display(s)
    AOC G2460VQ6 + AOC E2470SWDA
  • Cooling
    Corsair Hydro H115i
  • Keyboard
    Mission SG GGK 3.1
  • Mouse
    Razer DeathAdder Elite
  • Operating System
    Windows 10 pro

Are you going to be buying a 4K monitor to make full use of the 2 x 1080ti's ?

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