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Why buy a 1000w power supply?

haunebu
By haunebu
in Power Supplies
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I am building my new system and i have planned on buying a 1000w power supply for it. My question is: "Is a 1000W power supply really necessary or am I just wasting my money?" Is there any use for having a 1000w power supply? What could it do that a normal 600w or 750w power supply can't do?

I was buying a 1000w power supply because I want my new PC to last for awhile and not have any problems. There is really no specific reason i am getting one other than to have a more powerful computer. So i am buying top end products. But i am thinking spending $200 on a 1000w power supply might be over kill. What do you think? 

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what are your specs?. For gaming rig you are usually fine with 450w/550w unit. 

I Use my knowledge as business owner and self taught technician aswell as an AI to help people. AI might be controversial but it actually works pretty well 90% of the time.

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1 minute ago, haunebu said:

I am building my new system and i have planned on buying a 1000w power supply for it. My question is: "Is a 1000W power supply really necessary or am I just wasting my money?" Is there any use for having a 1000w power supply? What could it do that a normal 600w or 750w power supply can't do?

I was buying a 1000w power supply because I want my new PC to last for awhile and not have any problems. There is really no specific reason i am getting one other than to have a more powerful computer. So i am buying top end products. But i am thinking spending $200 on a 1000w power supply might be over kill. What do you think? 

usually people choose power supplies after theyve chosen their components, if youre planning to use a threadripper, watercooled and overclocked with 2 or more power hungry graphics cards then i could see a 1000w psu being a good option

gaming system: R7 3700X @ 4.25Ghz cpu / B450 STEEL LEGEND mobo / 4x8gb corsair Vengeance @3333Mhz ram / RX 7900XTX pulse gpu / Be Quiet Dark Rock Pro 3 cpu cooler /Coolermaster Qube 500 case / Be Quiet Dark Power Pro 12 1500w power supply

 

laptop: Dell xps 9510, 3.5k OLED, i7 11800h, rtx 3050 ti, 2x16gb DDR4 @ 3200Mhz, 1TB main drive, 2TB add in ssd

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1. Render machines with multiple GPUs

2. Those aiming for best efficiency (on top of the highest 80+ rating)

3. HEDT platform users ($200 a PSU doesnt differ to them as a $100 one) along with multiple GPUs

4. Extreme overclockers (tho they usually aim for more, just in case there's a multiGPU competition going on)

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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7 minutes ago, haunebu said:

I am building my new system and i have planned on buying a 1000w power supply for it. My question is: "Is a 1000W power supply really necessary or am I just wasting my money?" Is there any use for having a 1000w power supply? What could it do that a normal 600w or 750w power supply can't do?

I was buying a 1000w power supply because I want my new PC to last for awhile and not have any problems. There is really no specific reason i am getting one other than to have a more powerful computer. So i am buying top end products. But i am thinking spending $200 on a 1000w power supply might be over kill. What do you think? 

Anyone that needs a 1000W PSU, should buy a 1000W PSU. Anyone that does not need a 1000W PSU, should not get a PSU.

Usually it's only needed to get 1000W+ if you are using HEDT with a high end GPU (and overclocking a LOT) or if you are running HEDT + multiple GPU's.

 

For most people, a good 750W PSU will do the same as a good 1000W PSU.

 

P.S. keep in mind, higher wattage PSU's are usually physically larger. So do check if you case will fit the PSU you're thinking of getting!

"We're all in this together, might as well be friends" Tom, Toonami.

 

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

 

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At one time, multi-gpu had noticeable benefits and 300-400 watt gpu were a thing.  Back then it wasn't that hard to need 1000 watts.  Now you would need to be building a very special purpose rig to hit that.  Many accelerator(gpu/compute/fpga/ect) cards and or cpu would do it.  Anyone buying i9-9900k and dual 2080 ti for example, or folding at home rig with quad gpu, would need around that wattage.  Single gpu and gpu won't, without hard mods and LN2 at least.

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A power supply rated at 1000w means it can deliver if needed up to 1000w, but less if the load demands less.

If had say 12V 1000w supply then the current capability, max of what can be drawn, is 1000/12=83Amps, but it will be putting out this power and amps only if the load is such to demand it. In this case a load of 12V/83A=0.14 Ohms. If the load is higher resistance then less current will be needed and the supply will be supplying less power.

The 1000w or whatever the rating means the max wattage the supply can deliver.

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